kernel/kernel-generic.git
10 years agox86, build, icc: Remove uninitialized_var() from compiler-intel.h
H. Peter Anvin [Tue, 10 Dec 2013 22:56:06 +0000 (14:56 -0800)]
x86, build, icc: Remove uninitialized_var() from compiler-intel.h

commit 503cf95c061a0551eb684da364509297efbe55d9 upstream.

When compiling with icc, <linux/compiler-gcc.h> ends up included
because the icc environment defines __GNUC__.  Thus, we neither need
nor want to have this macro defined in both compiler-gcc.h and
compiler-intel.h, and the fact that they are inconsistent just makes
the compiler spew warnings.

Reported-by: Sunil K. Pandey <sunil.k.pandey@intel.com>
Cc: Kevin B. Smith <kevin.b.smith@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/n/tip-0mbwou1zt7pafij09b897lg3@git.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agox86, build: Pass in additional -mno-mmx, -mno-sse options
H. Peter Anvin [Mon, 9 Dec 2013 23:43:38 +0000 (15:43 -0800)]
x86, build: Pass in additional -mno-mmx, -mno-sse options

commit 8b3b005d675726e38bc504d2e35a991e55819155 upstream.

In checkin

    5551a34e5aea x86-64, build: Always pass in -mno-sse

we unconditionally added -mno-sse to the main build, to keep newer
compilers from generating SSE instructions from autovectorization.
However, this did not extend to the special environments
(arch/x86/boot, arch/x86/boot/compressed, and arch/x86/realmode/rm).
Add -mno-sse to the compiler command line for these environments, and
add -mno-mmx to all the environments as well, as we don't want a
compiler to generate MMX code either.

This patch also removes a $(cc-option) call for -m32, since we have
long since stopped supporting compilers too old for the -m32 option,
and in fact hardcode it in other places in the Makefiles.

Reported-by: Kevin B. Smith <kevin.b.smith@intel.com>
Cc: Sunil K. Pandey <sunil.k.pandey@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: H. J. Lu <hjl.tools@gmail.com>
Link: http://lkml.kernel.org/n/tip-j21wzqv790q834n7yc6g80j1@git.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agox86/UV: Fix NULL pointer dereference in uv_flush_tlb_others() if the 'nobau' boot...
cpw [Tue, 3 Dec 2013 23:15:30 +0000 (17:15 -0600)]
x86/UV: Fix NULL pointer dereference in uv_flush_tlb_others() if the 'nobau' boot option is used

commit 3eae49ca8954f958b2001ab5643ef302cb7b67c7 upstream.

The SGI UV tlb shootdown code panics the system with a NULL
pointer deference if 'nobau' is specified on the boot
commandline.

uv_flush_tlb_other() gets called for every flush, whether the
BAU is disabled or not.  It should not be keeping the s_enters
statistic while the BAU is disabled.

The panic occurs because during initialization
init_per_cpu_tunables() does not set the bcp->statp pointer if
'nobau' was specified.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/E1VnzBi-0005yF-MU@eag09.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agox86, efi: Don't use (U)EFI time services on 32 bit
Matthew Garrett [Fri, 29 Nov 2013 19:44:43 +0000 (14:44 -0500)]
x86, efi: Don't use (U)EFI time services on 32 bit

commit 04bf9ba720fcc4fa313fa122b799ae0989b6cd50 upstream.

UEFI time services are often broken once we're in virtual mode. We were
already refusing to use them on 64-bit systems, but it turns out that
they're also broken on some 32-bit firmware, including the Dell Venue.
Disable them for now, we can revisit once we have the 1:1 mappings code
incorporated.

Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Link: http://lkml.kernel.org/r/1385754283-2464-1-git-send-email-matthew.garrett@nebula.com
Cc: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/radeon/atom: fix bus probes when hw_i2c is set (v2)
Alex Deucher [Tue, 3 Dec 2013 22:16:49 +0000 (17:16 -0500)]
drm/radeon/atom: fix bus probes when hw_i2c is set (v2)

commit ffd3d3361d583cb73fa65a5fed3a196ba6f261bb upstream.

When probing the bus, we need to set the byte count
to 0 rather than 1.

v2: Don't count the first byte.

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=66241

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/radeon: fixup bad vram size on SI
Alex Deucher [Tue, 3 Dec 2013 14:24:30 +0000 (09:24 -0500)]
drm/radeon: fixup bad vram size on SI

commit 0ca223b029a261e82fb2f50c52eb85d510f4260e upstream.

Some boards seem to have garbage in the upper
16 bits of the vram size register.  Check for
this and clamp the size properly.  Fixes
boards reporting bogus amounts of vram.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/radeon: program DCE2 audio dto just like DCE3
Alex Deucher [Mon, 25 Nov 2013 18:20:59 +0000 (13:20 -0500)]
drm/radeon: program DCE2 audio dto just like DCE3

commit 55d4e020fb8ddd3896a8cd3351028f5c3a2c4bd3 upstream.

Seems to work like the DCE3 version despite what
the register spec says.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=71975

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/radeon: fix typo in fetching mpll params
Alex Deucher [Thu, 21 Nov 2013 14:52:01 +0000 (09:52 -0500)]
drm/radeon: fix typo in fetching mpll params

commit 180f805f4f03b2894701f9831b4e96a308330b22 upstream.

Copy-paste typo.  Value should be 0-2, not 0-1.

Noticed-by: Sylvain BERTRAND <sylware@legeek.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/i915: use the correct force_wake function at the PC8 code
Paulo Zanoni [Thu, 21 Nov 2013 15:47:16 +0000 (13:47 -0200)]
drm/i915: use the correct force_wake function at the PC8 code

commit a1216444283e81fd904593a4a77c90adfe5d14d1 upstream.

When I submitted the first patch adding these force wake functions,
Chris Wilson observed that I was using the wrong functions, so I sent
a second version of the patch to correct this problem. The problem is
that v1 was merged instead of v2.

I was able to notice the problem when running the
debugfs-forcewake-user subtest of pm_pc8 from intel-gpu-tools.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoigb: Fix for issue where values could be too high for udelay function.
Carolyn Wyborny [Sat, 14 Dec 2013 11:26:46 +0000 (03:26 -0800)]
igb: Fix for issue where values could be too high for udelay function.

commit df29df92adda751ac04ca5149d30014b5199db81 upstream.

This patch changes the igb_phy_has_link function to check the value of the
parameter before deciding to use udelay or mdelay in order to be sure that
the value is not too high for udelay function.

Signed-off-by: Sunil K Pandey <sunil.k.pandey@intel.com>
Signed-off-by: Kevin B Smith <kevin.b.smith@intel.com>
Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@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 agonet: allwinner: emac: Add missing free_irq
Maxime Ripard [Tue, 10 Dec 2013 18:40:43 +0000 (19:40 +0100)]
net: allwinner: emac: Add missing free_irq

commit e9c56f8d2f851fb6d6ce6794c0f5463b862a878e upstream.

The sun4i-emac driver uses devm_request_irq at .ndo_open time, but relies on
the managed device mechanism to actually free it. This causes an issue whenever
someone wants to restart the interface, the interrupt still being held, and not
yet released.

Fall back to using the regular request_irq at .ndo_open time, and introduce a
free_irq during .ndo_stop.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agomwifiex: fix memory leak issue for ibss join
Ujjal Roy [Thu, 21 Nov 2013 19:08:56 +0000 (11:08 -0800)]
mwifiex: fix memory leak issue for ibss join

commit 517543fd72d577dde2ebd9505dc4abf26d589f9a upstream.

For IBSS join if the requested SSID matches current SSID,
it returns without freeing the allocated beacon IE buffer.

Signed-off-by: Ujjal Roy <royujjal@gmail.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiwlwifi: mvm: check sta_id/drain values in debugfs
Johannes Berg [Fri, 25 Oct 2013 11:06:06 +0000 (13:06 +0200)]
iwlwifi: mvm: check sta_id/drain values in debugfs

commit 60765a47a433d54e4744c285ad127f182dcd80aa upstream.

The station ID must be valid, if it's out of range then
the array access may crash. Validate the station ID to
the array length, and also validate the drain value even
if that doesn't matter all that much.

Fixes: 8ca151b568b6 ("iwlwifi: add the MVM driver")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agomac80211: don't attempt to reorder multicast frames
Johannes Berg [Wed, 20 Nov 2013 10:28:27 +0000 (11:28 +0100)]
mac80211: don't attempt to reorder multicast frames

commit 051a41fa4ee14f5c39668f0980973b9a195de560 upstream.

Multicast frames can't be transmitted as part of an aggregation
session (such a session couldn't even be set up) so don't try to
reorder them. Trying to do so would cause the reorder to stop
working correctly since multicast QoS frames (as transmitted by
the Aruba APs this was found with) would cause sequence number
confusion in the buffer.

Reported-by: Blaise Gassend <blaise@suitabletech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agomac80211: fix scheduled scan rtnl deadlock
Johannes Berg [Wed, 6 Nov 2013 09:34:36 +0000 (10:34 +0100)]
mac80211: fix scheduled scan rtnl deadlock

commit 18db594a1005d908d995a2fc8f5a7bf4286fdca0 upstream.

When changing cfg80211 to use RTNL locking, this caused a
deadlock in mac80211 as it calls cfg80211_sched_scan_stopped()
from a work item that's on a workqueue that is flushed with
the RTNL held.

Fix this by simply using schedule_work(), the work only needs
to finish running before the wiphy is unregistered, no other
synchronisation (e.g. with suspend) is really required since
for suspend userspace is already blocked anyway when we flush
the workqueue so will only pick up the event after resume.

Fixes: 5fe231e87372 ("cfg80211: vastly simplify locking")
Reported-and-tested-by: Eliad Peller <eliadx.peller@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoRevert "mac80211: allow disable power save in mesh"
Bob Copeland [Tue, 29 Oct 2013 22:11:59 +0000 (18:11 -0400)]
Revert "mac80211: allow disable power save in mesh"

commit 2d3db210860f1df099a35b1dd54cca35454e0361 upstream.

This reverts commit ee1f668136b2fb6640ee2d54c2a525ea41f98211.

The aformentioned commit added a check to allow
'iw wlan0 set power_save off' to work for mesh interfaces.

However, this is problematic because it also allows
'iw wlan0 set power_save on', which will crash in short order
because all of the subsequent code manipulates sdata->u.mgd.

The power-saving states for mesh interfaces can be manipulated
through the mesh config, e.g:
'iw wlan0 set mesh_param mesh_power_save=active' (which,
despite the name, actualy disables power saving since the
setting refers to the type of sleep the interface undergoes).

Fixes: ee1f668136b2 ("mac80211: allow disable power save in mesh")
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoselinux: handle TCP SYN-ACK packets correctly in selinux_ip_postroute()
Paul Moore [Wed, 4 Dec 2013 21:10:51 +0000 (16:10 -0500)]
selinux: handle TCP SYN-ACK packets correctly in selinux_ip_postroute()

commit 446b802437f285de68ffb8d6fac3c44c3cab5b04 upstream.

In selinux_ip_postroute() we perform access checks based on the
packet's security label.  For locally generated traffic we get the
packet's security label from the associated socket; this works in all
cases except for TCP SYN-ACK packets.  In the case of SYN-ACK packet's
the correct security label is stored in the connection's request_sock,
not the server's socket.  Unfortunately, at the point in time when
selinux_ip_postroute() is called we can't query the request_sock
directly, we need to recreate the label using the same logic that
originally labeled the associated request_sock.

See the inline comments for more explanation.

Reported-by: Janak Desai <Janak.Desai@gtri.gatech.edu>
Tested-by: Janak Desai <Janak.Desai@gtri.gatech.edu>
Signed-off-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoselinux: handle TCP SYN-ACK packets correctly in selinux_ip_output()
Paul Moore [Wed, 4 Dec 2013 21:10:45 +0000 (16:10 -0500)]
selinux: handle TCP SYN-ACK packets correctly in selinux_ip_output()

commit 47180068276a04ed31d24fe04c673138208b07a9 upstream.

In selinux_ip_output() we always label packets based on the parent
socket.  While this approach works in almost all cases, it doesn't
work in the case of TCP SYN-ACK packets when the correct label is not
the label of the parent socket, but rather the label of the larval
socket represented by the request_sock struct.

Unfortunately, since the request_sock isn't queued on the parent
socket until *after* the SYN-ACK packet is sent, we can't lookup the
request_sock to determine the correct label for the packet; at this
point in time the best we can do is simply pass/NF_ACCEPT the packet.
It must be said that simply passing the packet without any explicit
labeling action, while far from ideal, is not terrible as the SYN-ACK
packet will inherit any IP option based labeling from the initial
connection request so the label *should* be correct and all our
access controls remain in place so we shouldn't have to worry about
information leaks.

Reported-by: Janak Desai <Janak.Desai@gtri.gatech.edu>
Tested-by: Janak Desai <Janak.Desai@gtri.gatech.edu>
Signed-off-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agocfg80211: disable 5/10 MHz support for all drivers
Johannes Berg [Sun, 17 Nov 2013 09:37:34 +0000 (10:37 +0100)]
cfg80211: disable 5/10 MHz support for all drivers

commit 9f16d84ad73ea04145a5dc85c8f1067915b37eea upstream.

Due to nl80211 API breakage, 5/10 MHz support is broken for
all drivers. Fixing it requires adding new API, but that
can't be done as a bugfix commit since that would require
either updating all APIs in the trees needing the bugfix or
cause different kernels to have incompatible API.

Therefore, just disable 5/10 MHz support for all drivers.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoath9k: fix duration calculation for non-aggregated packets
Felix Fietkau [Thu, 5 Dec 2013 14:20:53 +0000 (15:20 +0100)]
ath9k: fix duration calculation for non-aggregated packets

commit bbf807bc0697e577c137a5fffb30fca7c6a45da1 upstream.

When not aggregating packets, fi->framelen should be passed in as length
to calculate the duration. Before the tx path rework, ath_tx_fill_desc
was called for either one aggregate, or one single frame, with the
length of the packet or the aggregate as a parameter.
After the rework, ath_tx_sched_aggr can pass a burst of single frames to
ath_tx_fill_desc and sets len=0.
Fix broken duration calculation by overriding the length in ath_tx_fill_desc
before passing it to ath_buf_set_rate.

Reported-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoath9k: Fix XLNA bias strength
Sujith Manoharan [Tue, 26 Nov 2013 01:51:39 +0000 (07:21 +0530)]
ath9k: Fix XLNA bias strength

commit a1783a7b0846fc6414483e6caf646db72023fffd upstream.

The EEPROM parameter to determine whether the bias
strength values for XLNA have to be applied is part
of the miscConfiguration field and not featureEnable.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoath9k: Fix QuickDrop usage
Sujith Manoharan [Tue, 26 Nov 2013 01:51:08 +0000 (07:21 +0530)]
ath9k: Fix QuickDrop usage

commit 93c1cfbe598f72cfa7be49e4a7d2a1d482e15119 upstream.

Bit 5 in the miscConfiguration field of the base EEPROM
header denotes whether QuickDrop is enabled or not. Fix
the incorrect usage of BIT(1) and also make sure that
this is done only for the required chips.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrm/i915: Fix pipe CSC post offset calculation
Ville Syrjälä [Thu, 28 Nov 2013 20:10:38 +0000 (22:10 +0200)]
drm/i915: Fix pipe CSC post offset calculation

commit 32cf0cb0294814cb1ee5d8727e9aac0e9aa80d2e upstream.

We were miscalculating the pipe CSC post offset for the full->limited
range conversion. The resulting post offset was double what it was
supposed to be, which caused blacks to come out grey when using
limited range output on HSW+.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71769
Tested-by: Lauri Mylläri <lauri.myllari@gmail.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiommu/arm-smmu: use mutex instead of spinlock for locking page tables
Will Deacon [Thu, 7 Nov 2013 18:47:50 +0000 (18:47 +0000)]
iommu/arm-smmu: use mutex instead of spinlock for locking page tables

commit a44a9791e778d9ccda50d5534028ed4057a9a45b upstream.

When creating IO mappings, we lazily allocate our page tables using the
standard, non-atomic allocator functions. This presents us with a
problem, since our page tables are protected with a spinlock.

This patch reworks the smmu_domain lock to use a mutex instead of a
spinlock. iova_to_phys is then reworked so that it only reads the page
tables, and can run in a lockless fashion, leaving the mutex to guard
against concurrent mapping threads.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoPartially revert "mtd: nand: pxa3xx: Introduce 'marvell,armada370-nand' compatible...
Ezequiel Garcia [Mon, 9 Dec 2013 21:36:26 +0000 (18:36 -0300)]
Partially revert "mtd: nand: pxa3xx: Introduce 'marvell,armada370-nand' compatible string"

commit 9c59ac616137fb62f6cb3f1219201b09cbcf30be upstream.

This partially reverts c0f3b8643a6fa2461d70760ec49d21d2b031d611.

The "armada370-nand" compatible support is not complete, and it was mistake
to add it. Revert it and postpone the support until the infrastructure is
in place.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoregulator: pfuze100: Fix address of FABID
Axel Lin [Mon, 9 Dec 2013 07:24:19 +0000 (15:24 +0800)]
regulator: pfuze100: Fix address of FABID

commit a1b6fa85c639ad0d5447d1a5e7d1463bbe29fcd3 upstream.

According to the datasheet, the address of FABID is 0x4. Fix it.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Robin Gong <b38343@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agomm: memcg: fix race condition between memcg teardown and swapin
Johannes Weiner [Fri, 13 Dec 2013 01:12:34 +0000 (17:12 -0800)]
mm: memcg: fix race condition between memcg teardown and swapin

commit 96f1c58d853497a757463e0b57fed140d6858f3a upstream.

There is a race condition between a memcg being torn down and a swapin
triggered from a different memcg of a page that was recorded to belong
to the exiting memcg on swapout (with CONFIG_MEMCG_SWAP extension).  The
result is unreclaimable pages pointing to dead memcgs, which can lead to
anything from endless loops in later memcg teardown (the page is charged
to all hierarchical parents but is not on any LRU list) or crashes from
following the dangling memcg pointer.

Memcgs with tasks in them can not be torn down and usually charges don't
show up in memcgs without tasks.  Swapin with the CONFIG_MEMCG_SWAP
extension is the notable exception because it charges the cgroup that
was recorded as owner during swapout, which may be empty and in the
process of being torn down when a task in another memcg triggers the
swapin:

  teardown:                 swapin:

                            lookup_swap_cgroup_id()
                            rcu_read_lock()
                            mem_cgroup_lookup()
                            css_tryget()
                            rcu_read_unlock()
  disable css_tryget()
  call_rcu()
    offline_css()
      reparent_charges()
                            res_counter_charge() (hierarchical!)
                            css_put()
                              css_free()
                            pc->mem_cgroup = dead memcg
                            add page to dead lru

Add a final reparenting step into css_free() to make sure any such raced
charges are moved out of the memcg before it's finally freed.

In the longer term it would be cleaner to have the css_tryget() and the
res_counter charge under the same RCU lock section so that the charge
reparenting is deferred until the last charge whose tryget succeeded is
visible.  But this will require more invasive changes that will be
harder to evaluate and backport into stable, so better defer them to a
separate change set.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agomm: memcg: do not allow task about to OOM kill to bypass the limit
Johannes Weiner [Fri, 13 Dec 2013 01:12:35 +0000 (17:12 -0800)]
mm: memcg: do not allow task about to OOM kill to bypass the limit

commit 1f14c1ac19aa45118054b6d5425873c5c7fc23a1 upstream.

Commit 4942642080ea ("mm: memcg: handle non-error OOM situations more
gracefully") allowed tasks that already entered a memcg OOM condition to
bypass the memcg limit on subsequent allocation attempts hoping this
would expedite finishing the page fault and executing the kill.

David Rientjes is worried that this breaks memcg isolation guarantees
and since there is no evidence that the bypass actually speeds up fault
processing just change it so that these subsequent charge attempts fail
outright.  The notable exception being __GFP_NOFAIL charges which are
required to bypass the limit regardless.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reported-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-bt: David Rientjes <rientjes@google.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agomm: memcg: do not declare OOM from __GFP_NOFAIL allocations
Johannes Weiner [Fri, 13 Dec 2013 01:12:20 +0000 (17:12 -0800)]
mm: memcg: do not declare OOM from __GFP_NOFAIL allocations

commit a0d8b00a3381f9d75764b3377590451cb0b4fe41 upstream.

Commit 84235de394d9 ("fs: buffer: move allocation failure loop into the
allocator") started recognizing __GFP_NOFAIL in memory cgroups but
forgot to disable the OOM killer.

Any task that does not fail allocation will also not enter the OOM
completion path.  So don't declare an OOM state in this case or it'll be
leaked and the task be able to bypass the limit until the next
userspace-triggered page fault cleans up the OOM state.

Reported-by: William Dauchy <wdauchy@gmail.com>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrivers/rtc/rtc-at91rm9200.c: correct alarm over day/month wrap
Linus Pizunski [Fri, 13 Dec 2013 01:12:23 +0000 (17:12 -0800)]
drivers/rtc/rtc-at91rm9200.c: correct alarm over day/month wrap

commit eb3c227289840eed95ddfb0516046f08d8993940 upstream.

Update month and day of month to the alarm month/day instead of current
day/month when setting the RTC alarm mask.

Signed-off-by: Linus Pizunski <linus@narrativeteam.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agopowerpc: Fix PTE page address mismatch in pgtable ctor/dtor
Hong H. Pham [Sat, 7 Dec 2013 14:06:33 +0000 (09:06 -0500)]
powerpc: Fix PTE page address mismatch in pgtable ctor/dtor

commit cf77ee54362a245f9a01f240adce03a06c05eb68 upstream.

In pte_alloc_one(), pgtable_page_ctor() is passed an address that has
not been converted by page_address() to the newly allocated PTE page.

When the PTE is freed, __pte_free_tlb() calls pgtable_page_dtor()
with an address to the PTE page that has been converted by page_address().
The mismatch in the PTE's page address causes pgtable_page_dtor() to access
invalid memory, so resources for that PTE (such as the page lock) is not
properly cleaned up.

On PPC32, only SMP kernels are affected.

On PPC64, only SMP kernels with 4K page size are affected.

This bug was introduced by commit d614bb041209fd7cb5e4b35e11a7b2f6ee8f62b8
"powerpc: Move the pte free routines from common header".

On a preempt-rt kernel, a spinlock is dynamically allocated for each
PTE in pgtable_page_ctor().  When the PTE is freed, calling
pgtable_page_dtor() with a mismatched page address causes a memory leak,
as the pointer to the PTE's spinlock is bogus.

On mainline, there isn't any immediately obvious symptoms, but the
problem still exists here.

Fixes: d614bb041209fd7c "powerpc: Move the pte free routes from common header"
Cc: Paul Mackerras <paulus@samba.org>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Hong H. Pham <hong.pham@windriver.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agomedia: af9035: fix broken I2C and USB I/O
Antti Palosaari [Wed, 27 Nov 2013 20:23:00 +0000 (17:23 -0300)]
media: af9035: fix broken I2C and USB I/O

commit 9323297dc0ea9141f8099e474657391bb3ad98f8 upstream.

There was three small buffer len calculation bugs which caused
driver non-working. These are coming from recent commit:
commit 7760e148350bf6df95662bc0db3734e9d991cb03
[media] af9035: Don't use dynamic static allocation

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoInput: usbtouchscreen - separate report and transmit buffer size handling
Christian Engelmayer [Wed, 27 Nov 2013 02:16:17 +0000 (18:16 -0800)]
Input: usbtouchscreen - separate report and transmit buffer size handling

commit 4ef38351d770cc421f4a0c7a849fd13207fc5741 upstream.

This patch supports the separate handling of the USB transfer buffer length
and the length of the buffer used for multi packet support. For devices
supporting multiple report or diagnostic packets, the USB transfer size is now
limited to the USB endpoints wMaxPacketSize - otherwise it defaults to the
configured report packet size as before.

This fixes an issue where event reporting can be delayed for an arbitrary
time for multi packet devices. For instance the report size for eGalax devices
is defined to the 16 byte maximum diagnostic packet size as opposed to the 5
byte report packet size. In case the driver requests 16 byte from the USB
interrupt endpoint, the USB host controller driver needs to split up the
request into 2 accesses according to the endpoints wMaxPacketSize of 8 byte.
When the first transfer is answered by the eGalax device with not less than
the full 8 byte requested, the host controller has got no way of knowing
whether the touch controller has got additional data queued and will issue
the second transfer. If per example a liftoff event finishes at such a
wMaxPacketSize boundary, the data will not be available to the usbtouch driver
until a further event is triggered and transfered to the host. From user
perspective the BTN_TOUCH release event in this case is stuck until the next
touch down event.

Signed-off-by: Christian Engelmayer <christian.engelmayer@frequentis.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoUSB: option: support new huawei devices
Fangxiaozhi (Franko) [Mon, 2 Dec 2013 09:00:11 +0000 (09:00 +0000)]
USB: option: support new huawei devices

commit 2bf308d7bc5e8cdd69672199f59532f35339133c upstream.

Add new supporting declarations to option.c, to support Huawei new
devices with new bInterfaceProtocol value.

Signed-off-by: fangxiaozhi <huananhu@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoUSB: serial: option: blacklist interface 1 for Huawei E173s-6
Gustavo Zacarias [Mon, 11 Nov 2013 12:59:15 +0000 (09:59 -0300)]
USB: serial: option: blacklist interface 1 for Huawei E173s-6

commit 8f173e22abf2258ddfa73f46eadbb6a6c29f1631 upstream.

Interface 1 on this device isn't for option to bind to otherwise an oops
on usb_wwan with log flooding will happen when accessing the port:

tty_release: ttyUSB1: read/write wait queue active!

It doesn't seem to respond to QMI if it's added to qmi_wwan so don't add
it there - it's likely used by the card reader.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agousb: musb: musb_cppi41: handle pre-mature TX complete interrupt
Sebastian Andrzej Siewior [Tue, 12 Nov 2013 15:37:47 +0000 (16:37 +0100)]
usb: musb: musb_cppi41: handle pre-mature TX complete interrupt

commit a655f481d83d6d37bec0a2ddfdd24c30ff8f541f upstream.

The TX-complete interrupt of the CPPI41 on AM335x fires too early.
Adding a loop and counting how long it takes until the
MUSB_TXCSR_TXPKTRDY bit is cleared I see
FS:
|musb-hdrc musb-hdrc.0.auto: configure ep1/80 packet_sz=64, mode=0, dma_addr=0xadc54002, len=1514 is_tx=1
|cppi41_dma_callback() 74 loops
|musb-hdrc musb-hdrc.0.auto: configure ep1/80 packet_sz=64, mode=0, dma_addr=0xadcd8802, len=1514 is_tx=1
|cppi41_dma_callback() 66 loops
|musb-hdrc musb-hdrc.0.auto: configure ep1/80 packet_sz=64, mode=0, dma_addr=0xadcd8002, len=1514 is_tx=1
|cppi41_dma_callback() 136 loops
|musb-hdrc musb-hdrc.0.auto: configure ep1/80 packet_sz=64, mode=0, dma_addr=0xadf55802, len=1514 is_tx=1
|cppi41_dma_callback() 136 loops

avg: 110 - 150us

HS:
|musb-hdrc musb-hdrc.0.auto: configure ep1/80 packet_sz=512, mode=0, dma_addr=0xaca6f002, len=1514 is_tx=1
|cppi41_dma_callback() 0 loops
|musb-hdrc musb-hdrc.0.auto: configure ep1/80 packet_sz=512, mode=0, dma_addr=0xadd6f802, len=1514 is_tx=1
|cppi41_dma_callback() 2 loops
|musb-hdrc musb-hdrc.0.auto: configure ep1/80 packet_sz=512, mode=0, dma_addr=0xadd6f002, len=1514 is_tx=1
|cppi41_dma_callback() 13 loops

avg: 2us

for the same test case. One loop means a udelay(1). The delay seems to
depend on the packet size. On HS the bit is always cleared for small
packet sizes while on FS it is never the case, it mostly around 110us.
This testing has been performed with g_ether (musb as device) and using BULK
transfers.

INTR transfers are way more fun: during init the gadget sends a INT
packet to the host and cppi41 says "transfer done" shortly after. The
MUSB_TXCSR_TXPKTRDY bit is set even seconds later. The reason is that the host
did not try to receive it, it does so after the interface (on host side) has
been configured. Until this happens, that packet remains in musb's FIFO.

To fix this, two things are done:
- No DMA transfers for INT based endpoints. These transfer are usually
  very small and rare so it is likely better to skip the DMA engine and
  stuff the four bytes directly into the FIFO
- on HS we poll up to 25us and hope that bit goes away. If not we setup
  a hrtimer to poll for it. The 140us delay is a rule of thumb. In FS
  the command
  | ping 10.10.10.10 -c1 -s65130
  creates about 44 1514bytes transfers. About 19 of them need a second
  timer to complete.

Reported-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agousb: musb: musb_cppi41: factor most of cppi41_dma_callback() into cppi41_trans_done()
Sebastian Andrzej Siewior [Tue, 12 Nov 2013 15:37:46 +0000 (16:37 +0100)]
usb: musb: musb_cppi41: factor most of cppi41_dma_callback() into cppi41_trans_done()

commit d373a8534d5e1e7a350e40d3c11961a7cd8d530b upstream.

This patch moves most of the logic in cppi41_dma_callback() into
cppi41_trans_done() where it can be called from another function.
Instead of computing "transferred" (the number of bytes transferred in
the last transaction) in cppi41_trans_done() the member
"cppi41_channel->prog_len" is now set to 0 if the transfer as a whole
can be considered as done. If it is != 0 then the next iteration is
assumed.
This is a preparation for a workaround.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agousb: xhci: Link TRB must not occur within a USB payload burst
David Laight [Mon, 11 Nov 2013 12:26:54 +0000 (12:26 +0000)]
usb: xhci: Link TRB must not occur within a USB payload burst

commit 35773dac5f862cb1c82ea151eba3e2f6de51ec3e upstream.

Section 4.11.7.1 of rev 1.0 of the xhci specification states that a link TRB
can only occur at a boundary between underlying USB frames (512 bytes for
high speed devices).

If this isn't done the USB frames aren't formatted correctly and, for example,
the USB3 ethernet ax88179_178a card will stop sending (while still receiving)
when running a netperf tcp transmit test with (say) and 8k buffer.

This should be a candidate for stable, the ax88179_178a driver defaults to
gso and tso enabled so it passes a lot of fragmented skb to the USB stack.

Notes from Sarah:

Discussion: http://marc.info/?l=linux-usb&m=138384509604981&w=2

This patch fixes a long-standing xHCI driver bug that was revealed by a
change in 3.12 in the usb-net driver.  Commit
638c5115a794981441246fa8fa5d95c1875af5ba "USBNET: support DMA SG" added
support to use bulk endpoint scatter-gather (urb->sg).  Only the USB
ethernet drivers trigger this bug, because the mass storage driver sends
sg list entries in page-sized chunks.

This patch only fixes the issue for bulk endpoint scatter-gather.  The
problem will still occur for periodic endpoints, because hosts will
interpret no-op transfers as a request to skip a service interval, which
is not what we want.

Luckily, the USB core isn't set up for scatter-gather on isochronous
endpoints, and no USB drivers use scatter-gather for interrupt
endpoints.  Document this known limitation so that developers won't try
to use urb->sg for interrupt endpoints until this issue is fixed.  The
more comprehensive fix would be to allow link TRBs in the middle of the
endpoint ring and revert this patch, but that fix would touch too much
code to be allowed in for stable.

This patch should be backported to kernels as old as 3.12, that contain
the commit 638c5115a794981441246fa8fa5d95c1875af5ba "USBNET: support DMA
SG".  Without this patch, the USB network device gets wedged, and stops
sending packets.  Mark Lord confirms this patch fixes the regression:

http://marc.info/?l=linux-netdev&m=138487107625966&w=2

Signed-off-by: David Laight <david.laight@aculab.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Tested-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agousb: gadget: composite: reset delayed_status on reset_config
Michael Grzeschik [Mon, 11 Nov 2013 22:43:32 +0000 (23:43 +0100)]
usb: gadget: composite: reset delayed_status on reset_config

commit 2bac51a1827a18821150ed8c9f9752c02f9c2b02 upstream.

The delayed_status value is used to keep track of status response
packets on ep0. It needs to be reset or the set_config function would
still delay the answer, if the usb device got unplugged while waiting
for setup_continue to be called.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agousb: dwc3: fix implementation of endpoint wedge
Alan Stern [Fri, 1 Nov 2013 16:05:12 +0000 (12:05 -0400)]
usb: dwc3: fix implementation of endpoint wedge

commit a535d81c92615b8ffb99b7e1fd1fb01effaed1af upstream.

The dwc3 UDC driver doesn't implement endpoint wedging correctly.
When an endpoint is wedged, the gadget driver should be allowed to
clear the wedge by calling usb_ep_clear_halt().  Only the host is
prevented from resetting the endpoint.

This patch fixes the implementation.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agousb: hub: Use correct reset for wedged USB3 devices that are NOTATTACHED
Julius Werner [Thu, 7 Nov 2013 18:59:14 +0000 (10:59 -0800)]
usb: hub: Use correct reset for wedged USB3 devices that are NOTATTACHED

commit 2d51f3cd11f414c56a87dc018196b85fd50b04a4 upstream.

This patch adds a check for USB_STATE_NOTATTACHED to the
hub_port_warm_reset_required() workaround for ports that end up in
Compliance Mode in hub_events() when trying to decide which reset
function to use. Trying to call usb_reset_device() with a NOTATTACHED
device will just fail and leave the port broken.

Signed-off-by: Julius Werner <jwerner@chromium.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agonfsd: when reusing an existing repcache entry, unhash it first
Jeff Layton [Mon, 2 Dec 2013 20:26:19 +0000 (15:26 -0500)]
nfsd: when reusing an existing repcache entry, unhash it first

commit 781c2a5a5f75eacc04663aced0f0f1a648d4f308 upstream.

The DRC code will attempt to reuse an existing, expired cache entry in
preference to allocating a new one. It'll then search the cache, and if
it gets a hit it'll then free the cache entry that it was going to
reuse.

The cache code doesn't unhash the entry that it's going to reuse
however, so it's possible for it end up designating an entry for reuse
and then subsequently freeing the same entry after it finds it.  This
leads it to a later use-after-free situation and usually some list
corruption warnings or an oops.

Fix this by simply unhashing the entry that we intend to reuse. That
will mean that it's not findable via a search and should prevent this
situation from occurring.

Reported-by: Christoph Hellwig <hch@infradead.org>
Reported-by: g. artim <gartim@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agofutex: fix handling of read-only-mapped hugepages
Linus Torvalds [Thu, 12 Dec 2013 17:38:42 +0000 (09:38 -0800)]
futex: fix handling of read-only-mapped hugepages

commit f12d5bfceb7e1f9051563381ec047f7f13956c3c upstream.

The hugepage code had the exact same bug that regular pages had in
commit 7485d0d3758e ("futexes: Remove rw parameter from
get_futex_key()").

The regular page case was fixed by commit 9ea71503a8ed ("futex: Fix
regression with read only mappings"), but the transparent hugepage case
(added in a5b338f2b0b1: "thp: update futex compound knowledge") case
remained broken.

Found by Dave Jones and his trinity tool.

Reported-and-tested-by: Dave Jones <davej@fedoraproject.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Darren Hart <dvhart@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoPCI: Disable Bus Master only on kexec reboot
Khalid Aziz [Wed, 27 Nov 2013 22:19:25 +0000 (15:19 -0700)]
PCI: Disable Bus Master only on kexec reboot

commit 4fc9bbf98fd66f879e628d8537ba7c240be2b58e upstream.

Add a flag to tell the PCI subsystem that kernel is shutting down in
preparation to kexec a kernel.  Add code in PCI subsystem to use this flag
to clear Bus Master bit on PCI devices only in case of kexec reboot.

This fixes a power-off problem on Acer Aspire V5-573G and likely other
machines and avoids any other issues caused by clearing Bus Master bit on
PCI devices in normal shutdown path.  The problem was introduced by
b566a22c2332 ("PCI: disable Bus Master on PCI device shutdown").

This patch is based on discussion at
http://marc.info/?l=linux-pci&m=138425645204355&w=2

Link: https://bugzilla.kernel.org/show_bug.cgi?id=63861
Reported-by: Chang Liu <cl91tp@gmail.com>
Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Konstantin Khlebnikov <koct9i@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiwlwifi: pcie: fix interrupt coalescing for 7260 / 3160
Emmanuel Grumbach [Mon, 11 Nov 2013 13:23:01 +0000 (15:23 +0200)]
iwlwifi: pcie: fix interrupt coalescing for 7260 / 3160

commit 6960a059b2c618f32fe549f13287b3d2278c09e9 upstream.

We changed the timeout for the interrupt coealescing for
calibration, but that wasn't effective since we changed
that value back before loading the firmware. Since
calibrations are notification from firmware and not Rx
packets, this doesn't change anyway - the firmware will
fire an interrupt straight away regardless of the interrupt
coalescing value.
Also, a HW issue has been discovered in 7000 devices series.
The work around is to disable the new interrupt coalescing
timeout feature - do this by setting bit 31 in
CSR_INT_COALESCING.
This has been fixed in 7265 which means that we can't rely
on the device family and must have a hint in the iwl_cfg
structure.

Fixes: 99cd47142399 ("iwlwifi: add 7000 series device configuration")
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoxfs: underflow bug in xfs_attrlist_by_handle()
Dan Carpenter [Thu, 31 Oct 2013 18:00:10 +0000 (21:00 +0300)]
xfs: underflow bug in xfs_attrlist_by_handle()

commit 31978b5cc66b8ba8a7e8eef60b12395d41b7b890 upstream.

If we allocate less than sizeof(struct attrlist) then we end up
corrupting memory or doing a ZERO_PTR_SIZE dereference.

This can only be triggered with CAP_SYS_ADMIN.

Reported-by: Nico Golde <nico@ngolde.de>
Reported-by: Fabian Yamaguchi <fabs@goesec.de>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoxfs: growfs overruns AGFL buffer on V4 filesystems
Dave Chinner [Thu, 21 Nov 2013 04:41:06 +0000 (15:41 +1100)]
xfs: growfs overruns AGFL buffer on V4 filesystems

commit f94c44573e7c22860e2c3dfe349c45f72ba35ad3 upstream.

This loop in xfs_growfs_data_private() is incorrect for V4
superblocks filesystems:

for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++)
agfl->agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);

For V4 filesystems, we don't have a agfl header structure, and so
XFS_AGFL_SIZE() returns an entire sector's worth of entries, which
we then index from an offset into the sector. Hence: buffer overrun.

This problem was introduced in 3.10 by commit 77c95bba ("xfs: add
CRC checks to the AGFL") which changed the AGFL structure but failed
to update the growfs code to handle the different structures.

Fix it by using the correct offset into the buffer for both V4 and
V5 filesystems.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agohwmon: (w83l768ng) Fix fan speed control range
Jean Delvare [Thu, 12 Dec 2013 07:05:32 +0000 (08:05 +0100)]
hwmon: (w83l768ng) Fix fan speed control range

commit 33a7ab91d509fa33b4bcd3ce0038cc80298050da upstream.

The W83L786NG stores the fan speed on 4 bits while the sysfs interface
uses a 0-255 range. Thus the driver should scale the user input down
to map it to the device range, and scale up the value read from the
device before presenting it to the user. The reserved register nibble
should be left unchanged.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agohwmon: (w83l786ng) Fix fan speed control mode setting and reporting
Brian Carnes [Thu, 12 Dec 2013 07:05:32 +0000 (08:05 +0100)]
hwmon: (w83l786ng) Fix fan speed control mode setting and reporting

commit cf7559bc053471f32373d71d04a9aa19e0b48d59 upstream.

The wrong mask is used, which causes some fan speed control modes
(pwmX_enable) to be incorrectly reported, and some modes to be
impossible to set.

[JD: add subject and description.]

Signed-off-by: Brian Carnes <bmcarnes@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agohwmon: HIH-6130: Support I2C bus drivers without I2C_FUNC_SMBUS_QUICK
José Miguel Gonçalves [Wed, 11 Dec 2013 11:11:13 +0000 (11:11 +0000)]
hwmon: HIH-6130: Support I2C bus drivers without I2C_FUNC_SMBUS_QUICK

commit efabcc2123f0ed47870033b8d6fc73b50d76d635 upstream.

Some I2C bus drivers do not allow zero-length data transfers which are
required to start a measurement with the HIH6130/1 sensor. Nevertheless,
we can overcome this limitation by writing a zero dummy byte. This byte
is ignored by the sensor and was verified to be working with the OMAP
I2C bus driver in a BeagleBone board.

Signed-off-by: José Miguel Gonçalves <jose.goncalves@inov.pt>
[Guenter Roeck: Simplified complexity of write_length initialization]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agohwmon: Prevent some divide by zeros in FAN_TO_REG()
Dan Carpenter [Thu, 12 Dec 2013 07:05:33 +0000 (08:05 +0100)]
hwmon: Prevent some divide by zeros in FAN_TO_REG()

commit 3806b45ba4655147a011df03242cc197ab986c43 upstream.

The "rpm * div" operations can overflow here, so this patch adds an
upper limit to rpm to prevent that.  Jean Delvare helped me with this
patch.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Roger Lucas <vt8231@hiddenengine.co.uk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoKVM: x86: fix guest-initiated crash with x2apic (CVE-2013-6376)
Gleb Natapov [Thu, 12 Dec 2013 20:20:08 +0000 (21:20 +0100)]
KVM: x86: fix guest-initiated crash with x2apic (CVE-2013-6376)

commit 17d68b763f09a9ce824ae23eb62c9efc57b69271 upstream.

A guest can cause a BUG_ON() leading to a host kernel crash.
When the guest writes to the ICR to request an IPI, while in x2apic
mode the following things happen, the destination is read from
ICR2, which is a register that the guest can control.

kvm_irq_delivery_to_apic_fast uses the high 16 bits of ICR2 as the
cluster id.  A BUG_ON is triggered, which is a protection against
accessing map->logical_map with an out-of-bounds access and manages
to avoid that anything really unsafe occurs.

The logic in the code is correct from real HW point of view. The problem
is that KVM supports only one cluster with ID 0 in clustered mode, but
the code that has the bug does not take this into account.

Reported-by: Lars Bull <larsbull@google.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoKVM: x86: Convert vapic synchronization to _cached functions (CVE-2013-6368)
Andy Honig [Wed, 20 Nov 2013 18:23:22 +0000 (10:23 -0800)]
KVM: x86: Convert vapic synchronization to _cached functions (CVE-2013-6368)

commit fda4e2e85589191b123d31cdc21fd33ee70f50fd upstream.

In kvm_lapic_sync_from_vapic and kvm_lapic_sync_to_vapic there is the
potential to corrupt kernel memory if userspace provides an address that
is at the end of a page.  This patches concerts those functions to use
kvm_write_guest_cached and kvm_read_guest_cached.  It also checks the
vapic_address specified by userspace during ioctl processing and returns
an error to userspace if the address is not a valid GPA.

This is generally not guest triggerable, because the required write is
done by firmware that runs before the guest.  Also, it only affects AMD
processors and oldish Intel that do not have the FlexPriority feature
(unless you disable FlexPriority, of course; then newer processors are
also affected).

Fixes: b93463aa59d6 ('KVM: Accelerated apic support')

Reported-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoKVM: x86: Fix potential divide by 0 in lapic (CVE-2013-6367)
Andy Honig [Tue, 19 Nov 2013 22:12:18 +0000 (14:12 -0800)]
KVM: x86: Fix potential divide by 0 in lapic (CVE-2013-6367)

commit b963a22e6d1a266a67e9eecc88134713fd54775c upstream.

Under guest controllable circumstances apic_get_tmcct will execute a
divide by zero and cause a crash.  If the guest cpuid support
tsc deadline timers and performs the following sequence of requests
the host will crash.
- Set the mode to periodic
- Set the TMICT to 0
- Set the mode bits to 11 (neither periodic, nor one shot, nor tsc deadline)
- Set the TMICT to non-zero.
Then the lapic_timer.period will be 0, but the TMICT will not be.  If the
guest then reads from the TMCCT then the host will perform a divide by 0.

This patch ensures that if the lapic_timer.period is 0, then the division
does not occur.

Reported-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoKVM: Improve create VCPU parameter (CVE-2013-4587)
Andy Honig [Tue, 19 Nov 2013 00:09:22 +0000 (16:09 -0800)]
KVM: Improve create VCPU parameter (CVE-2013-4587)

commit 338c7dbadd2671189cec7faf64c84d01071b3f96 upstream.

In multiple functions the vcpu_id is used as an offset into a bitfield.  Ag
malicious user could specify a vcpu_id greater than 255 in order to set or
clear bits in kernel memory.  This could be used to elevate priveges in the
kernel.  This patch verifies that the vcpu_id provided is less than 255.
The api documentation already specifies that the vcpu_id must be less than
max_vcpus, but this is currently not checked.

Reported-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoARM: 7917/1: cacheflush: correctly limit range of memory region being flushed
Jon Medhurst [Mon, 9 Dec 2013 12:45:46 +0000 (13:45 +0100)]
ARM: 7917/1: cacheflush: correctly limit range of memory region being flushed

commit b31459adeab018b297541e288ac88873011da82a upstream.

The __do_cache_op function operates with a 'chunk' size of one page
but fails to limit the size of the final chunk so as to not exceed
the specified memory region. Fix this.

Reported-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Tested-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoARM: 7913/1: fix framepointer check in unwind_frame
Konstantin Khlebnikov [Thu, 5 Dec 2013 13:23:48 +0000 (14:23 +0100)]
ARM: 7913/1: fix framepointer check in unwind_frame

commit 3abb6671a9c04479c4bd026798a05f857393b7e2 upstream.

This patch fixes corner case when (fp + 4) overflows unsigned long,
for example: fp = 0xFFFFFFFF -> fp + 4 == 3.

Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoARM: 7912/1: check stack pointer in get_wchan
Konstantin Khlebnikov [Thu, 5 Dec 2013 13:21:36 +0000 (14:21 +0100)]
ARM: 7912/1: check stack pointer in get_wchan

commit 1b15ec7a7427d4188ba91b9bbac696250a059d22 upstream.

get_wchan() is lockless. Task may wakeup at any time and change its own stack,
thus each next stack frame may be overwritten and filled with random stuff.

/proc/$pid/stack interface had been disabled for non-current tasks, see [1]
But 'wchan' still allows to trigger stack frame unwinding on volatile stack.

This patch fixes oops in unwind_frame() by adding stack pointer validation on
each step (as x86 code do), unwind_frame() already checks frame pointer.

Also I've found another report of this oops on stackoverflow (irony).

Link: http://www.spinics.net/lists/arm-kernel/msg110589.html
Link: http://stackoverflow.com/questions/18479894/unwind-frame-cause-a-kernel-paging-error
Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoARM: OMAP3: hwmod data: Don't prevent RESET of USB Host module
Roger Quadros [Mon, 9 Dec 2013 01:39:02 +0000 (18:39 -0700)]
ARM: OMAP3: hwmod data: Don't prevent RESET of USB Host module

commit 7f4d3641e2548d1ac5dee837ff434df668a2810c upstream.

Unlike what the comment states, errata i660 does not state that we
can't RESET the USB host module. Instead it states that RESET is the
only way to recover from a deadlock situation.

RESET ensures that the module is in a known good state irrespective
of what bootloader does with the module, so it must be done at boot.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ti.com> # Panda, BeagleXM
Fixes: de231388cb80 ("ARM: OMAP: USB: EHCI and OHCI hwmod structures for OMAP3")
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoARM: pxa: prevent PXA270 occasional reboot freezes
Sergei Ianovich [Tue, 10 Dec 2013 04:39:15 +0000 (08:39 +0400)]
ARM: pxa: prevent PXA270 occasional reboot freezes

commit ff88b4724fde18056a4c539f7327389aec0f4c2d upstream.

Erratum 71 of PXA270M Processor Family Specification Update
(April 19, 2010) explains that watchdog reset time is just
8us insead of 10ms in EMTS.

If SDRAM is not reset, it causes memory bus congestion and
the device hangs. We put SDRAM in selfresh mode before watchdog
reset, removing potential freezes.

Without this patch PXA270-based ICP DAS LP-8x4x hangs after up to 40
reboots. With this patch it has successfully rebooted 500 times.

Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoARM: sun6i: dt: Fix interrupt trigger types
Maxime Ripard [Tue, 10 Dec 2013 18:37:22 +0000 (19:37 +0100)]
ARM: sun6i: dt: Fix interrupt trigger types

commit 6f97dc8d4663abed96fa30e3ea4a1d4cfd1c4276 upstream.

The Allwinner A31 uses the ARM GIC as its internal interrupts controller. The
GIC can work on several interrupt triggers, and the A31 was actually setting it
up to use a rising edge as a trigger, while it was actually a level high
trigger, leading to some interrupts that would be completely ignored if the
edge was missed.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoARM: highbank: handle soft poweroff and reset key events
Rob Herring [Wed, 4 Dec 2013 17:05:17 +0000 (11:05 -0600)]
ARM: highbank: handle soft poweroff and reset key events

commit 3843114856728075d0a80e7151197c19fb3a9e08 upstream.

Graceful reboot and poweroff via IPMI commands to the management
processor don't work. Power and reset keys are events from the
management processor which are generated via IPC messages. Passing
the keys to userspace does not work as neither acpid nor a desktop
environment are present.

This adds a notifier handler for the IPC messages so the kernel can
handle the key events directly and IPMI graceful shutdown will work.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoARM: pxa: tosa: fix keys mapping
Dmitry Eremin-Solenikov [Sat, 16 Nov 2013 12:47:50 +0000 (16:47 +0400)]
ARM: pxa: tosa: fix keys mapping

commit 506cac15ac86f204b83e3cfccde73eeb4e7c5f34 upstream.

When converting from tosa-keyboard driver to matrix keyboard, tosa keys
received extra 1 column shift. Replace that with correct values to make
keyboard work again.

Fixes: f69a6548c9d5 ('[ARM] pxa/tosa: make use of the matrix keypad driver')
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoALSA: hda - hdmi: Fix IEC958 ctl indexes for some simple HDMI devices
Anssi Hannula [Tue, 10 Dec 2013 20:46:34 +0000 (22:46 +0200)]
ALSA: hda - hdmi: Fix IEC958 ctl indexes for some simple HDMI devices

commit c9a6338aecdb92f9d015ecc26d203e54250bebbb upstream.

In case a single HDA card has both HDMI and S/PDIF outputs, the S/PDIF
outputs will have their IEC958 controls created starting from index 16
and the HDMI controls will be created starting from index 0.

However, HDMI simple_playback_build_controls() as used by old VIA and
NVIDIA codecs incorrectly requests the IEC958 controls to be created
with an S/PDIF type instead of HDMI.
In case the card has other codecs that have HDMI outputs, the controls
will be created with wrong index=16, causing them to e.g. be unreachable
by the ALSA "hdmi" alias.

Fix that by making simple_playback_build_controls() request controls
with HDMI indexes.

Not many cards have an affected configuration, but e.g. ASUS M3N78-VM
contains an integrated NVIDIA HDA "card" with:
- a VIA codec that has, among others, an S/PDIF pin incorrectly
  labelled as an HDMI pin, and
- an NVIDIA MCP7x HDMI codec.

Reported-by: MysterX on #openelec
Tested-by: MysterX on #openelec
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoALSA: hda - Mute all aamix inputs as default
Takashi Iwai [Tue, 10 Dec 2013 16:33:49 +0000 (17:33 +0100)]
ALSA: hda - Mute all aamix inputs as default

commit ebb93c057dda376414fbc499ad6ace9b527dff5a upstream.

Not all channels have been initialized, so far, especially when aamix
NID itself doesn't have amps but its leaves have.  This patch fixes
these holes.  Otherwise you might get unexpected loopback inputs,
e.g. from surround channels.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoALSA: hda - Add static DAC/pin mapping for AD1986A codec
Takashi Iwai [Tue, 10 Dec 2013 16:29:26 +0000 (17:29 +0100)]
ALSA: hda - Add static DAC/pin mapping for AD1986A codec

commit 3690739b013504d33fe9348dd45f6b126aa370fb upstream.

AD1986A codec is a pretty old codec and has really many hidden
restrictions.  One of such is that each DAC is dedicated to certain
pin although there are possible connections.  Currently, the generic
parser tries to assign individual DACs as much as possible, and this
lead to two bad situations: connections where the sound actually
doesn't work, and connections conflicting other channels.

We may fix this by trying to find the best connections more harder,
but as of now, it's easier to give some hints for paired DAC/pin
connections and honor them if available, since such a hint is needed
only for specific codecs (right now only AD1986A, and there will be
unlikely any others in future).

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=64971
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=66621
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoALSA: memalloc.h - fix wrong truncation of dma_addr_t
Stefano Panella [Tue, 10 Dec 2013 14:20:28 +0000 (14:20 +0000)]
ALSA: memalloc.h - fix wrong truncation of dma_addr_t

commit 932e9dec380c67ec15ac3eb073bb55797d8b4801 upstream.

When running a 32bit kernel the hda_intel driver is still reporting
a 64bit dma_mask if the HW supports it.

From sound/pci/hda/hda_intel.c:

        /* allow 64bit DMA address if supported by H/W */
        if ((gcap & ICH6_GCAP_64OK) && !pci_set_dma_mask(pci, DMA_BIT_MASK(64)))
                pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(64));
        else {
                pci_set_dma_mask(pci, DMA_BIT_MASK(32));
                pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32));
        }

which means when there is a call to dma_alloc_coherent from
snd_malloc_dev_pages a machine address bigger than 32bit can be returned.
This can be true in particular if running  the 32bit kernel as a pv dom0
under the Xen Hypervisor or PAE on bare metal.

The problem is that when calling setup_bdle to program the BLE the
dma_addr_t returned from the dma_alloc_coherent is wrongly truncated
from snd_sgbuf_get_addr if running a 32bit kernel:

static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab,
                                           size_t offset)
{
        struct snd_sg_buf *sgbuf = dmab->private_data;
        dma_addr_t addr = sgbuf->table[offset >> PAGE_SHIFT].addr;
        addr &= PAGE_MASK;
        return addr + offset % PAGE_SIZE;
}

where PAGE_MASK in a 32bit kernel is zeroing the upper 32bit af addr.

Without this patch the HW will fetch the 32bit truncated address,
which is not the one obtained from dma_alloc_coherent and will result
to a non working audio but can corrupt host memory at a random location.

The current patch apply to v3.13-rc3-74-g6c843f5

Signed-off-by: Stefano Panella <stefano.panella@citrix.com>
Reviewed-by: Frediano Ziglio <frediano.ziglio@citrix.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoALSA: compress: Fix 64bit ABI incompatibility
Takashi Iwai [Tue, 10 Dec 2013 11:15:52 +0000 (12:15 +0100)]
ALSA: compress: Fix 64bit ABI incompatibility

commit 6733cf572a9e20db2b7580a5dd39d5782d571eec upstream.

snd_pcm_uframes_t is defined as unsigned long so it would take
different sizes depending on 32 or 64bit architectures.  As we don't
want this ABI incompatibility, and there is no real 64bit user yet,
let's make it the fixed size with __u32.

Also bump the protocol version number to 0.1.2.

Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoudl: fix issue with imported prime buffers
Rob Clark [Wed, 4 Dec 2013 13:45:43 +0000 (08:45 -0500)]
udl: fix issue with imported prime buffers

commit 1d507b3af40a60e03a3bbc4c897fc2709c075d24 upstream.

5dc9e1e8 was a bit over-ambitious, and accidentially removed handling
for imported prime buffers.

Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Cc: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoarm64: mm: Fix PMD_SECT_PROT_NONE definition
Steve Capper [Thu, 5 Dec 2013 12:04:51 +0000 (12:04 +0000)]
arm64: mm: Fix PMD_SECT_PROT_NONE definition

commit db4ed53cfe9f5a00355891a631d47dfa3fd4541f upstream.

Modify the value of PMD_SECT_PROT_NONE to match that of PTE_NONE. This
should have been in commit 3676f9ef5481 (Move PTE_PROT_NONE higher up).

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoLinux 3.12.5 v3.12.5
Greg Kroah-Hartman [Thu, 12 Dec 2013 06:38:07 +0000 (22:38 -0800)]
Linux 3.12.5

10 years agocrypto: scatterwalk - Use sg_chain_ptr on chain entries
Tom Lendacky [Thu, 5 Dec 2013 19:09:53 +0000 (13:09 -0600)]
crypto: scatterwalk - Use sg_chain_ptr on chain entries

commit 389a5390583a18e45bc4abd4439291abec5e7a63 upstream.

Now that scatterwalk_sg_chain sets the chain pointer bit the sg_page
call in scatterwalk_sg_next hits a BUG_ON when CONFIG_DEBUG_SG is
enabled. Use sg_chain_ptr instead of sg_page on a chain entry.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agodrivers/char/i8k.c: add Dell XPLS L421X
Alan Cox [Tue, 3 Dec 2013 21:56:56 +0000 (13:56 -0800)]
drivers/char/i8k.c: add Dell XPLS L421X

commit 9aa5b0181bdf335f0b731d8502e128a862884bcd upstream.

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=60772

Signed-off-by: Alan Cox <alan@linux.intel.com>
Reported-by: Leho Kraav <leho@kraav.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoUSB: cdc-acm: Added support for the Lenovo RD02-D400 USB Modem
David Cluytens [Tue, 3 Dec 2013 13:18:57 +0000 (14:18 +0100)]
USB: cdc-acm: Added support for the Lenovo RD02-D400 USB Modem

commit 3b59d16c513da258ec8f6a0b4db85f257a0380d6 upstream.

Signed-off-by: David Cluytens <david.cluytens@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoUSB: spcp8x5: correct handling of CS5 setting
Colin Leitner [Fri, 8 Nov 2013 21:53:11 +0000 (22:53 +0100)]
USB: spcp8x5: correct handling of CS5 setting

commit 711fbdfbf2bc4827214a650afe3f64767a1aba16 upstream.

This patch removes an erroneous check of CSIZE, which made it impossible to set
CS5.

Compiles clean, but couldn't test against hardware.

Signed-off-by: Colin Leitner <colin.leitner@gmail.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoUSB: mos7840: correct handling of CS5 setting
Colin Leitner [Fri, 8 Nov 2013 21:52:34 +0000 (22:52 +0100)]
USB: mos7840: correct handling of CS5 setting

commit 78692cc3382e0603a47e1f2aaeffe0d99891994d upstream.

This patch removes an erroneous check of CSIZE, which made it impossible to set
CS5.

Compiles clean, but couldn't test against hardware.

Signed-off-by: Colin Leitner <colin.leitner@gmail.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoUSB: ftdi_sio: fixed handling of unsupported CSIZE setting
Colin Leitner [Tue, 5 Nov 2013 17:02:34 +0000 (18:02 +0100)]
USB: ftdi_sio: fixed handling of unsupported CSIZE setting

commit 8704211f65a2106ba01b6ac9727cdaf9ca11594c upstream.

FTDI UARTs support only 7 or 8 data bits. Until now the ftdi_sio driver would
only report this limitation for CS6 to dmesg and fail to reflect this fact to
tcgetattr.

This patch reverts the unsupported CSIZE setting and reports the fact with less
severance to dmesg for both CS5 and CS6.

To test the patch it's sufficient to call

    stty -F /dev/ttyUSB0 cs5

which will succeed without the patch and report an error with the patch
applied.

As an additional fix this patch ensures that the control request will always
include a data bit size.

Signed-off-by: Colin Leitner <colin.leitner@gmail.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoUSB: pl2303: fixed handling of CS5 setting
Colin Leitner [Mon, 4 Nov 2013 18:40:43 +0000 (19:40 +0100)]
USB: pl2303: fixed handling of CS5 setting

commit a313249937820f8b1996133fc285efbd6aad2c5b upstream.

This patch fixes the CS5 setting on the PL2303 USB-to-serial devices. CS5 has a
value of 0 and the CSIZE setting has been skipped altogether by the enclosing
if. Tested on 3.11.6 and the scope shows the correct output after the fix has
been applied.

Tagged to be added to stable, because it fixes a user visible driver bug and is
simple enough to backport easily.

Signed-off-by: Colin Leitner <colin.leitner@gmail.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agon_tty: Fix missing newline echo
Peter Hurley [Fri, 29 Nov 2013 17:56:10 +0000 (12:56 -0500)]
n_tty: Fix missing newline echo

commit 39434abd942c8e4b9c14c06a03b3245beaf8467f upstream.

When L_ECHONL is on, newlines are echoed regardless of the L_ECHO
state; if set, ensure accumulated echoes are flushed before finishing
the current input processing and before more output.

Reported-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com
Tested-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agomei: add 9 series PCH mei device ids
Tomas Winkler [Thu, 5 Dec 2013 07:34:44 +0000 (09:34 +0200)]
mei: add 9 series PCH mei device ids

commit 76a9635979e543f04a5885198e68ff28e3311b67 upstream.

And Lynx Point H Refresh and Wildcat Point LP
device ids.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agomei: me: add Lynx Point Wellsburg work station device id
Tomas Winkler [Wed, 16 Oct 2013 09:09:43 +0000 (12:09 +0300)]
mei: me: add Lynx Point Wellsburg work station device id

commit 838b3a6d62413b336f3dde15ecff161070358957 upstream.

add missing device id for LPT based work station

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoInput: mousedev - allow disabling even without CONFIG_EXPERT
Tom Gundersen [Thu, 31 Oct 2013 07:44:49 +0000 (00:44 -0700)]
Input: mousedev - allow disabling even without CONFIG_EXPERT

commit dfaaed08ecc01bd513248ba7999daf50ce028352 upstream.

Moust (if not all) modern software, including X, uses /dev/eventX rather than
the legacy /dev/mouseX devices. It therefore makes sense for general-purpose
(distro) kernels to use MOUSEDV=m (or even n), so let's drop the EXPERT=y
requirement.

Signed-off-by: Tom Gundersen <teg@jklm.no>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoInput: allow deselecting serio drivers even without CONFIG_EXPERT
Tom Gundersen [Thu, 31 Oct 2013 07:38:30 +0000 (00:38 -0700)]
Input: allow deselecting serio drivers even without CONFIG_EXPERT

commit bcd2623073e98f69f84720308db0b142c4da0bd6 upstream.

There is plenty of consumer hardware (e.g., mac books) that does not use AT
keyboards or PS/2 mice. It therefore makes sense for distro kernels to
build the related drivers as modules to avoid loading them on hardware that
does not need them. As such, these options should no longer be protected by
EXPERT.

Moreover, building these drivers as modules gets rid of the following ugly
error during boot:

[    2.337745] i8042: PNP: No PS/2 controller found. Probing ports directly.
[    3.439537] i8042: No controller found

Signed-off-by: Tom Gundersen <teg@jklm.no>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agotg3: avoid double-freeing of rx data memory
Ivan Vecera [Wed, 6 Nov 2013 13:02:36 +0000 (14:02 +0100)]
tg3: avoid double-freeing of rx data memory

commit 85aec73d595b8847f9c4ea571deb127913f0d508 upstream.

If build_skb fails the memory associated with the ring buffer is freed but
the ri->data member is not zeroed in this case. This causes a double-free
of this memory in tg3_free_rings->... path. The patch moves this block after
setting ri->data to NULL.
It would be nice to fix this bug also in stable >= v3.4 trees.

Cc: Nithin Nayak Sujir <nsujir@broadcom.com>
Cc: Michael Chan <mchan@broadcom.com>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoiwlwifi: dvm: don't override mac80211's queue setting
Emmanuel Grumbach [Tue, 15 Oct 2013 19:04:54 +0000 (22:04 +0300)]
iwlwifi: dvm: don't override mac80211's queue setting

commit f6b129527ca15bae29ffb9417ddaa1c9d99ffc5d upstream.

Since we set IEEE80211_HW_QUEUE_CONTROL, we can let
mac80211 do the queue assignement and don't need to
override its decisions.
While reassiging the same values is harmless of course,
it triggered  a WARNING when iwlwifi and mac80211 came
to different conclusions. This happened when mac80211 set
IEEE80211_TX_CTL_SEND_AFTER_DTIM, but didn't route the
packet to the cab_queue because no stations were asleep.

iwlwifi should not override mac80211's decicions for
offchannel packets and packets to  be sent after DTIM,
but it should override mac80211's decision for AMPDUs
since we have a special queue for them. So for AMPDU,
we still override info->hw_queue by the AMPDU queue.

This avoids:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 2531 at drivers/net/wireless/iwlwifi/dvm/tx.c:456 iwlagn_tx_skb+0x6c5/0x883()
Modules linked in:
CPU: 0 PID: 2531 Comm: hostapd Not tainted 3.12.0-rc5+ #1
Hardware name:                  /D53427RKE, BIOS RKPPT10H.86A.0017.2013.0425.1251 04/25/2013
 0000000000000000 0000000000000009 ffffffff8189aa62 0000000000000000
 ffffffff8105a4f2 ffff880058339a48 ffffffff815f8a04 0000000000000000
 ffff8800560097b0 0000000000000208 0000000000000000 ffff8800561a9e5e
Call Trace:
 [<ffffffff8189aa62>] ? dump_stack+0x41/0x51
 [<ffffffff8105a4f2>] ? warn_slowpath_common+0x78/0x90
 [<ffffffff815f8a04>] ? iwlagn_tx_skb+0x6c5/0x883
 [<ffffffff815f8a04>] ? iwlagn_tx_skb+0x6c5/0x883
 [<ffffffff818a0040>] ? put_cred+0x15/0x15
 [<ffffffff815f6db4>] ? iwlagn_mac_tx+0x19/0x2f
 [<ffffffff8186cc45>] ? __ieee80211_tx+0x226/0x29b
 [<ffffffff8186e6bd>] ? ieee80211_tx+0xa6/0xb5
 [<ffffffff8186e98b>] ? ieee80211_monitor_start_xmit+0x1e9/0x204
 [<ffffffff8171ce5f>] ? dev_hard_start_xmit+0x271/0x3ec
 [<ffffffff817351ac>] ? sch_direct_xmit+0x66/0x164
 [<ffffffff8171d1bf>] ? dev_queue_xmit+0x1e5/0x3c8
 [<ffffffff817fac5a>] ? packet_sendmsg+0xac5/0xb3d
 [<ffffffff81709a09>] ? sock_sendmsg+0x37/0x52
 [<ffffffff810f9e0c>] ? __do_fault+0x338/0x36b
 [<ffffffff81713820>] ? verify_iovec+0x44/0x94
 [<ffffffff81709e63>] ? ___sys_sendmsg+0x1f1/0x283
 [<ffffffff81140a73>] ? __inode_wait_for_writeback+0x67/0xae
 [<ffffffff8111735e>] ? __cache_free.isra.46+0x178/0x187
 [<ffffffff811173b1>] ? kmem_cache_free+0x44/0x84
 [<ffffffff81132c22>] ? dentry_kill+0x13d/0x149
 [<ffffffff81132f6f>] ? dput+0xe5/0xef
 [<ffffffff81136e04>] ? fget_light+0x2e/0x7c
 [<ffffffff8170ae62>] ? __sys_sendmsg+0x39/0x57
 [<ffffffff818a7e39>] ? system_call_fastpath+0x16/0x1b
---[ end trace 1b3eb79359c1d1e6 ]---

Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoSCSI: Disable WRITE SAME for RAID and virtual host adapter drivers
Martin K. Petersen [Wed, 23 Oct 2013 10:25:40 +0000 (06:25 -0400)]
SCSI: Disable WRITE SAME for RAID and virtual host adapter drivers

commit 54b2b50c20a61b51199bedb6e5d2f8ec2568fb43 upstream.

Some host adapters do not pass commands through to the target disk
directly. Instead they provide an emulated target which may or may not
accurately report its capabilities. In some cases the physical device
characteristics are reported even when the host adapter is processing
commands on the device's behalf. This can lead to adapter firmware hangs
or excessive I/O errors.

This patch disables WRITE SAME for devices connected to host adapters
that provide an emulated target. Driver writers can disable WRITE SAME
by setting the no_write_same flag in the host adapter template.

[jejb: fix up rejections due to eh_deadline patch]
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agox86-64, build: Always pass in -mno-sse
H. Peter Anvin [Wed, 20 Nov 2013 21:31:49 +0000 (13:31 -0800)]
x86-64, build: Always pass in -mno-sse

commit 5551a34e5aeab868f8d37f70d8754868921b4ee5 upstream.

Always pass in the -mno-sse argument, regardless if
-preferred-stack-boundary is supported.  We never want to generate SSE
instructions in the kernel unless we *really* know what we're doing.

According to H. J. Lu, any version of gcc new enough that we support
it at all should handle the -mno-sse option, so just add it
unconditionally.

Reported-by: Kevin B. Smith <kevin.b.smith@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: H. J. Lu <hjl.tools@gmail.com>
Link: http://lkml.kernel.org/n/tip-j21wzqv790q834n7yc6g80j1@git.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agonet: update consumers of MSG_MORE to recognize MSG_SENDPAGE_NOTLAST
Shawn Landden [Mon, 25 Nov 2013 06:36:28 +0000 (22:36 -0800)]
net: update consumers of MSG_MORE to recognize MSG_SENDPAGE_NOTLAST

commit d3f7d56a7a4671d395e8af87071068a195257bf6 upstream.

Commit 35f9c09fe (tcp: tcp_sendpages() should call tcp_push() once)
added an internal flag MSG_SENDPAGE_NOTLAST, similar to
MSG_MORE.

algif_hash, algif_skcipher, and udp used MSG_MORE from tcp_sendpages()
and need to see the new flag as identical to MSG_MORE.

This fixes sendfile() on AF_ALG.

v3: also fix udp

Cc: Tom Herbert <therbert@google.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Reported-and-tested-by: Shawn Landden <shawnlandden@gmail.com>
Original-patch: Richard Weinberger <richard@nod.at>
Signed-off-by: Shawn Landden <shawn@churchofgit.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoirq: Enable all irqs unconditionally in irq_resume
Laxman Dewangan [Mon, 25 Nov 2013 14:09:47 +0000 (19:39 +0530)]
irq: Enable all irqs unconditionally in irq_resume

commit ac01810c9d2814238f08a227062e66a35a0e1ea2 upstream.

When the system enters suspend, it disables all interrupts in
suspend_device_irqs(), including the interrupts marked EARLY_RESUME.

On the resume side things are different. The EARLY_RESUME interrupts
are reenabled in sys_core_ops->resume and the non EARLY_RESUME
interrupts are reenabled in the normal system resume path.

When suspend_noirq() failed or suspend is aborted for any other
reason, we might omit the resume side call to sys_core_ops->resume()
and therefor the interrupts marked EARLY_RESUME are not reenabled and
stay disabled forever.

To solve this, enable all irqs unconditionally in irq_resume()
regardless whether interrupts marked EARLY_RESUMEhave been already
enabled or not.

This might try to reenable already enabled interrupts in the non
failure case, but the only affected platform is XEN and it has been
confirmed that it does not cause any side effects.

[ tglx: Massaged changelog. ]

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by-and-tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Cc: <ian.campbell@citrix.com>
Cc: <rjw@rjwysocki.net>
Cc: <len.brown@intel.com>
Cc: <gregkh@linuxfoundation.org>
Link: http://lkml.kernel.org/r/1385388587-16442-1-git-send-email-ldewangan@nvidia.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoUpdate of blkg_stat and blkg_rwstat may happen in bh context. While u64_stats_fetch_r...
Hong Zhiguo [Wed, 20 Nov 2013 17:35:05 +0000 (10:35 -0700)]
Update of blkg_stat and blkg_rwstat may happen in bh context. While u64_stats_fetch_retry is only preempt_disable on 32bit UP system. This is not enough to avoid preemption by bh and may read strange 64 bit value.

commit 2c575026fae6e63771bd2a4c1d407214a8096a89 upstream.

Signed-off-by: Hong Zhiguo <zhiguohong@tencent.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agocpuidle: Check for dev before deregistering it.
Konrad Rzeszutek Wilk [Tue, 3 Dec 2013 15:59:58 +0000 (10:59 -0500)]
cpuidle: Check for dev before deregistering it.

commit 813e8e3d6aaa0b511126cce15c16a931afffe768 upstream.

If not, we could end up in the unfortunate situation where
we dereference a NULL pointer b/c we have cpuidle disabled.

This is the case when booting under Xen (which uses the
ACPI P/C states but disables the CPU idle driver) - and can
be easily reproduced when booting with cpuidle.off=1.

BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: [<ffffffff8156db4a>] cpuidle_unregister_device+0x2a/0x90
.. snip..
Call Trace:
 [<ffffffff813b15b4>] acpi_processor_power_exit+0x3c/0x5c
 [<ffffffff813af0a9>] acpi_processor_stop+0x61/0xb6
 [<ffffffff814215bf>] __device_release_driver+0fffff81421653>] device_release_driver+0x23/0x30
 [<ffffffff81420ed8>] bus_remove_device+0x108/0x180
 [<ffffffff8141d9d9>] device_del+0x129/0x1c0
 [<ffffffff813cb4b0>] ? unregister_xenbus_watch+0x1f0/0x1f0
 [<ffffffff8141da8e>] device_unregister+0x1e/0x60
 [<ffffffff814243e9>] unregister_cpu+0x39/0x60
 [<ffffffff81019e03>] arch_unregister_cpu+0x23/0x30
 [<ffffffff813c3c51>] handle_vcpu_hotplug_event+0xc1/0xe0
 [<ffffffff813cb4f5>] xenwatch_thread+0x45/0x120
 [<ffffffff810af010>] ? abort_exclusive_wait+0xb0/0xb0
 [<ffffffff8108ec42>] kthread+0xd2/0xf0
 [<ffffffff8108eb70>] ? kthread_create_on_node+0x180/0x180
 [<ffffffff816ce17c>] ret_from_fork+0x7c/0xb0
 [<ffffffff8108eb70>] ? kthread_create_on_node+0x180/0x180

This problem also appears in 3.12 and could be a candidate for backport.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agospi/pxa2xx: add new ACPI IDs
Mika Westerberg [Tue, 12 Nov 2013 10:06:21 +0000 (12:06 +0200)]
spi/pxa2xx: add new ACPI IDs

commit 54acbd9688e6324470671525c7916011f1ff8081 upstream.

Newer Intel PCHs with LPSS have the same SPI controllers than Haswell but
ACPI IDs are different. Add these IDs to the driver list.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoxen/gnttab: leave lazy MMU mode in the case of a m2p override failure
Matt Wilson [Wed, 20 Nov 2013 20:11:35 +0000 (12:11 -0800)]
xen/gnttab: leave lazy MMU mode in the case of a m2p override failure

commit 14883a75ec76b44759385fb12629f4a0f1aef4e3 upstream.

Commit f62805f1 introduced a bug where lazy MMU mode isn't exited if a
m2p_add/remove_override call fails.

Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Anthony Liguori <aliguori@amazon.com>
Signed-off-by: Matt Wilson <msw@amazon.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoparisc: fix mmap(MAP_FIXED|MAP_SHARED) to already mmapped address
Helge Deller [Wed, 20 Nov 2013 22:07:42 +0000 (23:07 +0100)]
parisc: fix mmap(MAP_FIXED|MAP_SHARED) to already mmapped address

commit 0576da2c08e3d332f1b0653030d28ab804585ab6 upstream.

locale-gen on Debian showed a strange problem on parisc:
mmap2(NULL, 536870912, PROT_NONE, MAP_SHARED, 3, 0) = 0x42a54000
mmap2(0x42a54000, 103860, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, 3, 0) = -1 EINVAL (Invalid argument)

Basically it was just trying to re-mmap() a file at the same address
which it was given by a previous mmap() call. But this remapping failed
with EINVAL.

The problem is, that when MAP_FIXED and MAP_SHARED flags were used, we didn't
included the mapping-based offset when we verified the alignment of the given
fixed address against the offset which we calculated it in the previous call.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agopowerpc/gpio: Fix the wrong GPIO input data on MPC8572/MPC8536
Liu Gang [Fri, 22 Nov 2013 08:12:40 +0000 (16:12 +0800)]
powerpc/gpio: Fix the wrong GPIO input data on MPC8572/MPC8536

commit 1aeef303b5d9e243c41d5b80f8bb059366514a10 upstream.

For MPC8572/MPC8536, the status of GPIOs defined as output
cannot be determined by reading GPDAT register, so the code
use shadow data register instead. But the code may give the
wrong status of GPIOs defined as input under some scenarios:

1. If some pins were configured as inputs and were asserted
high before booting the kernel, the shadow data has been
initialized with those pin values.
2. Some pins have been configured as output first and have
been set to the high value, then reconfigured as input.

The above cases will make the shadow data for those input
pins to be set to high. Then reading the pin status will
always return high even if the actual pin status is low.

The code should eliminate the effects of the shadow data to
the input pins, and the status of those pins should be
read directly from GPDAT.

Acked-by: Scott Wood <scottwood@freescale.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Liu Gang <Gang.Liu@freescale.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agotime: Fix 1ns/tick drift w/ GENERIC_TIME_VSYSCALL_OLD
Martin Schwidefsky [Fri, 22 Nov 2013 19:44:51 +0000 (11:44 -0800)]
time: Fix 1ns/tick drift w/ GENERIC_TIME_VSYSCALL_OLD

commit 4be77398ac9d948773116b6be4a3c91b3d6ea18c upstream.

Since commit 1e75fa8be9f (time: Condense timekeeper.xtime
into xtime_sec - merged in v3.6), there has been an problem
with the error accounting in the timekeeping code, such that
when truncating to nanoseconds, we round up to the next nsec,
but the balancing adjustment to the ntp_error value was dropped.

This causes 1ns per tick drift forward of the clock.

In 3.7, this logic was isolated to only GENERIC_TIME_VSYSCALL_OLD
architectures (s390, ia64, powerpc).

The fix is simply to balance the accounting and to subtract the
added nanosecond from ntp_error. This allows the internal long-term
clock steering to keep the clock accurate.

While this fix removes the regression added in 1e75fa8be9f, the
ideal solution is to move away from GENERIC_TIME_VSYSCALL_OLD
and use the new VSYSCALL method, which avoids entirely the
nanosecond granular rounding, and the resulting short-term clock
adjustment oscillation needed to keep long term accurate time.

[ jstultz: Many thanks to Martin for his efforts identifying this
      subtle bug, and providing the fix. ]

Originally-from: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Paul Turner <pjt@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1385149491-20307-1-git-send-email-john.stultz@linaro.org
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoPNP: fix restoring devices after hibernation
Dmitry Torokhov [Thu, 5 Dec 2013 01:01:55 +0000 (02:01 +0100)]
PNP: fix restoring devices after hibernation

commit 8a37ea50e7acf8db6821ba094ca41384e7d8c70c upstream.

On returning from hibernation 'restore' callback is called,
not 'resume'.  Fix it.

Fixes: eaf140b60ec9 (PNP: convert PNP driver bus legacy pm_ops to dev_pm_ops)
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoNFSv4: Update list of irrecoverable errors on DELEGRETURN
Trond Myklebust [Tue, 19 Nov 2013 21:34:14 +0000 (16:34 -0500)]
NFSv4: Update list of irrecoverable errors on DELEGRETURN

commit c97cf606e43b85a6cf158b810375dd77312024db upstream.

If the DELEGRETURN errors out with something like NFS4ERR_BAD_STATEID
then there is no recovery possible. Just quit without returning an error.

Also, note that the client must not assume that the NFSv4 lease has been
renewed when it sees an error on DELEGRETURN.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoSCSI: hpsa: return 0 from driver probe function on success, not 1
Stephen M. Cameron [Fri, 1 Nov 2013 16:02:25 +0000 (11:02 -0500)]
SCSI: hpsa: return 0 from driver probe function on success, not 1

commit 88bf6d62db4393fa03a58bada9d746312d5b496f upstream.

A return value of 1 is interpreted as an error.  See pci_driver.
in local_pci_probe().  If you're wondering how this ever could
have worked, it's because it used to be the case that only return
values less than zero were interpreted as failure.  But even in
the current kernel if the driver registers its various entry
points with the kernel, and then returns a value which is
interpreted as failure, those registrations aren't undone, so
the driver still mostly works.  However, the driver's remove
function wouldn't be called on rmmod, and pci power management
functions wouldn't work.  In the case of Smart Array, since it
has a battery backed cache (or else no cache) even if the driver
is not shut down properly as long as there is no outstanding
i/o, nothing too bad happens, which is why it took so long to
notice.

Requesting backport to stable because the change to pci-driver.c
which requires driver probe functions to return 0 occurred between
2.6.35 and 2.6.36 (the pci power management breakage) and again
between 3.7 and 3.8 (pci_dev->driver getting set to NULL in
local_pci_probe() preventing driver remove function from being
called on rmmod.)

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoSCSI: hpsa: do not discard scsi status on aborted commands
Stephen M. Cameron [Mon, 23 Sep 2013 18:33:41 +0000 (13:33 -0500)]
SCSI: hpsa: do not discard scsi status on aborted commands

commit 2e311fbabdc23b7eaec77313dc3b9a151a5407b5 upstream.

We inadvertantly discarded the scsi status for aborted commands.
For some commands (e.g. reads from tape drives) these can't be retried,
and if we discarded the scsi status, the scsi mid layer couldn't notice
anything was wrong and the error was not reported.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>