platform/kernel/linux-stable.git
10 years agogpio: fix memory leak and sleep-while-atomic
Johan Hovold [Mon, 12 Jan 2015 16:12:27 +0000 (17:12 +0100)]
gpio: fix memory leak and sleep-while-atomic

commit 00acc3dc248063f982cfacfbe5e78c0d6797ffef upstream.

Fix memory leak and sleep-while-atomic in gpiochip_remove.

The memory leak was introduced by afa82fab5e13 ("gpio / ACPI: Move event
handling registration to gpiolib irqchip helpers") that moved the
release of acpi interrupt resources to gpiochip_irqchip_remove, but by
then the resources are no longer accessible as the acpi_gpio_chip has
already been freed by acpi_gpiochip_remove.

Note that this also fixes a few potential sleep-while-atomics, which has
been around since 1425052097b5 ("gpio: add IRQ chip helpers in gpiolib")
when the call to gpiochip_irqchip_remove while holding a spinlock was
added (a couple of irq-domain paths can end up grabbing mutexes).

Fixes: afa82fab5e13 ("gpio / ACPI: Move event handling registration to
gpiolib irqchip helpers")
Fixes: 1425052097b5 ("gpio: add IRQ chip helpers in gpiolib")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agogpio: fix memory and reference leaks in gpiochip_add error path
Johan Hovold [Mon, 12 Jan 2015 16:12:24 +0000 (17:12 +0100)]
gpio: fix memory and reference leaks in gpiochip_add error path

commit 5539b3c938d64a60cb1fc442ac3ce9263d52de0c upstream.

Memory allocated and references taken by of_gpiochip_add and
acpi_gpiochip_add were never released on errors in gpiochip_add (e.g.
failure to find free gpio range).

Fixes: 391c970c0dd1 ("of/gpio: add default of_xlate function if device
has a node pointer")
Fixes: 664e3e5ac64c ("gpio / ACPI: register to ACPI events
automatically")

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agogpio: crystalcove: use handle_nested_irq
Aaron Lu [Mon, 12 Jan 2015 02:09:32 +0000 (10:09 +0800)]
gpio: crystalcove: use handle_nested_irq

commit e733a2fb8cbcff0747108cb529ffb4e4a00465ac upstream.

The CrystalCove GPIO chip has can_sleep set so its demultiplexed irqs
will have IRQ_NESTED_THREAD flag set, thus we should use the nested
version handle_nested_irq in CrystalCove's irq handler instead of
handle_generic_irq, or the following warning will be hit and the
functionality is lost:

[ 4089.639554] Hardware name: ASUSTeK COMPUTER INC. T100TA/T100TA, BIOS T100TA.313 08/13/2014
[ 4089.639564]  00000002 00000000 c24fbdf4 c16e0257 c24fbe38 c24fbe28 c105390c c18ec480
[ 4089.639596]  c24fbe54 00000048 c18f8e3b 00000295 c10a60fc 00000295 c10a60fc f4464540
[ 4089.639626]  f446459c c278ad40 c24fbe40 c1053974 00000009 c24fbe38 c18ec480 c24fbe54
[ 4089.639656] Call Trace:
[ 4089.639685]  [<c16e0257>] dump_stack+0x41/0x52
[ 4089.639707]  [<c105390c>] warn_slowpath_common+0x8c/0xc0
[ 4089.639727]  [<c10a60fc>] ? irq_nested_primary_handler+0x2c/0x30
[ 4089.639744]  [<c10a60fc>] ? irq_nested_primary_handler+0x2c/0x30
[ 4089.639763]  [<c1053974>] warn_slowpath_fmt+0x34/0x40
[ 4089.639781]  [<c10a60fc>] irq_nested_primary_handler+0x2c/0x30
[ 4089.639800]  [<c10a5c56>] handle_irq_event_percpu+0x76/0x190
[ 4089.639818]  [<c1461570>] ? regmap_format_10_14_write+0x30/0x30
[ 4089.639836]  [<c1464f4c>] ? _regmap_bus_raw_write+0x4c/0x70
[ 4089.639854]  [<c10a5da1>] handle_irq_event+0x31/0x50
[ 4089.639872]  [<c10a83eb>] handle_simple_irq+0x4b/0x70
[ 4089.639889]  [<c10a5384>] generic_handle_irq+0x24/0x40
[ 4089.639908]  [<c1366d87>] crystalcove_gpio_irq_handler+0xa7/0xc0
[ 4089.639927]  [<c10a85a7>] handle_nested_irq+0x77/0x190
[ 4089.639947]  [<c1469801>] regmap_irq_thread+0x1b1/0x360
[ 4089.639966]  [<c10a6ae8>] irq_thread_fn+0x18/0x30
[ 4089.639983]  [<c10a6906>] irq_thread+0xf6/0x110
[ 4089.640001]  [<c10a6ad0>] ? irq_finalize_oneshot.part.30+0x1b0/0x1b0
[ 4089.640019]  [<c10a6b50>] ? irq_forced_thread_fn+0x50/0x50
[ 4089.640037]  [<c10a6810>] ? irq_thread_check_affinity+0xc0/0xc0
[ 4089.640054]  [<c106f389>] kthread+0xa9/0xc0
[ 4089.640074]  [<c16e6401>] ret_from_kernel_thread+0x21/0x30
[ 4089.640091]  [<c106f2e0>] ? kthread_create_on_node+0x110/0x110
[ 4089.640105] ---[ end trace dca7946ad31eba7d ]---

Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=90521
Reported-and-tested-by: Brian Loften <bloften80@gmail.com>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agogpiolib: of: Correct error handling in of_get_named_gpiod_flags
Hans Holmberg [Fri, 9 Jan 2015 08:40:43 +0000 (09:40 +0100)]
gpiolib: of: Correct error handling in of_get_named_gpiod_flags

commit 7b8792bbdffdff3abda704f89c6a45ea97afdc62 upstream.

of_get_named_gpiod_flags fails with -EPROBE_DEFER in cases
where the gpio chip is available and the GPIO translation fails.

This causes drivers to be re-probed erroneusly, and hides the
real problem(i.e. the GPIO number being out of range).

Signed-off-by: Hans Holmberg <hans.holmberg@intel.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agopinctrl: lantiq: remove bogus of_gpio_chip_add
Johan Hovold [Mon, 12 Jan 2015 16:20:51 +0000 (17:20 +0100)]
pinctrl: lantiq: remove bogus of_gpio_chip_add

commit 41f632fe177bc4822c2e8236fe7c291e6e9eb6f8 upstream.

Remove bogus call to of_gpiochip_add (and of_gpio_chip remove in error
path) which is also called when adding the gpio chip.

This prevents adding the same pinctrl range twice.

Fixes: 3f8c50c9b110 ("OF: pinctrl: MIPS: lantiq: implement lantiq/xway
pinctrl support")

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoARM: dts: berlin: correct BG2Q's SM GPIO location.
Jisheng Zhang [Fri, 26 Dec 2014 08:58:01 +0000 (16:58 +0800)]
ARM: dts: berlin: correct BG2Q's SM GPIO location.

commit 5138d5c562e3bfe30964e20ab46eec9f8b89225d upstream.

The gpio4 and gpio5 are in 0xf7fc0000 apb which is located in the SM domain.
This patch moves gpio4 and gpio5 to the correct location. This patch also
renames them as the following to match the names we internally used in
marvell:
gpio4 -> sm_gpio1
gpio5 -> sm_gpio0
porte -> portf
portf -> porte

This also matches what we did for BG2 and BG2CD's SM GPIO.

Fixes: cedf57fc4f2f ("ARM: dts: berlin: add the BG2Q GPIO nodes")
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoreset: sunxi: fix spinlock initialization
Tyler Baker [Mon, 12 Jan 2015 15:54:46 +0000 (07:54 -0800)]
reset: sunxi: fix spinlock initialization

commit 41544f9f38f19cb46dc9a8fa37c58677a0300899 upstream.

Call spin_lock_init() before the spinlocks are used, both in early init
and probe functions preventing a lockdep splat.

I have been observing lockdep complaining [1] during boot on my a80 optimus [2]
when CONFIG_PROVE_LOCKING has been enabled. This patch resolves the splat,
and has been tested on a few other sunxi platforms without issue.

[1] http://storage.kernelci.org/next/next-20150107/arm-multi_v7_defconfig+CONFIG_PROVE_LOCKING=y/lab-tbaker/boot-sun9i-a80-optimus.html
[2] http://kernelci.org/boot/?a80-optimus

Signed-off-by: Tyler Baker <tyler.baker@linaro.org>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agouas: Add US_FL_NO_ATA_1X for 2 more Seagate disk enclosures
Hans de Goede [Thu, 8 Jan 2015 14:15:15 +0000 (15:15 +0100)]
uas: Add US_FL_NO_ATA_1X for 2 more Seagate disk enclosures

commit 3ca8c717429b90f621aed28af029da4c3da378bc upstream.

Just like all previous UAS capable Seagate disk enclosures, these need the
US_FL_NO_ATA_1X to not crash when udev probes them.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agouas: Add US_FL_NO_REPORT_OPCODES for JMicron JMS566 with usb-id 0bc2:a013
Hans de Goede [Mon, 8 Dec 2014 08:50:47 +0000 (09:50 +0100)]
uas: Add US_FL_NO_REPORT_OPCODES for JMicron JMS566 with usb-id 0bc2:a013

commit c6fa3945c8b5baf62f2e849104ecd6f3a1e5e407 upstream.

Like the JMicron JMS567 enclosures with the JMS566 choke on report-opcodes,
so avoid it.

Tested-and-reported-by: Takeo Nakayama <javhera@gmx.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agouas: Add US_FL_NO_ATA_1X for Seagate devices with usb-id 0bc2:a013
Hans de Goede [Fri, 5 Dec 2014 10:11:29 +0000 (11:11 +0100)]
uas: Add US_FL_NO_ATA_1X for Seagate devices with usb-id 0bc2:a013

commit e5797a3d079f3e5049140055d850691b5cc7d10a upstream.

This is yet another Seagate device which needs the US_FL_NO_ATA_1X quirk

Reported-by: Marcin Zajączkowski <mszpak@wp.pl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agomei: clean reset bit before reset
Alexander Usyskin [Wed, 24 Dec 2014 22:37:46 +0000 (00:37 +0200)]
mei: clean reset bit before reset

commit b13a65ef190e488e2761d65bdd2e1fe8a3a125f5 upstream.

H_RST bit in H_CSR register may be found lit before reset is started,
for example if preceding reset flow hasn't completed.
In that case asserting H_RST will be ignored, therefore we need to clean
H_RST bit to start a successful reset sequence.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoNFSv4.1: Fix client id trunking on Linux
Trond Myklebust [Fri, 2 Jan 2015 21:25:08 +0000 (16:25 -0500)]
NFSv4.1: Fix client id trunking on Linux

commit 1fc0703af3143914a389bfa081c7acb09502ed5d upstream.

Currently, our trunking code will check for session trunking, but will
fail to detect client id trunking. This is a problem, because it means
that the client will fail to recognise that the two connections represent
shared state, even if they do not permit a shared session.
By removing the check for the server minor id, and only checking the
major id, we will end up doing the right thing in both cases: we close
down the new nfs_client and fall back to using the existing one.

Fixes: 05f4c350ee02e ("NFS: Discover NFSv4 server trunking when mounting")
Cc: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoftrace: Check both notrace and filter for old hash
Steven Rostedt (Red Hat) [Tue, 13 Jan 2015 19:03:38 +0000 (14:03 -0500)]
ftrace: Check both notrace and filter for old hash

commit 7485058eea40783ac142a60c3e799fc66ce72583 upstream.

Using just the filter for checking for trampolines or regs is not enough
when updating the code against the records that represent all functions.
Both the filter hash and the notrace hash need to be checked.

To trigger this bug (using trace-cmd and perf):

 # perf probe -a do_fork
 # trace-cmd start -B foo -e probe
 # trace-cmd record -p function_graph -n do_fork sleep 1

The trace-cmd record at the end clears the filter before it disables
function_graph tracing and then that causes the accounting of the
ftrace function records to become incorrect and causes ftrace to bug.

Link: http://lkml.kernel.org/r/20150114154329.358378039@goodmis.org
[ still need to switch old_hash_ops to old_ops_hash ]
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoftrace: Fix updating of filters for shared global_ops filters
Steven Rostedt (Red Hat) [Tue, 13 Jan 2015 16:20:43 +0000 (11:20 -0500)]
ftrace: Fix updating of filters for shared global_ops filters

commit 8f86f83709c585742dea5dd7f0d2b79c43f992ec upstream.

As the set_ftrace_filter affects both the function tracer as well as the
function graph tracer, the ops that represent each have a shared
ftrace_ops_hash structure. This allows both to be updated when the filter
files are updated.

But if function graph is enabled and the global_ops (function tracing) ops
is not, then it is possible that the filter could be changed without the
update happening for the function graph ops. This will cause the changes
to not take place and may even cause a ftrace_bug to occur as it could mess
with the trampoline accounting.

The solution is to check if the ops uses the shared global_ops filter and
if the ops itself is not enabled, to check if there's another ops that is
enabled and also shares the global_ops filter. In that case, the
modification still needs to be executed.

Link: http://lkml.kernel.org/r/20150114154329.055980438@goodmis.org
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoftrace/jprobes/x86: Fix conflict between jprobes and function graph tracing
Steven Rostedt (Red Hat) [Mon, 12 Jan 2015 17:12:03 +0000 (12:12 -0500)]
ftrace/jprobes/x86: Fix conflict between jprobes and function graph tracing

commit 237d28db036e411f22c03cfd5b0f6dc2aa9bf3bc upstream.

If the function graph tracer traces a jprobe callback, the system will
crash. This can easily be demonstrated by compiling the jprobe
sample module that is in the kernel tree, loading it and running the
function graph tracer.

 # modprobe jprobe_example.ko
 # echo function_graph > /sys/kernel/debug/tracing/current_tracer
 # ls

The first two commands end up in a nice crash after the first fork.
(do_fork has a jprobe attached to it, so "ls" just triggers that fork)

The problem is caused by the jprobe_return() that all jprobe callbacks
must end with. The way jprobes works is that the function a jprobe
is attached to has a breakpoint placed at the start of it (or it uses
ftrace if fentry is supported). The breakpoint handler (or ftrace callback)
will copy the stack frame and change the ip address to return to the
jprobe handler instead of the function. The jprobe handler must end
with jprobe_return() which swaps the stack and does an int3 (breakpoint).
This breakpoint handler will then put back the saved stack frame,
simulate the instruction at the beginning of the function it added
a breakpoint to, and then continue on.

For function tracing to work, it hijakes the return address from the
stack frame, and replaces it with a hook function that will trace
the end of the call. This hook function will restore the return
address of the function call.

If the function tracer traces the jprobe handler, the hook function
for that handler will not be called, and its saved return address
will be used for the next function. This will result in a kernel crash.

To solve this, pause function tracing before the jprobe handler is called
and unpause it before it returns back to the function it probed.

Some other updates:

Used a variable "saved_sp" to hold kcb->jprobe_saved_sp. This makes the
code look a bit cleaner and easier to understand (various tries to fix
this bug required this change).

Note, if fentry is being used, jprobes will change the ip address before
the function graph tracer runs and it will not be able to trace the
function that the jprobe is probing.

Link: http://lkml.kernel.org/r/20150114154329.552437962@goodmis.org
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoleds: netxbig: fix oops at probe time
Simon Guinot [Tue, 2 Dec 2014 15:32:10 +0000 (07:32 -0800)]
leds: netxbig: fix oops at probe time

commit 0c86ac2c50647451d6a70dc900f8bb0ee3d485d9 upstream.

This patch fixes a NULL pointer dereference on led_dat->mode_val. Due to
this bug, a kernel oops can be observed at probe time on the LaCie 2Big
and 5Big v2 boards:

Unable to handle kernel NULL pointer dereference at virtual address 00000008
[...]
[<c03f244c>] (netxbig_led_probe) from [<c02c8c6c>] (platform_drv_probe+0x4c/0x9c)
[<c02c8c6c>] (platform_drv_probe) from [<c02c72d0>] (driver_probe_device+0x98/0x25c)
[<c02c72d0>] (driver_probe_device) from [<c02c7520>] (__driver_attach+0x8c/0x90)
[<c02c7520>] (__driver_attach) from [<c02c5c24>] (bus_for_each_dev+0x68/0x94)
[<c02c5c24>] (bus_for_each_dev) from [<c02c6408>] (bus_add_driver+0x124/0x1dc)
[<c02c6408>] (bus_add_driver) from [<c02c7ac0>] (driver_register+0x78/0xf8)
[<c02c7ac0>] (driver_register) from [<c000888c>] (do_one_initcall+0x80/0x1cc)
[<c000888c>] (do_one_initcall) from [<c0733618>] (kernel_init_freeable+0xe4/0x1b4)
[<c0733618>] (kernel_init_freeable) from [<c058db9c>] (kernel_init+0xc/0xec)
[<c058db9c>] (kernel_init) from [<c0009850>] (ret_from_fork+0x14/0x24)
[...]

This bug was introduced by commit 588a6a99286ae30afb1339d8bc2163517b1b7dd1
("leds: netxbig: fix attribute-creation race").

Signed-off-by: Simon Guinot <simon.guinot@sequanux.org>
Acked-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrivers: net: cpsw: fix multicast flush in dual emac mode
Mugunthan V N [Tue, 13 Jan 2015 12:05:49 +0000 (17:35 +0530)]
drivers: net: cpsw: fix multicast flush in dual emac mode

commit 25906052d953d3fbdb7e19480b9de5e6bb949f3f upstream.

Since ALE table is a common resource for both the interfaces in Dual EMAC
mode and while bringing up the second interface in cpsw_ndo_set_rx_mode()
all the multicast entries added by the first interface is flushed out and
only second interface multicast addresses are added. Fixing this by
flushing multicast addresses based on dual EMAC port vlans which will not
affect the other emac port multicast addresses.

Fixes: d9ba8f9 (driver: net: ethernet: cpsw: dual emac interface implementation)
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoi40e: adds FCoE configure option
Vasu Dev [Wed, 14 Jan 2015 13:14:07 +0000 (05:14 -0800)]
i40e: adds FCoE configure option

commit 776d4e9f5c0229037707f692b386b1f2a5bac054 upstream.

Adds FCoE config option I40E_FCOE, so that FCoE can be enabled
as needed but otherwise have it disabled by default.

This also eliminate multiple FCoE config checks, instead now just
one config check for CONFIG_I40E_FCOE.

The I40E FCoE was added with 3.17 kernel and therefore this patch
shall be applied to stable 3.17 kernel also.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Tested-by: Jim Young <jamesx.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiwlwifi: mvm: fix Rx with both chains
Eyal Shapira [Wed, 31 Dec 2014 17:30:15 +0000 (19:30 +0200)]
iwlwifi: mvm: fix Rx with both chains

commit c93edc639392df733c7d72db4376a9add775d18a upstream.

commit 5c90422439d6
"iwlwifi: mvm: don't allow diversity if BT Coex / TT forbid it"
broke Rx with 2 chains for diversity.
This had an impact on throughput where we're using only a single
stream (11a/b/g APs, single stream APs, static SMPS).

Fixes: 5c90422439d6 ("iwlwifi: mvm: don't allow diversity if BT Coex / TT forbid it")
Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoarm64: partially revert "ARM: 8167/1: extend the reserved memory for initrd to be...
Catalin Marinas [Fri, 16 Jan 2015 13:56:38 +0000 (13:56 +0000)]
arm64: partially revert "ARM: 8167/1: extend the reserved memory for initrd to be page aligned"

commit 0145058c3d30b4319d747f64caa16a9cb15f0581 upstream.

This patch partially reverts commit 421520ba98290a73b35b7644e877a48f18e06004
(only the arm64 part). There is no guarantee that the boot-loader places other
images like dtb in a different page than initrd start/end, especially when the
kernel is built with 64KB pages. When this happens, such pages must not be
freed. The free_reserved_area() already takes care of rounding up "start" and
rounding down "end" to avoid freeing partially used pages.

Reported-by: Peter Maydell <Peter.Maydell@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agommc: sdhci: Set SDHCI_POWER_ON with external vmmc
Tim Kryger [Wed, 14 Jan 2015 06:24:12 +0000 (07:24 +0100)]
mmc: sdhci: Set SDHCI_POWER_ON with external vmmc

commit 3cbc6123a93dc91b99b58f7ea37d267fe93e1cad upstream.

Host controllers lacking the required internal vmmc regulator may still
follow the spec with regard to the LSB of SDHCI_POWER_CONTROL.  Set the
SDHCI_POWER_ON bit when vmmc is enabled to encourage the controller to
to drive CMD, DAT, SDCLK.

This fixes a regression observed on some Qualcomm and Nvidia boards
caused by 5222161 mmc: sdhci: Improve external VDD regulator support.

Fixes: 52221610dd84 (mmc: sdhci: Improve external VDD regulator support)
Signed-off-by: Tim Kryger <tim.kryger@gmail.com>
Tested-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agopowernv: Fix OPAL tracepoint code
Anton Blanchard [Tue, 6 Jan 2015 10:12:08 +0000 (21:12 +1100)]
powernv: Fix OPAL tracepoint code

commit bfe5fda8e7ced129716f5741cf7ed2592a338824 upstream.

Patch c49f63530bb6 ("powernv: Add OPAL tracepoints") has a spurious
store to the stack:

ld      r12,opal_tracepoint_refcount@toc(r2);           \
std     r12,32(r1);                                     \

The store was originally used to save the current tracepoint status
so the entry and the exit tracepoints were always balanced. In the
end I just created a separate path when tracepoints are enabled.

The offset on the stack used for this store is not valid for ABIv2
and it causes strange issues. I noticed it because OPAL console input
was broken.

Fixes: c49f63530bb6 ("powernv: Add OPAL tracepoints")
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agolocks: fix NULL-deref in generic_delete_lease
NeilBrown [Tue, 13 Jan 2015 02:17:43 +0000 (15:17 +1300)]
locks: fix NULL-deref in generic_delete_lease

commit 52d304eb4eaced9ad04b64ba7cd6ceb5153bbf18 upstream.

commit 0efaa7e82f02fe69c05ad28e905f31fc86e6f08e
  locks: generic_delete_lease doesn't need a file_lock at all

moves the call to fl->fl_lmops->lm_change() to a place in the
code where fl might be a non-lease lock.
When that happens, fl_lmops is NULL and an Oops ensures.

So add an extra test to restore correct functioning.

Reported-by: Linda Walsh <suse@tlinx.org>
Link: https://bugzilla.suse.com/show_bug.cgi?id=912569
Fixes: 0efaa7e82f02fe69c05ad28e905f31fc86e6f08e
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agovfio-pci: Fix the check on pci device type in vfio_pci_probe()
Wei Yang [Wed, 7 Jan 2015 17:29:11 +0000 (10:29 -0700)]
vfio-pci: Fix the check on pci device type in vfio_pci_probe()

commit 7c2e211f3c95b91912a92a8c6736343690042e2e upstream.

Current vfio-pci just supports normal pci device, so vfio_pci_probe() will
return if the pci device is not a normal device. While current code makes a
mistake. PCI_HEADER_TYPE is the offset in configuration space of the device
type, but we use this value to mask the type value.

This patch fixs this by do the check directly on the pci_dev->hdr_type.

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agovivid: fix CROP_BOUNDS typo for video output
Hans Verkuil [Sat, 6 Dec 2014 10:30:03 +0000 (07:30 -0300)]
vivid: fix CROP_BOUNDS typo for video output

commit bb9ff078860f9d2f79d3a6bea3af9f48354ddb75 upstream.

An error was returned if composing was not supported, instead of if
cropping was not supported.

A classic copy-and-paste bug. Found with v4l2-compliance.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoimg-ir/hw: Fix potential deadlock stopping timer
James Hogan [Mon, 1 Dec 2014 12:55:10 +0000 (09:55 -0300)]
img-ir/hw: Fix potential deadlock stopping timer

commit ac03086067a5524ae9e020ba5712a208c67b2736 upstream.

The end timer is used for switching back from repeat code timings when
no repeat codes have been received for a certain amount of time. When
the protocol is changed, the end timer is deleted synchronously with
del_timer_sync(), however this takes place while holding the main spin
lock, and the timer handler also needs to acquire the spin lock.

This opens the possibility of a deadlock on an SMP system if the
protocol is changed just as the repeat timer is expiring. One CPU could
end up in img_ir_set_decoder() holding the lock and waiting for the end
timer to complete, while the other CPU is stuck in the timer handler
spinning on the lock held by the first CPU.

Lockdep also spots a possible lock inversion in the same code, since
img_ir_set_decoder() acquires the img-ir lock before the timer lock, but
the timer handler will try and acquire them the other way around:

=========================================================
[ INFO: possible irq lock inversion dependency detected ]
3.18.0-rc5+ #957 Not tainted
---------------------------------------------------------
swapper/0/0 just changed the state of lock:
 (((&hw->end_timer))){+.-...}, at: [<4006ae5c>] _call_timer_fn+0x0/0xfc
but this lock was taken by another, HARDIRQ-safe lock in the past:
 (&(&priv->lock)->rlock#2){-.....}

and interrupts could create inverse lock ordering between them.

other info that might help us debug this:
 Possible interrupt unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(((&hw->end_timer)));
                               local_irq_disable();
                               lock(&(&priv->lock)->rlock#2);
                               lock(((&hw->end_timer)));
  <Interrupt>
    lock(&(&priv->lock)->rlock#2);

 *** DEADLOCK ***

This is fixed by releasing the main spin lock while performing the
del_timer_sync() call. The timer is prevented from restarting before the
lock is reacquired by a new "stopping" flag which img_ir_handle_data()
checks before updating the timer.

---------------------------------------------------------
swapper/0/0 just changed the state of lock:
 (((&hw->end_timer))){+.-...}, at: [<4006ae5c>] _call_timer_fn+0x0/0xfc
but this lock was taken by another, HARDIRQ-safe lock in the past:
 (&(&priv->lock)->rlock#2){-.....}
and interrupts could create inverse lock ordering between them.
other info that might help us debug this:
 Possible interrupt unsafe locking scenario:
       CPU0                    CPU1
       ----                    ----
  lock(((&hw->end_timer)));
                               local_irq_disable();
                               lock(&(&priv->lock)->rlock#2);
                               lock(((&hw->end_timer)));
  <Interrupt>
    lock(&(&priv->lock)->rlock#2);
 *** DEADLOCK ***
This is fixed by releasing the main spin lock while performing the
del_timer_sync() call. The timer is prevented from restarting before the
lock is reacquired by a new "stopping" flag which img_ir_handle_data()
checks before updating the timer.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Sifan Naeem <sifan.naeem@imgtec.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoimg-ir/hw: Always read data to clear buffer
Dylan Rajaratnam [Mon, 17 Nov 2014 12:17:45 +0000 (09:17 -0300)]
img-ir/hw: Always read data to clear buffer

commit ea0de4ec5489da0fe738b274effac4f950e93d76 upstream.

A problem was found on Polaris where if the unit it booted via the power
button on the infrared remote then the next button press on the remote
would return the key code used to power on the unit.

The sequence is:
 - The polaris powered off but with the powerdown controller (PDC) block
   still powered.
 - Press power key on remote, IR block receives the key.
 - Kernel starts, IR code is in IMG_IR_DATA_x but neither IMG_IR_RXDVAL
   or IMG_IR_RXDVALD2 are set.
 - Wait any amount of time.
 - Press any key.
 - IMG_IR_RXDVAL or IMG_IR_RXDVALD2 is set but IMG_IR_DATA_x is
   unchanged since the powerup key data was never read.

This is worked around by always reading the IMG_IR_DATA_x in
img_ir_set_decoder(), rather than only when the IMG_IR_RXDVAL or
IMG_IR_RXDVALD2 bit is set.

Signed-off-by: Dylan Rajaratnam <dylan.rajaratnam@imgtec.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agouvcvideo: Fix destruction order in uvc_delete()
Takashi Iwai [Fri, 24 Oct 2014 08:10:20 +0000 (05:10 -0300)]
uvcvideo: Fix destruction order in uvc_delete()

commit 2228d80dd05a4fc5a410fde847677b8fb3eb23d7 upstream.

We've got a bug report at disconnecting a Webcam, where the kernel
spews warnings like below:
  WARNING: CPU: 0 PID: 8385 at ../fs/sysfs/group.c:219 sysfs_remove_group+0x87/0x90()
  sysfs group c0b2350c not found for kobject 'event3'
  CPU: 0 PID: 8385 Comm: queue2:src Not tainted 3.16.2-1.gdcee397-default #1
  Hardware name: ASUSTeK Computer INC. A7N8X-E/A7N8X-E, BIOS ASUS A7N8X-E Deluxe ACPI BIOS Rev 1013  11/12/2004
    c08d0705 ddc75cbc c0718c5b ddc75ccc c024b654 c08c6d44 ddc75ce8 000020c1
    c08d0705 000000db c03d1ec7 c03d1ec7 00000009 00000000 c0b2350c d62c9064
    ddc75cd4 c024b6a3 00000009 ddc75ccc c08c6d44 ddc75ce8 ddc75cfc c03d1ec7
  Call Trace:
    [<c0205ba6>] try_stack_unwind+0x156/0x170
    [<c02046f3>] dump_trace+0x53/0x180
    [<c0205c06>] show_trace_log_lvl+0x46/0x50
    [<c0204871>] show_stack_log_lvl+0x51/0xe0
    [<c0205c67>] show_stack+0x27/0x50
    [<c0718c5b>] dump_stack+0x3e/0x4e
    [<c024b654>] warn_slowpath_common+0x84/0xa0
    [<c024b6a3>] warn_slowpath_fmt+0x33/0x40
    [<c03d1ec7>] sysfs_remove_group+0x87/0x90
    [<c05a2c54>] device_del+0x34/0x180
    [<c05e3989>] evdev_disconnect+0x19/0x50
    [<c05e06fa>] __input_unregister_device+0x9a/0x140
    [<c05e0845>] input_unregister_device+0x45/0x80
    [<f854b1d6>] uvc_delete+0x26/0x110 [uvcvideo]
    [<f84d66f8>] v4l2_device_release+0x98/0xc0 [videodev]
    [<c05a25bb>] device_release+0x2b/0x90
    [<c04ad8bf>] kobject_cleanup+0x6f/0x1a0
    [<f84d5453>] v4l2_release+0x43/0x70 [videodev]
    [<c0372f31>] __fput+0xb1/0x1b0
    [<c02650c1>] task_work_run+0x91/0xb0
    [<c024d845>] do_exit+0x265/0x910
    [<c024df64>] do_group_exit+0x34/0xa0
    [<c025a76f>] get_signal_to_deliver+0x17f/0x590
    [<c0201b6a>] do_signal+0x3a/0x960
    [<c02024f7>] do_notify_resume+0x67/0x90
    [<c071ebb5>] work_notifysig+0x30/0x3b
    [<b7739e60>] 0xb7739e5f
   ---[ end trace b1e56095a485b631 ]---

The cause is that uvc_status_cleanup() is called after usb_put_*() in
uvc_delete().  usb_put_*() removes the sysfs parent and eventually
removes the children recursively, so the later device_del() can't find
its sysfs.  The fix is simply rearrange the call orders in
uvc_delete() so that the child is removed before the parent.

Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=897736
Reported-and-tested-by: Martin Pluskal <mpluskal@suse.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agosound: Update au0828 quirks table
Mauro Carvalho Chehab [Thu, 30 Oct 2014 10:53:05 +0000 (07:53 -0300)]
sound: Update au0828 quirks table

commit 678fa12fb8e75c6dc1e781a02e3ddbbba7e1a904 upstream.

The au0828 quirks table is currently not in sync with the au0828
media driver.

Syncronize it and put them on the same order as found at au0828
driver, as all the au0828 devices with analog TV need the
same quirks.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agosound: simplify au0828 quirk table
Mauro Carvalho Chehab [Thu, 30 Oct 2014 10:53:04 +0000 (07:53 -0300)]
sound: simplify au0828 quirk table

commit 5d1f00a20d2d56ed480e64e938a2391353ee565b upstream.

Add a macro to simplify au0828 quirk table. That makes easier
to check it against the USB IDs at drivers/media/usb/au0828/au0828-cards.c.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agosmiapp: Take mutex during PLL update in sensor initialisation
Sakari Ailus [Tue, 16 Sep 2014 18:57:07 +0000 (15:57 -0300)]
smiapp: Take mutex during PLL update in sensor initialisation

commit f85698cd296f08218a7750f321e94607da128600 upstream.

The mutex does not serialise anything in this case but avoids a lockdep
warning from the control framework.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoaf9005: fix kernel panic on init if compiled without IR
Frank Schaefer [Mon, 29 Sep 2014 18:17:35 +0000 (15:17 -0300)]
af9005: fix kernel panic on init if compiled without IR

commit 2279948735609d0d17d7384e776b674619f792ef upstream.

This patches fixes an ancient bug in the dvb_usb_af9005 driver, which
has been reported at least in the following threads:
https://lkml.org/lkml/2009/2/4/350
https://lkml.org/lkml/2014/9/18/558

If the driver is compiled in without any IR support (neither
DVB_USB_AF9005_REMOTE nor custom symbols), the symbol_request calls in
af9005_usb_module_init() return pointers != NULL although the IR
symbols are not available.

This leads to the following oops:
...
[    8.529751] usbcore: registered new interface driver dvb_usb_af9005
[    8.531584] BUG: unable to handle kernel paging request at 02e00000
[    8.533385] IP: [<7d9d67c6>] af9005_usb_module_init+0x6b/0x9d
[    8.535613] *pde = 00000000
[    8.536416] Oops: 0000 [#1] PREEMPT PREEMPT DEBUG_PAGEALLOCDEBUG_PAGEALLOC
[    8.537863] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.0-rc6-00151-ga5c075c #1
[    8.539827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[    8.541519] task: 89c9a670 ti: 89c9c000 task.ti: 89c9c000
[    8.541519] EIP: 0060:[<7d9d67c6>] EFLAGS: 00010206 CPU: 0
[    8.541519] EIP is at af9005_usb_module_init+0x6b/0x9d
[    8.541519] EAX: 02e00000 EBX: 00000000 ECX: 00000006 EDX: 00000000
[    8.541519] ESI: 00000000 EDI: 7da33ec8 EBP: 89c9df30 ESP: 89c9df2c
[    8.541519]  DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
[    8.541519] CR0: 8005003b CR2: 02e00000 CR3: 05a54000 CR4: 00000690
[    8.541519] Stack:
[    8.541519]  7d9d675b 89c9df90 7d992a49 7d7d5914 89c9df4c 7be3a800 7d08c58c 8a4c3968
[    8.541519]  89c9df80 7be3a966 00000192 00000006 00000006 7d7d3ff4 8a4c397a 00000200
[    8.541519]  7d6b1280 8a4c3979 00000006 000009a6 7da32db8 b13eec81 00000006 000009a6
[    8.541519] Call Trace:
[    8.541519]  [<7d9d675b>] ? ttusb2_driver_init+0x16/0x16
[    8.541519]  [<7d992a49>] do_one_initcall+0x77/0x106
[    8.541519]  [<7be3a800>] ? parameqn+0x2/0x35
[    8.541519]  [<7be3a966>] ? parse_args+0x113/0x25c
[    8.541519]  [<7d992bc2>] kernel_init_freeable+0xea/0x167
[    8.541519]  [<7cf01070>] kernel_init+0x8/0xb8
[    8.541519]  [<7cf27ec0>] ret_from_kernel_thread+0x20/0x30
[    8.541519]  [<7cf01068>] ? rest_init+0x10c/0x10c
[    8.541519] Code: 08 c2 c7 05 44 ed f9 7d 00 00 e0 02 c7 05 40 ed f9 7d 00 00 e0 02 c7 05 3c ed f9 7d 00 00 e0 02 75 1f b8 00 00 e0 02 85 c0 74 16 <a1> 00 00 e0 02 c7 05 54 84 8e 7d 00 00 e0 02 a3 58 84 8e 7d eb
[    8.541519] EIP: [<7d9d67c6>] af9005_usb_module_init+0x6b/0x9d SS:ESP 0068:89c9df2c
[    8.541519] CR2: 0000000002e00000
[    8.541519] ---[ end trace 768b6faf51370fc7 ]---

The prefered fix would be to convert the whole IR code to use the kernel IR
infrastructure (which wasn't available at the time this driver had been created).

Until anyone who still has this old hardware steps up an does the conversion,
fix it by not calling the symbol_request calls if the driver is compiled in
without the default IR symbols (CONFIG_DVB_USB_AF9005_REMOTE).
Due to the IR related pointers beeing NULL by default, IR support will then be disabled.

The downside of this solution is, that it will no longer be possible to
compile custom IR symbols (not using CONFIG_DVB_USB_AF9005_REMOTE) in.

Please note that this patch has NOT been tested with all possible cases.
I don't have the hardware and could only verify that it fixes the reported
bug.

Reported-by: Fengguag Wu <fengguang.wu@intel.com>
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Luca Olivetti <luca@ventoso.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agosmiapp-pll: Correct clock debug prints
Sakari Ailus [Tue, 1 Apr 2014 13:22:46 +0000 (10:22 -0300)]
smiapp-pll: Correct clock debug prints

commit bc47150ab93988714d1fab7bc82fe5f505a107ad upstream.

The PLL flags were not used correctly.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agovideo/fbdev: fix defio's fsync
Tomi Valkeinen [Fri, 19 Dec 2014 11:55:41 +0000 (13:55 +0200)]
video/fbdev: fix defio's fsync

commit 30ea9c5218651bc11cbdba7820be78f04e2d83bc upstream.

fb_deferred_io_fsync() returns the value of schedule_delayed_work() as
an error code, but schedule_delayed_work() does not return an error. It
returns true/false depending on whether the work was already queued.

Fix this by ignoring the return value of schedule_delayed_work().

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agovideo/logo: prevent use of logos after they have been freed
Tomi Valkeinen [Thu, 18 Dec 2014 11:40:06 +0000 (13:40 +0200)]
video/logo: prevent use of logos after they have been freed

commit 92b004d1aa9f367c372511ca0330f58216b25703 upstream.

If the probe of an fb driver has been deferred due to missing
dependencies, and the probe is later ran when a module is loaded, the
fbdev framework will try to find a logo to use.

However, the logos are __initdata, and have already been freed. This
causes sometimes page faults, if the logo memory is not mapped,
sometimes other random crashes as the logo data is invalid, and
sometimes nothing, if the fbdev decides to reject the logo (e.g. the
random value depicting the logo's height is too big).

This patch adds a late_initcall function to mark the logos as freed. In
reality the logos are freed later, and fbdev probe may be ran between
this late_initcall and the freeing of the logos. In that case we will
miss drawing the logo, even if it would be possible.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agox86/build: Clean auto-generated processor feature files
Bjørn Mork [Tue, 23 Dec 2014 11:57:43 +0000 (12:57 +0100)]
x86/build: Clean auto-generated processor feature files

commit 280dbc572357eb50184663fc9e4aaf09c8141e9b upstream.

Commit 9def39be4e96 ("x86: Support compiling out human-friendly
processor feature names") made two source file targets
conditional. Such conditional targets will not be cleaned
automatically by make mrproper.

Fix by adding explicit clean-files targets for the two files.

Fixes: 9def39be4e96 ("x86: Support compiling out human-friendly processor feature names")
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Cc: Josh Triplett <josh@joshtriplett.org>
Link: http://lkml.kernel.org/r/1419335863-10608-1-git-send-email-bjorn@mork.no
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agonet: ethernet: cpsw: fix hangs with interrupts
Felipe Balbi [Fri, 2 Jan 2015 22:15:59 +0000 (16:15 -0600)]
net: ethernet: cpsw: fix hangs with interrupts

commit 7ce67a38f799d1fb332f672b117efbadedaa5352 upstream.

The CPSW IP implements pulse-signaled interrupts. Due to
that we must write a correct, pre-defined value to the
CPDMA_MACEOIVECTOR register so the controller generates
a pulse on the correct IRQ line to signal the End Of
Interrupt.

The way the driver is written today, all four IRQ lines
are requested using the same IRQ handler and, because of
that, we could fall into situations where a TX IRQ fires
but we tell the controller that we ended an RX IRQ (or
vice-versa). This situation triggers an IRQ storm on the
reserved IRQ 127 of INTC which will in turn call ack_bad_irq()
which will, then, print a ton of:

unexpected IRQ trap at vector 00

In order to fix the problem, we are moving all calls to
cpdma_ctlr_eoi() inside the IRQ handler and making sure
we *always* write the correct value to the CPDMA_MACEOIVECTOR
register. Note that the algorithm assumes that IRQ numbers and
value-to-be-written-to-EOI are proportional, meaning that a
write of value 0 would trigger an EOI pulse for the RX_THRESHOLD
Interrupt and that's the IRQ number sitting in the 0-th index
of our irqs_table array.

This, however, is safe at least for current implementations of
CPSW so we will refrain from making the check smarter (and, as
a side-effect, slower) until we actually have a platform where
IRQ lines are swapped.

This patch has been tested for several days with AM335x- and
AM437x-based platforms. AM57x was left out because there are
still pending patches to enable ethernet in mainline for that
platform. A read of the TRM confirms the statement on previous
paragraph.

Reported-by: Yegor Yefremov <yegorslists@googlemail.com>
Fixes: 510a1e7 (drivers: net: davinci_cpdma: acknowledge interrupt properly)
Signed-off-by: Felipe Balbi <balbi@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agostorvsc: ring buffer failures may result in I/O freeze
Long Li [Sat, 6 Dec 2014 03:38:18 +0000 (19:38 -0800)]
storvsc: ring buffer failures may result in I/O freeze

commit e86fb5e8ab95f10ec5f2e9430119d5d35020c951 upstream.

When ring buffer returns an error indicating retry, storvsc may not
return a proper error code to SCSI when bounce buffer is not used.
This has introduced I/O freeze on RAID running atop storvsc devices.
This patch fixes it by always returning a proper error code.

Signed-off-by: Long Li <longli@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoserial: fix parisc boot hang
James Bottomley [Fri, 2 Jan 2015 18:05:13 +0000 (10:05 -0800)]
serial: fix parisc boot hang

commit 68ed7e1c3d236e9e1e60ed6cae22f2c1c4ba2952 upstream.

This is a partial revert of 2f2dafe (serial: serial_core.c: printk
replacement) which gets us booting again.  The real problem seems to be
the _emit path in early boot.  However, until we can root cause it, we
need at least to get boot working.

Fixes: 2f2dafe77df2c78e189a9fa6b1879dffd06ae5a1
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoparisc: fix out-of-register compiler error in ldcw inline assembler function
John David Anglin [Sun, 14 Dec 2014 15:49:11 +0000 (10:49 -0500)]
parisc: fix out-of-register compiler error in ldcw inline assembler function

commit 45db07382a5c78b0c43b3b0002b63757fb60e873 upstream.

The __ldcw macro has a problem when its argument needs to be reloaded from
memory. The output memory operand and the input register operand both need to
be reloaded using a register in class R1_REGS when generating 64-bit code.
This fails because there's only a single register in the class. Instead, use a
memory clobber. This also makes the __ldcw macro a compiler memory barrier.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodm: fix missed error code if .end_io isn't implemented by target_type
zhendong chen [Wed, 17 Dec 2014 06:37:04 +0000 (14:37 +0800)]
dm: fix missed error code if .end_io isn't implemented by target_type

commit 5164bece1673cdf04782f8ed3fba70743700f5da upstream.

In bio-based DM's clone_endio(), when target_type doesn't implement
.end_io (e.g. linear) r will be always be initialized 0.  So if a
WRITE SAME bio fails WRITE SAME will not be disabled as intended.

Fix this by initializing r to error, rather than 0, in clone_endio().

Signed-off-by: Alex Chen <alex.chen@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Fixes: 7eee4ae2db ("dm: disable WRITE SAME if it fails")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agobugon.cocci: fix Options at the macro
Mauro Carvalho Chehab [Tue, 28 Oct 2014 17:18:24 +0000 (15:18 -0200)]
bugon.cocci: fix Options at the macro

commit 7426977c8efeaedf0a7ca00e1c1a5f52ef6b950f upstream.

The comma after --no-includes makes coccinelle to not run the script:

/usr/bin/spatch -D report --very-quiet --no-show-diff --cocci-file ./scripts/coccinelle/misc/bugon.cocci --no-includes, --include-headers --patch . --dir drivers/media/platform/coda/ -I ./arch/x86/include -I arch/x86/include/generated -I include -I ./arch/x86/include/uapi -I arch/x86/include/generated/uapi -I ./include/uapi -I include/generated/uapi -I ./include/linux/kconfig.h
Usage: spatch.opt --sp-file <SP> <infile> [-o <outfile>] [--iso-file <iso>] [options]
Options are:
  --sp-file                    <file> the semantic patch file
  -o                           <file> the output file
  --in-place                   do the modification on the file directly
  --backup-suffix              suffix to use when making a backup for inplace
...

At least with Fedora 20 coccinelle package:
coccinelle-1.0.0-0.rc20.1.fc21.x86_64

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Tested-by: Wolfram Sang <wsa@the-dreams.de>
Fixes: 5be1df66 (Coccinelle: Script to replace if and BUG with BUG_ON)
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoARM: dts: berlin: fix io clk and add missing core clk for BG2Q sdhci2 host
Jisheng Zhang [Wed, 31 Dec 2014 08:57:50 +0000 (16:57 +0800)]
ARM: dts: berlin: fix io clk and add missing core clk for BG2Q sdhci2 host

commit 96ed6046d3bf1113de3bdbd6dbb7f40e6d0ae0ef upstream.

On BG2Q, the sdhci2 host uses nfcecc for "io" clk and nfc for "core" clk.
The shdci2 can't work without this patch due to the "core" clk is gated.

Fixes: 0d859a6a9d14 ("ARM: dts: berlin: add the SDHCI nodes for the BG2Q")
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoclk: at91: keep slow clk enabled to prevent system hang
Boris Brezillon [Tue, 13 Jan 2015 14:44:06 +0000 (15:44 +0100)]
clk: at91: keep slow clk enabled to prevent system hang

commit dca1a4b5ff6e2c25adeff366eb06270dadeab3db upstream.

All slow clk users are not properly claiming it (get + prepare + enable)
before using it.
If all users properly claiming this clock release it, the clock is
disabled, but faulty users still depends on it, and the system hangs.

This fix prevents the slow clock from being disabled, and should solve the
hanging issue, but offending drivers should be patched to properly claim
this clock.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reported-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoclk: berlin: bg2q: remove non-exist "smemc" gate clock
Jisheng Zhang [Wed, 31 Dec 2014 08:57:52 +0000 (16:57 +0800)]
clk: berlin: bg2q: remove non-exist "smemc" gate clock

commit b71e8ecd57c8aae5b1815782c47b74ffe3efc09a upstream.

The "smemc" clock is removed on BG2Q SoCs. In fact, bit19 of clkenable
register is for nfc. Current code use bit19 for non-exist "smemc"
incorrectly, this prevents eMMC from working due to the sdhci's
"core" clk is still gated.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoclk: rockchip: fix rk3066 pll lock bit location
Heiko Stuebner [Wed, 24 Dec 2014 13:31:06 +0000 (14:31 +0100)]
clk: rockchip: fix rk3066 pll lock bit location

commit 12551f0239b50c88352e3292dd7703382addbf5e upstream.

The bit locations indicating the locking status of the plls on rk3066 are
shifted by one to the right when compared to the rk3188, bits [7:4] instead
of [8:5] on the rk3188, thus indicating the locking state of the wrong pll
or a completely different information in case of the gpll.

The recently introduced pll init code exposed that problem on some rk3066
boards when it tried to bring the boot-pll value in line with the value
from the rate table.

Fix this by defining separate pll definitions for rk3066 with the correct
locking indices.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Fixes: 2c14736c75db ("clk: rockchip: add clock driver for rk3188 and rk3066 clocks")
Tested-by: FUKAUMI Naoki <naobsd@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoclk: rockchip: fix rk3288 cpuclk core dividers
Heiko Stuebner [Thu, 18 Dec 2014 19:06:57 +0000 (20:06 +0100)]
clk: rockchip: fix rk3288 cpuclk core dividers

commit 9880d4277f6aab6b21404c824f9d9c652ba518ac upstream.

Commit 0e5bdb3f9fa5 (clk: rockchip: switch to using the new cpuclk type
for armclk) didn't take into account that the divider used on rk3288
are of the (n+1) type.

The rk3066 and rk3188 socs use more complex divider types making it
necessary for the list-elements to be the real register-values to write.

Therefore reduce divider values in the table accordingly so that they
really are the values that should be written to the registers and match
the dividers actually specified for the rk3288.

Reported-by: Sonny Rao <sonnyrao@chromium.org>
Fixes: 0e5bdb3f9fa5 ("clk: rockchip: switch to using the new cpuclk type for armclk")
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoRevert "clk: ppc-corenet: Fix Section mismatch warning"
Kevin Hao [Wed, 3 Dec 2014 08:53:51 +0000 (16:53 +0800)]
Revert "clk: ppc-corenet: Fix Section mismatch warning"

commit 176a107b868781c8d6868454aea7d07e0b82d6b8 upstream.

This reverts commit da788acb28386aa896224e784954bb73c99ff26c.

That commit tried to fix the section mismatch warning by moving the
ppc_corenet_clk_driver struct to init section. This is definitely wrong
because the kernel would free the memories occupied by this struct
after boot while this driver is still registered in the driver core.
The kernel would panic when accessing this driver struct.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoclk: Don't try to use a struct clk* after it could have been freed
Tomeu Vizoso [Tue, 2 Dec 2014 07:54:19 +0000 (08:54 +0100)]
clk: Don't try to use a struct clk* after it could have been freed

commit 10cdfe54dab034311c8e2fad9ba2dffbe616caa9 upstream.

As __clk_release could call kfree on clk and then we wouldn't have a safe way
of getting the module that owns the clock.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Fixes: fcb0ee6a3d33 ("clk: Implement clk_unregister")
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoclk: Really fix deadlock with mmap_sem
Stephen Boyd [Fri, 12 Dec 2014 23:04:16 +0000 (15:04 -0800)]
clk: Really fix deadlock with mmap_sem

commit 89f7e9de59bf3e3cda2e00de12c66db22675a7cf upstream.

Commit 6314b6796e3c (clk: Don't hold prepare_lock across debugfs
creation, 2014-09-04) forgot to update one place where we hold
the prepare_lock while creating debugfs directories. This means
we still have the chance of a deadlock that the commit was trying
to fix. Actually fix it by moving the debugfs creation outside
the prepare_lock.

Reported-by: Russell King <rmk+kernel@arm.linux.org.uk>
Fixes: 6314b6796e3c "clk: Don't hold prepare_lock across debugfs creation"
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
[mturquette@linaro.org: removed lockdep_assert]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoclk: samsung: Fix double add of syscore ops after driver rebind
Krzysztof Kozlowski [Wed, 26 Nov 2014 14:24:13 +0000 (15:24 +0100)]
clk: samsung: Fix double add of syscore ops after driver rebind

commit c31844ffdbd4e73a16c66e9d7df8ec290ab4b159 upstream.

During driver unbind the syscore ops were not unregistered which lead to
double add on syscore list:

$ echo "3810000.audss-clock-controller" > /sys/bus/platform/drivers/exynos-audss-clk/unbind
$ echo "3810000.audss-clock-controller" > /sys/bus/platform/drivers/exynos-audss-clk/bind
[ 1463.044061] ------------[ cut here ]------------
[ 1463.047255] WARNING: CPU: 0 PID: 1 at lib/list_debug.c:36 __list_add+0x8c/0xc0()
[ 1463.054613] list_add double add: new=c06e52c0, prev=c06e52c0, next=c06d5f84.
[ 1463.061625] Modules linked in:
[ 1463.064623] CPU: 0 PID: 1 Comm: bash Tainted: G        W      3.18.0-rc5-next-20141121-00005-ga8fab06eab42-dirty #1022
[ 1463.075338] [<c0014e2c>] (unwind_backtrace) from [<c0011d80>] (show_stack+0x10/0x14)
[ 1463.083046] [<c0011d80>] (show_stack) from [<c048bb70>] (dump_stack+0x70/0xbc)
[ 1463.090236] [<c048bb70>] (dump_stack) from [<c00233d4>] (warn_slowpath_common+0x74/0xb0)
[ 1463.098295] [<c00233d4>] (warn_slowpath_common) from [<c00234a4>] (warn_slowpath_fmt+0x30/0x40)
[ 1463.106962] [<c00234a4>] (warn_slowpath_fmt) from [<c020fe80>] (__list_add+0x8c/0xc0)
[ 1463.114760] [<c020fe80>] (__list_add) from [<c0282094>] (register_syscore_ops+0x30/0x3c)
[ 1463.122819] [<c0282094>] (register_syscore_ops) from [<c0392f20>] (exynos_audss_clk_probe+0x36c/0x460)
[ 1463.132091] [<c0392f20>] (exynos_audss_clk_probe) from [<c0283084>] (platform_drv_probe+0x48/0xa4)
[ 1463.141013] [<c0283084>] (platform_drv_probe) from [<c0281a14>] (driver_probe_device+0x13c/0x37c)
[ 1463.149852] [<c0281a14>] (driver_probe_device) from [<c0280560>] (bind_store+0x90/0xe0)
[ 1463.157822] [<c0280560>] (bind_store) from [<c027fd10>] (drv_attr_store+0x20/0x2c)
[ 1463.165363] [<c027fd10>] (drv_attr_store) from [<c0143898>] (sysfs_kf_write+0x4c/0x50)
[ 1463.173252] [<c0143898>] (sysfs_kf_write) from [<c0142c80>] (kernfs_fop_write+0xbc/0x198)
[ 1463.181395] [<c0142c80>] (kernfs_fop_write) from [<c00e2be0>] (vfs_write+0xa0/0x1a8)
[ 1463.189104] [<c00e2be0>] (vfs_write) from [<c00e2f00>] (SyS_write+0x40/0x8c)
[ 1463.196122] [<c00e2f00>] (SyS_write) from [<c000f2a0>] (ret_fast_syscall+0x0/0x48)
[ 1463.203655] ---[ end trace 08f6710c9bc8d8f3 ]---
[ 1463.208244] exynos-audss-clk 3810000.audss-clock-controller: setup completed

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: 1241ef94ccc3 ("clk: samsung: register audio subsystem clocks using common clock framework")
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoSCSI: fix regression in scsi_send_eh_cmnd()
Alan Stern [Fri, 21 Nov 2014 15:44:49 +0000 (10:44 -0500)]
SCSI: fix regression in scsi_send_eh_cmnd()

commit 511833acfc06c013d453e288f483c682c60ffbff upstream.

Commit ac61d1955934 (scsi: set correct completion code in
scsi_send_eh_cmnd()) introduced a bug.  It changed the stored return
value from a queuecommand call, but it didn't take into account that
the return value was used again later on.  This patch fixes the bug by
changing the later usage.

There is a big comment in the middle of scsi_send_eh_cmnd() which
does a good job of explaining how the routine works.  But it mentions
a "rtn = FAILURE" value that doesn't exist in the code.  This patch
adjusts the code to match the comment (I assume the comment is right
and the code is wrong).

This fixes Bugzilla #88341.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Андрей Аладьев <aladjev.andrew@gmail.com>
Tested-by: Андрей Аладьев <aladjev.andrew@gmail.com>
Fixes: ac61d19559349e205dad7b5122b281419aa74a82
Acked-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoscsi: fix random memory corruption with scsi-mq + T10 PI
Tony Battersby [Mon, 8 Dec 2014 22:20:52 +0000 (17:20 -0500)]
scsi: fix random memory corruption with scsi-mq + T10 PI

commit 120bb3e1e36da9c1ae6b978c825a28b944a5d7c5 upstream.

This fixes random memory corruption triggered when all three of the
following are true:

* scsi-mq enabled
* T10 Protection Information (DIF) enabled
* SCSI host with sg_tablesize > SCSI_MAX_SG_SEGMENTS (128)

The symptoms of this bug are unpredictable memory corruption, BUG()s,
oopses, lockups, etc., any of which may appear to be completely
unrelated to the root cause.

Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Reviewed-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoscsi: blacklist RSOC for Microsoft iSCSI target devices
Martin K. Petersen [Thu, 4 Dec 2014 02:18:10 +0000 (21:18 -0500)]
scsi: blacklist RSOC for Microsoft iSCSI target devices

commit 198a956a11b15b564ac06d1411881e215b587408 upstream.

The Microsoft iSCSI target does not support REPORT SUPPORTED OPERATION
CODES. Blacklist these devices so we don't attempt to send the command.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Tested-by: Mike Christie <michaelc@cs.wisc.edu>
Reported-by: jazz@deti74.ru
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoRevert "[SCSI] mpt3sas: Remove phys on topology change"
Sreekanth Reddy [Tue, 2 Dec 2014 15:28:47 +0000 (20:58 +0530)]
Revert "[SCSI] mpt3sas: Remove phys on topology change"

commit 2311ce4d9c91ed63a46e18f0378f3e406e7e888e upstream.

This reverts commit 963ba22b90a955363644cd397b20226928eab976
("mpt3sas: Remove phys on topology change")

Reverting the previous mpt3sas drives patch changes,
since we will observe below issue

Issue:
Drives connected Enclosure/Expander will unregister with
SCSI Transport Layer, if any one remove and add expander
cable with in DMD (Device Missing Delay) time period or
even any one power-off and power-on the Enclosure with in
the DMD period.

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoRevert "[SCSI] mpt2sas: Remove phys on topology change."
Sreekanth Reddy [Tue, 2 Dec 2014 15:28:46 +0000 (20:58 +0530)]
Revert "[SCSI] mpt2sas: Remove phys on topology change."

commit 81a89c2d891b78695aa7e4cc0d5a7427785ae078 upstream.

This reverts commit 3520f9c779bed098ca76dd3fb6377264301d57ed
("mpt2sas: Remove phys on topology change")

Reverting the previous mpt2sas drives patch changes,
since we will observe below issue

Issue:
Drives connected Enclosure/Expander will unregister with
SCSI Transport Layer, if any one remove and add expander
cable with in DMD (Device Missing Delay) time period or
even any one power-off and power-on the Enclosure with in
the DMD period.

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoRevert "drm/i915: Preserve VGACNTR bits from the BIOS"
Ville Syrjälä [Tue, 16 Dec 2014 16:38:37 +0000 (18:38 +0200)]
Revert "drm/i915: Preserve VGACNTR bits from the BIOS"

commit 01f5a6261cea395f72877aeb7c2fe2d42e1b1e00 upstream.

The VGA_2X_MODE bit apparently affects the display even when the VGA
plane is disabled. The bit will set by the BIOS when the panel width
is at least 1280 pixels. So by preserving the bit from the BIOS we
end up with corrupted display on machines with such high res panels.
I only have 1024x768 panels on my gen2 machines so never ran into
this problem.

The original reason for preserving the VGACNTR register was to make
my 830 survive S3 with acpi_sleep=s3_bios option. However after
further 830 fixes that option is no longer needed to make S3 work
and preserving VGACNTR doesn't seem to be necessary without it,
so we can just revert the entire patch.

This reverts
commit 69769f9a422bfc62e17399da3590c5e31ac37f24
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Fri Aug 15 01:22:08 2014 +0300

    drm/i915: Preserve VGACNTR bits from the BIOS

Cc: Bruno Prémont <bonbons@linux-vserver.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=87171
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiscsi,iser-target: Expose supported protection ops according to t10_pi
Sagi Grimberg [Tue, 2 Dec 2014 14:57:35 +0000 (16:57 +0200)]
iscsi,iser-target: Expose supported protection ops according to t10_pi

commit 23a548ee656c8ba6da8cb2412070edcd62e2ac5d upstream.

iSER will report supported protection operations based on
the tpg attribute t10_pi settings and HCA PI offload capabilities.
If the HCA does not support PI offload or tpg attribute t10_pi is
not set, we fall to SW PI mode.

In order to do that, we move iscsit_get_sup_prot_ops after connection
tpg assignment.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiser-target: Fix NULL dereference in SW mode DIF
Sagi Grimberg [Tue, 2 Dec 2014 14:57:34 +0000 (16:57 +0200)]
iser-target: Fix NULL dereference in SW mode DIF

commit 302cc7c3ca14d21ccdffdebdb61c4fe028f2d5ad upstream.

Fallback to software mode DIF if HCA does not support
PI (without crashing obviously). It is still possible to
run with backend protection and an unprotected frontend,
so looking at the command prot_op is not enough. Check
device PI capability on a per-IO basis (isert_prot_cmd
inline static) to determine if we need to handle protection
information.

Trace:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
IP: [<ffffffffa037f8b1>] isert_reg_sig_mr+0x351/0x3b0 [ib_isert]
Call Trace:
 [<ffffffff812b003a>] ? swiotlb_map_sg_attrs+0x7a/0x130
 [<ffffffffa038184d>] isert_reg_rdma+0x2fd/0x370 [ib_isert]
 [<ffffffff8108f2ec>] ? idle_balance+0x6c/0x2c0
 [<ffffffffa0382b68>] isert_put_datain+0x68/0x210 [ib_isert]
 [<ffffffffa02acf5b>] lio_queue_data_in+0x2b/0x30 [iscsi_target_mod]
 [<ffffffffa02306eb>] target_complete_ok_work+0x21b/0x310 [target_core_mod]
 [<ffffffff8106ece2>] process_one_work+0x182/0x3b0
 [<ffffffff8106fda0>] worker_thread+0x120/0x3c0
 [<ffffffff8106fc80>] ? maybe_create_worker+0x190/0x190
 [<ffffffff8107594e>] kthread+0xce/0xf0
 [<ffffffff81075880>] ? kthread_freezable_should_stop+0x70/0x70
 [<ffffffff8159a22c>] ret_from_fork+0x7c/0xb0
 [<ffffffff81075880>] ? kthread_freezable_should_stop+0x70/0x70

Reported-by: Slava Shwartsman <valyushash@gmail.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiser-target: Allocate PI contexts dynamically
Sagi Grimberg [Tue, 2 Dec 2014 14:57:31 +0000 (16:57 +0200)]
iser-target: Allocate PI contexts dynamically

commit 570db170f37715b7df23c95868169f3d9affa48c upstream.

This patch converts to allocate PI contexts dynamically in order
avoid a potentially bogus np->tpg_np and associated NULL pointer
dereference in isert_connect_request() during iser-target endpoint
shutdown with multiple network portals.

Also, there is really no need to allocate these at connection
establishment since it is not guaranteed that all the IOs on
that connection will be to a PI formatted device.

We can do it in a lazy fashion so the initial burst will have a
transient slow down, but very fast all IOs will allocate a PI
context.

Squashed:

iser-target: Centralize PI context handling code

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiser-target: Fix implicit termination of connections
Sagi Grimberg [Tue, 2 Dec 2014 14:57:29 +0000 (16:57 +0200)]
iser-target: Fix implicit termination of connections

commit b02efbfc9a051b41e71fe8f94ddf967260e024a6 upstream.

In situations such as bond failover, The new session establishment
implicitly invokes the termination of the old connection.

So, we don't want to wait for the old connection wait_conn to completely
terminate before we accept the new connection and post a login response.

The solution is to deffer the comp_wait completion and the conn_put to
a work so wait_conn will effectively be non-blocking (flush errors are
assumed to come very fast).

We allocate isert_release_wq with WQ_UNBOUND and WQ_UNBOUND_MAX_ACTIVE
to spread the concurrency of release works.

Reported-by: Slava Shwartsman <valyushash@gmail.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiser-target: Handle ADDR_CHANGE event for listener cm_id
Sagi Grimberg [Tue, 2 Dec 2014 14:57:27 +0000 (16:57 +0200)]
iser-target: Handle ADDR_CHANGE event for listener cm_id

commit ca6c1d82d12d8013fb75ce015900d62b9754623c upstream.

The np listener cm_id will also get ADDR_CHANGE event
upcall (in case it is bound to a specific IP). Handle
it correctly by creating a new cm_id and implicitly
destroy the old one.

Since this is the second event a listener np cm_id may
encounter, we move the np cm_id event handling to a
routine.

Squashed:

iser-target: Move cma_id setup to a function

Reported-by: Slava Shwartsman <valyushash@gmail.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiser-target: Fix connected_handler + teardown flow race
Sagi Grimberg [Tue, 2 Dec 2014 14:57:26 +0000 (16:57 +0200)]
iser-target: Fix connected_handler + teardown flow race

commit 19e2090fb246ca21b3e569ead51a6a7a1748eadd upstream.

Take isert_conn pointer from cm_id->qp->qp_context. This
will allow us to know that the cm_id context is always
the network portal. This will make the cm_id event check
(connection or network portal) more reliable.

In order to avoid a NULL dereference in cma_id->qp->qp_context
we destroy the qp after we destroy the cm_id (and make the
dereference safe). session stablishment/teardown sequences
can happen in parallel, we should take into account that
connected_handler might race with connection teardown flow.

Also, protect isert_conn->conn_device->active_qps decrement
within the error patch during QP creation failure and the
normal teardown path in isert_connect_release().

Squashed:

iser-target: Decrement completion context active_qps in error flow

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiser-target: Parallelize CM connection establishment
Sagi Grimberg [Tue, 2 Dec 2014 14:57:21 +0000 (16:57 +0200)]
iser-target: Parallelize CM connection establishment

commit 2371e5da8cfe91443339b54444dec6254fdd6dfc upstream.

There is no point in accepting a new CM request only
when we are completely done with the last iscsi login.
Instead we accept immediately, this will also cause the
CM connection to reach connected state and the initiator
is allowed to send the first login. We mark that we got
the initial login and let iscsi layer pick it up when it
gets there.

This reduces the parallel login sequence by a factor of
more then 4 (and more for multi-login) and also prevents
the initiator (who does all logins in parallel) from
giving up on login timeout expiration.

In order to support multiple login requests sequence (CHAP)
we call isert_rx_login_req from isert_rx_completion insead
of letting isert_get_login_rx call it.

Squashed:

iser-target: Use kref_get_unless_zero in connected_handler
iser-target: Acquire conn_mutex when changing connection state
iser-target: Reject connect request in failure path

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiser-target: Fix flush + disconnect completion handling
Sagi Grimberg [Tue, 2 Dec 2014 14:57:20 +0000 (16:57 +0200)]
iser-target: Fix flush + disconnect completion handling

commit 128e9cc84566a84146baea2335b3824288eed817 upstream.

ISER_CONN_UP state is not sufficient to know if
we should wait for completion of flush errors and
disconnected_handler event.

Instead, split it to 2 states:
- ISER_CONN_UP: Got to CM connected phase, This state
indicates that we need to wait for a CM disconnect
event before going to teardown.

- ISER_CONN_FULL_FEATURE: Got to full feature phase
after we posted login response, This state indicates
that we posted recv buffers and we need to wait for
flush completions before going to teardown.

Also avoid deffering disconnected handler to a work,
and handle it within disconnected handler.
More work here is needed to handle DEVICE_REMOVAL event
correctly (cleanup all resources).

Squashed:

iser-target: Don't deffer disconnected handler to a work

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiscsi,iser-target: Initiate termination only once
Sagi Grimberg [Tue, 2 Dec 2014 14:57:17 +0000 (16:57 +0200)]
iscsi,iser-target: Initiate termination only once

commit 954f23722b5753305be490330cf2680b7a25f4a3 upstream.

Since commit 0fc4ea701fcf ("Target/iser: Don't put isert_conn inside
disconnected handler") we put the conn kref in isert_wait_conn, so we
need .wait_conn to be invoked also in the error path.

Introduce call to isert_conn_terminate (called under lock)
which transitions the connection state to TERMINATING and calls
rdma_disconnect. If the state is already teminating, just bail
out back (temination started).

Also, make sure to destroy the connection when getting a connect
error event if didn't get to connected (state UP). Same for the
handling of REJECTED and UNREACHABLE cma events.

Squashed:

iscsi-target: Add call to wait_conn in establishment error flow

Reported-by: Slava Shwartsman <valyushash@gmail.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiscsi-target: Fail connection on short sendmsg writes
Nicholas Bellinger [Fri, 21 Nov 2014 04:50:07 +0000 (20:50 -0800)]
iscsi-target: Fail connection on short sendmsg writes

commit 6bf6ca7515c1df06f5c03737537f5e0eb191e29e upstream.

This patch changes iscsit_do_tx_data() to fail on short writes
when kernel_sendmsg() returns a value different than requested
transfer length, returning -EPIPE and thus causing a connection
reset to occur.

This avoids a potential bug in the original code where a short
write would result in kernel_sendmsg() being called again with
the original iovec base + length.

In practice this has not been an issue because iscsit_do_tx_data()
is only used for transferring 48 byte headers + 4 byte digests,
along with seldom used control payloads from NOPIN + TEXT_RSP +
REJECT with less than 32k of data.

So following Al's audit of iovec consumers, go ahead and fail
the connection on short writes for now, and remove the bogus
logic ahead of his proper upstream fix.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agogenirq: Prevent proc race against freeing of irq descriptors
Thomas Gleixner [Thu, 11 Dec 2014 22:01:41 +0000 (23:01 +0100)]
genirq: Prevent proc race against freeing of irq descriptors

commit c291ee622165cb2c8d4e7af63fffd499354a23be upstream.

Since the rework of the sparse interrupt code to actually free the
unused interrupt descriptors there exists a race between the /proc
interfaces to the irq subsystem and the code which frees the interrupt
descriptor.

CPU0 CPU1
show_interrupts()
  desc = irq_to_desc(X);
free_desc(desc)
  remove_from_radix_tree();
  kfree(desc);
  raw_spinlock_irq(&desc->lock);

/proc/interrupts is the only interface which can actively corrupt
kernel memory via the lock access. /proc/stat can only read from freed
memory. Extremly hard to trigger, but possible.

The interfaces in /proc/irq/N/ are not affected by this because the
removal of the proc file is serialized in procfs against concurrent
readers/writers. The removal happens before the descriptor is freed.

For architectures which have CONFIG_SPARSE_IRQ=n this is a non issue
as the descriptor is never freed. It's merely cleared out with the irq
descriptor lock held. So any concurrent proc access will either see
the old correct value or the cleared out ones.

Protect the lookup and access to the irq descriptor in
show_interrupts() with the sparse_irq_lock.

Provide kstat_irqs_usr() which is protecting the lookup and access
with sparse_irq_lock and switch /proc/stat to use it.

Document the existing kstat_irqs interfaces so it's clear that the
caller needs to take care about protection. The users of these
interfaces are either not affected due to SPARSE_IRQ=n or already
protected against removal.

Fixes: 1f5a5b87f78f "genirq: Implement a sane sparse_irq allocator"
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoIB/iser: Fix possible SQ overflow
Max Gurtovoy [Sun, 7 Dec 2014 14:09:56 +0000 (16:09 +0200)]
IB/iser: Fix possible SQ overflow

commit 6ec9d4d2310e8fc54fc638e4454271d1fcaefa95 upstream.

Fix a regression was introduced in commit 6df5a128f0fd ("IB/iser:
Suppress scsi command send completions").

The sig_count was wrongly set to be static variable, thus it is
possible that we won't reach to (sig_count % ISER_SIGNAL_BATCH) == 0
condition (due to races) and the send queue will be overflowed.

Instead keep sig_count per connection. We don't need it to be atomic
as we are safe under the iscsi session frwd_lock taken by libiscsi on
the queuecommand path.

Fixes: 6df5a128f0fd ("IB/iser: Suppress scsi command send completions")
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agotcm_loop: Fix wrong I_T nexus association
Hannes Reinecke [Wed, 26 Nov 2014 13:58:57 +0000 (14:58 +0100)]
tcm_loop: Fix wrong I_T nexus association

commit 506787a2c7daed45f0a213674ca706cbc83a9089 upstream.

tcm_loop has the I_T nexus associated with the HBA. This causes
commands to become misdirected if the HBA has more than one
target portal group; any command is then being sent to the
first target portal group instead of the correct one.

The nexus needs to be associated with the target portal group
instead.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agouapi/linux/target_core_user.h: fix headers_install.sh badness
Kyle McMartin [Thu, 18 Dec 2014 17:57:14 +0000 (12:57 -0500)]
uapi/linux/target_core_user.h: fix headers_install.sh badness

commit 3875f15207f9ecb3f24a8e91e7ad196899139595 upstream.

scripts/headers_install.sh will transform __packed to
__attribute__((packed)), so the #ifndef is not necessary.
(and, in fact, it's problematic, because we'll end up with the header
 containing:
#ifndef __attribute__((packed))
#define __attribu...
and so forth.)

Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agotick/powerclamp: Remove tick_nohz_idle abuse
Thomas Gleixner [Thu, 18 Dec 2014 10:51:01 +0000 (11:51 +0100)]
tick/powerclamp: Remove tick_nohz_idle abuse

commit a5fd9733a30d18d7ac23f17080e7e07bb3205b69 upstream.

commit 4dbd27711cd9 "tick: export nohz tick idle symbols for module
use" was merged via the thermal tree without an explicit ack from the
relevant maintainers.

The exports are abused by the intel powerclamp driver which implements
a fake idle state from a sched FIFO task. This causes all kinds of
wreckage in the NOHZ core code which rightfully assumes that
tick_nohz_idle_enter/exit() are only called from the idle task itself.

Recent changes in the NOHZ core lead to a failure of the powerclamp
driver and now people try to hack completely broken and backwards
workarounds into the NOHZ core code. This is completely unacceptable
and just papers over the real problem. There are way more subtle
issues lurking around the corner.

The real solution is to fix the powerclamp driver by rewriting it with
a sane concept, but that's beyond the scope of this.

So the only solution for now is to remove the calls into the core NOHZ
code from the powerclamp trainwreck along with the exports.

Fixes: d6d71ee4a14a "PM: Introduce Intel PowerClamp Driver"
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: Pan Jacob jun <jacob.jun.pan@intel.com>
Cc: LKP <lkp@01.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1412181110110.17382@nanos
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agohp_accel: Add support for HP ZBook 15
Dominique Leuenberger [Thu, 13 Nov 2014 19:57:37 +0000 (20:57 +0100)]
hp_accel: Add support for HP ZBook 15

commit 6583659e0f92e38079a8dd081e0a1181a0f37747 upstream.

HP ZBook 15 laptop needs a non-standard mapping (x_inverted).

BugLink: http://bugzilla.opensuse.org/show_bug.cgi?id=905329
Signed-off-by: Dominique Leuenberger <dimstar@opensuse.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoasus-nb-wmi: Add another wapf=4 quirk
Hans de Goede [Mon, 24 Nov 2014 10:26:32 +0000 (11:26 +0100)]
asus-nb-wmi: Add another wapf=4 quirk

commit 841e11ccdf90c29a7778a5d5d553bc716c3d477a upstream.

Wifi on this laptop does not work unless asus-nb-wmi.wapf=4 is specified on
the kerne commandline, add a quirk for this.

BugLink: https://bugs.launchpad.net/bugs/1173681
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agortlwifi: Fix error when accessing unmapped memory in skb
Larry Finger [Wed, 31 Dec 2014 03:33:07 +0000 (21:33 -0600)]
rtlwifi: Fix error when accessing unmapped memory in skb

commit e9538cf4f90713eca71b1d6a74b4eae1d445c664 upstream.

These drivers use 9100-byte receive buffers, thus allocating an skb requires
an O(3) memory allocation. Under heavy memory loads and fragmentation, such
a request can fail. Previous versions of the driver have dropped the packet
and reused the old buffer; however, the new version introduced a bug in that
it released the old buffer before trying to allocate a new one. The previous
method is implemented here. The skb is unmapped before any attempt is made to
allocate another.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Reported-by: Eric Biggers <ebiggers3@gmail.com>
Cc: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agortlwifi: rtl8192ce: Set fw_ready flag
Larry Finger [Wed, 10 Dec 2014 20:38:29 +0000 (14:38 -0600)]
rtlwifi: rtl8192ce: Set fw_ready flag

commit 9a1dce3a059111a7289680f4b8c0ec4f8736b6ee upstream.

The setting of this flag was missed in previous modifications.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agocfg80211: Fix 160 MHz channels with 80+80 and 160 MHz drivers
Jouni Malinen [Thu, 11 Dec 2014 21:48:55 +0000 (23:48 +0200)]
cfg80211: Fix 160 MHz channels with 80+80 and 160 MHz drivers

commit 08f6f147773b23b765b94633a8eaa82e7defcf4c upstream.

The VHT supported channel width field is a two bit integer, not a
bitfield. cfg80211_chandef_usable() was interpreting it incorrectly and
ended up rejecting 160 MHz channel width if the driver indicated support
for both 160 and 80+80 MHz channels.

Fixes: 3d9d1d6656a73 ("nl80211/cfg80211: support VHT channel configuration")
       (however, no real drivers had 160 MHz support it until 3.16)
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agocfg80211: avoid mem leak on driver hint set
Arik Nemtsov [Thu, 4 Dec 2014 10:22:16 +0000 (12:22 +0200)]
cfg80211: avoid mem leak on driver hint set

commit 34f05f543f02350e920bddb7660ffdd4697aaf60 upstream.

In the already-set and intersect case of a driver-hint, the previous
wiphy regdomain was not freed before being reset with a copy of the
cfg80211 regdomain.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Acked-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agocfg80211: don't WARN about two consecutive Country IE hint
Emmanuel Grumbach [Tue, 2 Dec 2014 07:53:25 +0000 (09:53 +0200)]
cfg80211: don't WARN about two consecutive Country IE hint

commit 70dcec5a488a7b81779190ac8089475fe4b8b962 upstream.

This can happen and there is no point in added more
detection code lower in the stack. Catching these in one
single point (cfg80211) is enough. Stop WARNING about this
case.

This fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=89001

Fixes: 2f1c6c572d7b ("cfg80211: process non country IE conflicting first")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agonl80211: check matches array length before acessing it
Luciano Coelho [Mon, 1 Dec 2014 09:32:09 +0000 (11:32 +0200)]
nl80211: check matches array length before acessing it

commit f89f46cf3a23d8d7c98f924a461fd931e1331746 upstream.

If the userspace passes a malformed sched scan request (or a net
detect wowlan configuration) by adding a NL80211_ATTR_SCHED_SCAN_MATCH
attribute without any nested matchsets, a NULL pointer dereference
will occur.  Fix this by checking that we do have matchsets in our
array before trying to access it.

BUG: unable to handle kernel NULL pointer dereference at 0000000000000024
IP: [<ffffffffa002fd69>] nl80211_parse_sched_scan.part.67+0x6e9/0x900 [cfg80211]
PGD 865c067 PUD 865b067 PMD 0
Oops: 0002 [#1] SMP
Modules linked in: iwlmvm(O) iwlwifi(O) mac80211(O) cfg80211(O) compat(O) [last unloaded: compat]
CPU: 2 PID: 2442 Comm: iw Tainted: G           O   3.17.2 #31
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
task: ffff880013800790 ti: ffff880008d80000 task.ti: ffff880008d80000
RIP: 0010:[<ffffffffa002fd69>]  [<ffffffffa002fd69>] nl80211_parse_sched_scan.part.67+0x6e9/0x900 [cfg80211]
RSP: 0018:ffff880008d838d0  EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000143c RSI: 0000000000000000 RDI: ffff880008ee8dd0
RBP: ffff880008d83948 R08: 0000000000000002 R09: 0000000000000019
R10: ffff88001d1b3c40 R11: 0000000000000002 R12: ffff880019e85e00
R13: 00000000fffffed4 R14: ffff880009757800 R15: 0000000000001388
FS:  00007fa3b6d13700(0000) GS:ffff88003e200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000024 CR3: 0000000008670000 CR4: 00000000000006e0
Stack:
 ffff880009757800 ffff880000000001 0000000000000000 ffff880008ee84e0
 0000000000000000 ffff880009757800 00000000fffffed4 ffff880008d83948
 ffffffff814689c9 ffff880009757800 ffff880008ee8000 0000000000000000
Call Trace:
 [<ffffffff814689c9>] ? nla_parse+0xb9/0x120
 [<ffffffffa00306de>] nl80211_set_wowlan+0x75e/0x960 [cfg80211]
 [<ffffffff810bf3d5>] ? mark_held_locks+0x75/0xa0
 [<ffffffff8161a77b>] genl_family_rcv_msg+0x18b/0x360
 [<ffffffff810bf66d>] ? trace_hardirqs_on+0xd/0x10
 [<ffffffff8161a9d4>] genl_rcv_msg+0x84/0xc0
 [<ffffffff8161a950>] ? genl_family_rcv_msg+0x360/0x360
 [<ffffffff81618e79>] netlink_rcv_skb+0xa9/0xd0
 [<ffffffff81619458>] genl_rcv+0x28/0x40
 [<ffffffff816184a5>] netlink_unicast+0x105/0x180
 [<ffffffff8161886f>] netlink_sendmsg+0x34f/0x7a0
 [<ffffffff8105a097>] ? kvm_clock_read+0x27/0x40
 [<ffffffff815c644d>] sock_sendmsg+0x8d/0xc0
 [<ffffffff811a75c9>] ? might_fault+0xb9/0xc0
 [<ffffffff811a756e>] ? might_fault+0x5e/0xc0
 [<ffffffff815d5d26>] ? verify_iovec+0x56/0xe0
 [<ffffffff815c73e0>] ___sys_sendmsg+0x3d0/0x3e0
 [<ffffffff810a7be8>] ? sched_clock_cpu+0x98/0xd0
 [<ffffffff810611b4>] ? __do_page_fault+0x254/0x580
 [<ffffffff810bb39f>] ? up_read+0x1f/0x40
 [<ffffffff810611b4>] ? __do_page_fault+0x254/0x580
 [<ffffffff812146ed>] ? __fget_light+0x13d/0x160
 [<ffffffff815c7b02>] __sys_sendmsg+0x42/0x80
 [<ffffffff815c7b52>] SyS_sendmsg+0x12/0x20
 [<ffffffff81751f69>] system_call_fastpath+0x16/0x1b

Fixes: ea73cbce4e1f ("nl80211: fix scheduled scan RSSI matchset attribute confusion")
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoxhci: Add broken-streams quirk for Fresco Logic FL1000G xhci controllers
Hans de Goede [Fri, 5 Dec 2014 10:11:28 +0000 (11:11 +0100)]
xhci: Add broken-streams quirk for Fresco Logic FL1000G xhci controllers

commit 7f5c4d631aed243ca89c6673427954210b1628ec upstream.

Streams do not work reliabe on Fresco Logic FL1000G xhci controllers,
trying to use them results in errors like this:

21:37:33 kernel: xhci_hcd 0000:04:00.0: ERROR Transfer event for disabled endpoint or incorrect stream ring
21:37:33 kernel: xhci_hcd 0000:04:00.0: @00000000368b3570 9067b000 00000000 05000000 01078001
21:37:33 kernel: xhci_hcd 0000:04:00.0: ERROR Transfer event for disabled endpoint or incorrect stream ring
21:37:33 kernel: xhci_hcd 0000:04:00.0: @00000000368b3580 9067b400 00000000 05000000 01038001

As always I've ordered a pci-e addon card with a Fresco Logic controller for
myself to see if I can come up with a better fix then the big hammer, in
the mean time this will make uas devices work again (in usb-storage mode)
for FL1000G users.

Reported-by: Marcin Zajączkowski <mszpak@wp.pl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoxhci: Check if slot is already in default state before moving it there
Mathias Nyman [Fri, 9 Jan 2015 15:18:28 +0000 (17:18 +0200)]
xhci: Check if slot is already in default state before moving it there

commit f161ead70fa6a62e432dff6e9dab8e3cfbeabea6 upstream.

Solves xhci error cases with debug messages:
xhci_hcd 0000:00:14.0: Setup ERROR: setup context command for slot 1.
usb 1-6: hub failed to enable device, error -22

xhci will give a context state error if we try to set a slot in default
state to the same default state with a special address device command.

Turns out this happends in several cases:
- retry reading the device rescriptor in hub_port_init()
- usb_reset_device() is called for a slot in default state
- in resume path, usb_port_resume() calls hub_port_init()

The default state is usually reached from most states with a reset device
command without any context state errors, but using the address device
command with BSA bit set (block set address) only works from the enabled
state and will otherwise cause context error.

solve this by checking if we are already in the default state before issuing
a address device BSA=1 command.

Fixes: 48fc7dbd52c0 ("usb: xhci: change enumeration scheme to 'new scheme'")
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agocxl: Unmap MMIO regions when detaching a context
Ian Munsie [Mon, 8 Dec 2014 08:18:01 +0000 (19:18 +1100)]
cxl: Unmap MMIO regions when detaching a context

commit b123429e6a9e8d03aacf888d23262835f0081448 upstream.

If we need to force detach a context (e.g. due to EEH or simply force
unbinding the driver) we should prevent the userspace contexts from
being able to access the Problem State Area MMIO region further, which
they may have mapped with mmap().

This patch unmaps any mapped MMIO regions when detaching a userspace
context.

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agocxl: Add timeout to process element commands
Ian Munsie [Mon, 8 Dec 2014 08:17:56 +0000 (19:17 +1100)]
cxl: Add timeout to process element commands

commit a98e6e9f4e0224d85b4d951edc44af16dfe6094a upstream.

In the event that something goes wrong in the hardware and it is unable
to complete a process element comment we would end up polling forever,
effectively making the associated process unkillable.

This patch adds a timeout to the process element command code path, so
that we will give up if the hardware does not respond in a reasonable
time.

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agocxl: Change contexts_lock to a mutex to fix sleep while atomic bug
Ian Munsie [Mon, 8 Dec 2014 08:17:55 +0000 (19:17 +1100)]
cxl: Change contexts_lock to a mutex to fix sleep while atomic bug

commit ee41d11d53c8fc4968f0816504651541d606cf40 upstream.

We had a known sleep while atomic bug if a CXL device was forcefully
unbound while it was in use. This could occur as a result of EEH, or
manually induced with something like this while the device was in use:

echo 0000:01:00.0 > /sys/bus/pci/drivers/cxl-pci/unbind

The issue was that in this code path we iterated over each context and
forcefully detached it with the contexts_lock spin lock held, however
the detach also needed to take the spu_mutex, and call schedule.

This patch changes the contexts_lock to a mutex so that we are not in
atomic context while doing the detach, thereby avoiding the sleep while
atomic.

Also delete the related TODO comment, which suggested an alternate
solution which turned out to not be workable.

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoARC: [nsimosci] move peripherals to match model to FPGA
Vineet Gupta [Wed, 1 Oct 2014 08:58:36 +0000 (14:28 +0530)]
ARC: [nsimosci] move peripherals to match model to FPGA

commit e8ef060b37c2d3cc5fd0c0edbe4e42ec1cb9768b upstream.

This allows the sdplite/Zebu images to run on OSCI simulation platform

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/irq: BUG_ON() -> WARN_ON()
Rob Clark [Sat, 8 Nov 2014 15:16:19 +0000 (10:16 -0500)]
drm/irq: BUG_ON() -> WARN_ON()

commit 7f907bf284ba7bb8d271f094b226699d3fef2142 upstream.

Let's make things a bit easier to debug when things go bad (potentially
under console_lock).

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Cc: Anand Moon <moon.linux@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/i915: Don't call intel_prepare_page_flip() multiple times on gen2-4
Ville Syrjälä [Wed, 17 Dec 2014 21:08:03 +0000 (23:08 +0200)]
drm/i915: Don't call intel_prepare_page_flip() multiple times on gen2-4

commit 7d47559ee84b3ac206aa9e675606fafcd7c0b500 upstream.

The flip stall detector kicks in when pending>=INTEL_FLIP_COMPLETE. That
means if we first call intel_prepare_page_flip() but don't call
intel_finish_page_flip(), the next stall check will erroneosly think
the page flip was somehow stuck.

With enough debug spew emitted from the interrupt handler my 830 hangs
when this happens. My theory is that the previous vblank interrupt gets
sufficiently delayed that the handler will see the pending bit set in
IIR, but ISR still has the bit set as well (ie. the flip was processed
by CS but didn't complete yet). In this case the handler will proceed
to call intel_check_page_flip() immediately after
intel_prepare_page_flip(). It then tries to print a backtrace for the
stuck flip WARN, which apparetly results in way too much debug spew
delaying interrupt processing further. That then seems to cause an
endless loop in the interrupt handler, and the machine is dead until
the watchdog kicks in and reboots. At least limiting the number of
iterations of the loop in the interrupt handler also prevented the
hang.

So it seems better to not call intel_prepare_page_flip() without
immediately calling intel_finish_page_flip(). The IIR/ISR trickery
avoids races here so this is a perfectly safe thing to do.

v2: Fix typo in commit message (checkpatch)

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=88381
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=85888
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/i915: Disable PSMI sleep messages on all rings around context switches
Chris Wilson [Tue, 16 Dec 2014 10:02:27 +0000 (10:02 +0000)]
drm/i915: Disable PSMI sleep messages on all rings around context switches

commit 2c550183476dfa25641309ae9a28d30feed14379 upstream.

There exists a current workaround to prevent a hang on context switch
should the ring go to sleep in the middle of the restore,
WaProgramMiArbOnOffAroundMiSetContext (applicable to all gen7+). In
spite of disabling arbitration (which prevents the ring from powering
down during the critical section) we were still hitting hangs that had
the hallmarks of the known erratum. That is we are still seeing hangs
"on the last instruction in the context restore". By comparing -nightly
(broken) with requests (working), we were able to deduce that it was the
semaphore LRI cross-talk that reproduced the original failure. The key
was that requests implemented deferred semaphore signalling, and
disabling that, i.e. emitting the semaphore signal to every other ring
after every batch restored the frequent hang.  Explicitly disabling PSMI
sleep on the RCS ring was insufficient, all the rings had to be awake to
prevent the hangs. Fortunately, we can reduce the wakelock to the
MI_SET_CONTEXT operation itself, and so should be able to limit the extra
power implications.

Since the MI_ARB_ON_OFF workaround is listed for all gen7 and above
products, we should apply this extra hammer for all of the same
platforms despite so far that we have only been able to reproduce the
hang on certain ivb and hsw models. The last question is whether we want
to always use the extra hammer or only when we know semaphores are in
operation. At the moment, we only use LRI on non-RCS rings for
semaphores, but that may change in the future with the possibility of
reintroducing this bug under subtle conditions.

v2: Make it explicit that the PSMI LRI are an extension to the original
workaround for the other rings.
v3: Bikeshedding variable names and whitespacing

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80660
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83677
Cc: Simon Farnsworth <simon@farnz.org.uk>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Peter Frühberger <fritsch@xbmc.org>
Reviewed-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/i915: Force the CS stall for invalidate flushes
Chris Wilson [Tue, 16 Dec 2014 08:44:32 +0000 (08:44 +0000)]
drm/i915: Force the CS stall for invalidate flushes

commit add284a3a2481e759d6bec35f6444c32c8ddc383 upstream.

In order to act as a full command barrier by itself, we need to tell the
pipecontrol to actually stall the command streamer while the flush runs.
We require the full command barrier before operations like
MI_SET_CONTEXT, which currently rely on a prior invalidate flush.

References: https://bugs.freedesktop.org/show_bug.cgi?id=83677
Cc: Simon Farnsworth <simon@farnz.org.uk>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/i915: Invalidate media caches on gen7
Chris Wilson [Tue, 16 Dec 2014 08:44:31 +0000 (08:44 +0000)]
drm/i915: Invalidate media caches on gen7

commit 148b83d0815a3778c8949e6a97cb798cbaa0efb3 upstream.

In the gen7 pipe control there is an extra bit to flush the media
caches, so let's set it during cache invalidation flushes.

v2: Rename to MEDIA_STATE_CLEAR to be more inline with spec.

Cc: Simon Farnsworth <simon@farnz.org.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/nv4c/mc: disable msi
Ilia Mirkin [Tue, 16 Dec 2014 18:55:38 +0000 (13:55 -0500)]
drm/nv4c/mc: disable msi

commit 4761703bd04bbdf56396d264903cc5a1fdcb3c01 upstream.

Several users have, over time, reported issues with MSI on these IGPs.
They're old, rarely available, and MSI doesn't provide such huge
advantages on them. Just disable.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=87361
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=74492
Fixes: fa8c9ac72fe ("drm/nv4c/mc: nv4x igp's have a different msi rearm register")
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/i915: save/restore GMBUS freq across suspend/resume on gen4
Jesse Barnes [Wed, 10 Dec 2014 20:16:05 +0000 (12:16 -0800)]
drm/i915: save/restore GMBUS freq across suspend/resume on gen4

commit 9f49c37635d5c2a801f7670d5fbf0b25ec461f2c upstream.

Should probably just init this in the GMbus code all the time, based on
the cdclk and HPLL like we do on newer platforms.  Ville has code for
that in a rework branch, but until then we can fix this bug fairly
easily.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76301
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Nikolay <mar.kolya@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/i915: resume MST after reading back hw state
Dave Airlie [Mon, 8 Dec 2014 03:23:37 +0000 (13:23 +1000)]
drm/i915: resume MST after reading back hw state

commit e7d6f7d708290da1b7c92f533444b042c79412e0 upstream.

Otherwise the MST resume paths can hit DPMS paths
which hit state checker paths, which hit WARN_ON,
because the state checker is inconsistent with the
hw.

This fixes a bunch of WARN_ON's on resume after
undocking.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/i915: Only warn the first time we attempt to mmio whilst suspended
Chris Wilson [Mon, 24 Nov 2014 08:03:12 +0000 (08:03 +0000)]
drm/i915: Only warn the first time we attempt to mmio whilst suspended

commit 2b387059817fd100cddc5a97118d63e3f3fade74 upstream.

In all likelihood we will do a few hundred errnoneous register
operations if we do a single invalid register access whilst the device
is suspended. As each instance causes a WARN, this floods the system
logs and can make the system unresponsive.

The warning was first introduced in
commit b2ec142cb0101f298f8e091c7d75b1ec5b809b65
Author: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date:   Fri Feb 21 13:52:25 2014 -0300

    drm/i915: call assert_device_not_suspended at gen6_force_wake_work

and despite the claims the WARN is still encountered in the wild today.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/i915: Disallow pin ioctl completely for kms drivers
Daniel Vetter [Mon, 24 Nov 2014 10:12:42 +0000 (11:12 +0100)]
drm/i915: Disallow pin ioctl completely for kms drivers

commit d472fcc8379c062bd56a3876fc6ef22258f14a91 upstream.

The problem here is that SNA pins batchbuffers to etch out a bit more
performance. Iirc it started out as a w/a for i830M (which we've
implemented in the kernel since a long time already). The problem is
that the pin ioctl wasn't added in

commit d23db88c3ab233daed18709e3a24d6c95344117f
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri May 23 08:48:08 2014 +0200

    drm/i915: Prevent negative relocation deltas from wrapping

Fix this by simply disallowing pinning from userspace so that the
kernel is in full control of batch placement again. Especially since
distros are moving towards running X as non-root, so most users won't
even be able to see any benefits.

UMS support is dead now, but we need this minimal patch for
backporting. Follow-up patch will remove the pin ioctl code
completely.

Note to backporters: You must have both

commit b45305fce5bb1abec263fcff9d81ebecd6306ede
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Mon Dec 17 16:21:27 2012 +0100

    drm/i915: Implement workaround for broken CS tlb on i830/845

which laned in 3.8 and

commit c4d69da167fa967749aeb70bc0e94a457e5d00c1
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Mon Sep 8 14:25:41 2014 +0100

    drm/i915: Evict CS TLBs between batches

which is also marked cc: stable. Otherwise this could introduce a
regression by disabling the userspace w/a without the kernel w/a being
fully functional on i830/45.

References: https://bugs.freedesktop.org/show_bug.cgi?id=76554#c116
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/i915: Don't complain about stolen conflicts on gen3
Daniel Vetter [Fri, 11 Apr 2014 13:55:17 +0000 (15:55 +0200)]
drm/i915: Don't complain about stolen conflicts on gen3

commit 0b6d24c01932db99fc95304235e751e7f7625c41 upstream.

Apparently stuff works that way on those machines.

I agree with Chris' concern that this is a bit risky but imo worth a
shot in -next just for fun. Afaics all these machines have the pci
resources allocated like that by the BIOS, so I suspect that it's all
ok.

This regression goes back to

commit eaba1b8f3379b5d100bd146b9a41d28348bdfd09
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Thu Jul 4 12:28:35 2013 +0100

    drm/i915: Verify that our stolen memory doesn't conflict

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76983
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71031
Tested-by: lu hua <huax.lu@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Tested-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/radeon: properly filter DP1.2 4k modes on non-DP1.2 hw
Alex Deucher [Wed, 10 Dec 2014 14:42:10 +0000 (09:42 -0500)]
drm/radeon: properly filter DP1.2 4k modes on non-DP1.2 hw

commit 410cce2a6b82299b46ff316c6384e789ce275ecb upstream.

The check was already in place in the dp mode_valid check, but
radeon_dp_get_dp_link_clock() never returned the high clock
mode_valid was checking for because that function clipped the
clock based on the hw capabilities.  Add an explicit check
in the mode_valid function.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=87172

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/radeon: adjust default bapm settings for KV
Alex Deucher [Mon, 15 Dec 2014 22:24:19 +0000 (17:24 -0500)]
drm/radeon: adjust default bapm settings for KV

commit 02ae7af53a451a1b0a51022c4693f5b339133e79 upstream.

Enabling bapm seems to cause clocking problems on some
KV configurations.  Disable it by default for now.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/radeon: fix sad_count check for dce3
Alex Deucher [Tue, 9 Dec 2014 15:04:01 +0000 (10:04 -0500)]
drm/radeon: fix sad_count check for dce3

commit 5665c3ebe5ee8a2c516925461f7214ba59c2e6d7 upstream.

Make it consistent with the sad code for other asics to deal
with monitors that don't report sads.

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=89461

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>