review.tizen.org Git - platform/kernel/linux-stable.git/log

posix-timers: Remove dead thread posix cpu timers caching

When a task is exiting or has exited, its posix cpu timers
don't tick anymore and won't elapse further. It's too late
for them to expire.

So any further call to timer_gettime() on these timers will
return the same remaining expiry time.

The current code optimize this by caching the remaining delta
and storing it where we use to save the absolute expiration time.
This way, the future calls to timer_gettime() won't need to
compute the difference between the absolute expiration time and
the current time anymore.

Now this optimization doesn't seem to bring much value. Computing
the timer remaining delta is not very costly. Fetching the timer
value OTOH can be costly in two ways:

* CPUCLOCK_SCHED read requires to lock the target's rq. But some
optimizations are on the way to make task_sched_runtime() not holding
the rq lock of a non-running target.

* CPUCLOCK_VIRT/CPUCLOCK_PROF read simply consist in fetching
current->utime/current->stime except when the system uses full
dynticks cputime accounting. The latter requires a per task lock
in order to correctly compute user and system time. But once the
target is dead, this lock shouldn't be contended anyway.

All in one this caching doesn't seem to be justified.
Given that it complicates the code significantly for
few wins, let's remove it on single thread timers.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Kosaki Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Andrew Morton <akpm@linux-foundation.org>

Merge branch 'timers/core-v2' of git://git./linux/kernel/git/frederic/linux-dynticks into timers/core

Pull dynticks updates from Frederic Weisbecker:

  * Fix a bug where posix cpu timers requeued due to interval got ignored on full
    dynticks CPUs (not a regression though as it only impacts full dynticks and the
    bug is there since we merged full dynticks).

  * Optimizations and cleanups on the use of per CPU APIs to improve code readability,
    performance and debuggability in the nohz subsystem;

  * Optimize posix cpu timer by sparing stub workqueue queue with full dynticks off case

  * Rename some functions to extend with *_this_cpu() suffix for clarity

  * Refine the naming of some context tracking subsystem state accessors

  * Trivial spelling fix by Paul Gortmaker

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge branch 'leds-fixes-for-3.13' of git://git./linux/kernel/git/cooloney/linux-leds

Pull LED subsystem bugfix from Bryan Wu.

* 'leds-fixes-for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds:
leds: pwm: Fix for deferred probe in DT booted mode

leds: pwm: Fix for deferred probe in DT booted mode

We need to make sure that the error code from devm_of_pwm_get() is the one
the module returns in case of failure.
Restructure the code to make this possible for DT booted case.
With this patch the driver can ask for deferred probing when the board is
booted with DT.
Fixes for example omap4-sdp board's keyboard backlight led.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

uio: we cannot mmap unaligned page contents

In commit 7314e613d5ff ("Fix a few incorrectly checked
[io_]remap_pfn_range() calls") the uio driver started more properly
checking the passed-in user mapping arguments against the size of the
actual uio driver data.

That in turn exposed that some driver authors apparently didn't realize
that mmap can only work on a page granularity, and had tried to use it
with smaller mappings, with the new size check catching that out.

So since it's not just the user mmap() arguments that can be confused,
make the uio mmap code also verify that the uio driver has the memory
allocated at page boundaries in order for mmap to work.  If the device
memory isn't properly aligned, we return

  [ENODEV]
    The fildes argument refers to a file whose type is not supported by mmap().

as per the open group documentation on mmap.

Reported-by: Holger Brunck <holger.brunck@keymile.com>
Acked-by: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

posix-timers: Fix full dynticks CPUs kick on timer rescheduling

A posix CPU timer can be rearmed while it is firing or after it is
notified with a signal. This can happen for example with timers that
were set with a non zero interval in timer_settime().

This rearming can happen in two places:

1) On timer firing time, which happens on the target's tick. If the timer
can't trigger a signal because it is ignored, it reschedules itself
to honour the timer interval.

2) On signal handling from the timer's notification target. This one
can be a different task than the timer's target itself. Once the
signal is notified, the notification target rearms the timer, again
to honour the timer interval.

When a timer is rearmed, we need to notify the full dynticks CPUs
such that they restart their tick in case they are running tasks that
may have a share in elapsing this timer.

Now the 1st case above handles full dynticks CPUs with a call to
posix_cpu_timer_kick_nohz() from the posix cpu timer firing code. But
the second case ignores the fact that some CPUs may run non-idle tasks
with their tick off. As a result, when a timer is resheduled after its signal
notification, the full dynticks CPUs may completely ignore it and not
tick on the timer as expected

This patch fixes this bug by handling both cases in one. All we need
is to move the kick to the rearming common code in posix_cpu_timer_schedule().

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Olivier Langlois <olivier@olivierlanglois.net>

posix-timers: Spare workqueue if there is no full dynticks CPU to kick

After a posix cpu timer is set, a workqueue is scheduled in order to
kick the full dynticks CPUs and let them restart their tick if
necessary in case the task they are running is concerned by the
new timer.

This kick is implemented by way of IPIs, which require interrupts
to be enabled, hence the need for a workqueue to raise them because
the posix cpu timer set path has interrupts disabled.

Now if there is no full dynticks CPU on the system, the workqueue is
still scheduled but it simply won't send any IPI and return immediately.

So lets spare that worqueue when it is not needed.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>

context_tracking: Rename context_tracking_active() to context_tracking_cpu_is_enabled()

We currently have a confusing couple of API naming with the existing
context_tracking_active() and context_tracking_is_enabled().

Lets keep the latter one, context_tracking_is_enabled(), for global
context tracking state check and use context_tracking_cpu_is_enabled()
for local state check.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>

context_tracking: Wrap static key check into more intuitive function name

Use a function with a meaningful name to check the global context
tracking state. static_key_false() is a bit confusing for reviewers.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>

trivial: fix spelling in CONTEXT_TRACKING_FORCE help text

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>

nohz: Convert a few places to use local per cpu accesses

A few functions use remote per CPU access APIs when they
deal with local values.

Just do the right conversion to improve performance, code
readability and debug checks.

While at it, lets extend some of these function names with *_this_cpu()
suffix in order to display their purpose more clearly.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>

Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Thomas Gleixner:
- Correction of fuzzy and fragile IRQ_RETVAL macro
- IRQ related resume fix affecting only XEN
- ARM/GIC fix for chained GIC controllers

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip: Gic: fix boot for chained gics
  irq: Enable all irqs unconditionally in irq_resume
  genirq: Correct fuzzy and fragile IRQ_RETVAL() definition

Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:
"Various smaller fixlets, all over the place"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/doc: Fix generation of device-drivers
  sched: Expose preempt_schedule_irq()
  sched: Fix a trivial typo in comments
  sched: Remove unused variable in 'struct sched_domain'
  sched: Avoid NULL dereference on sd_busy
  sched: Check sched_domain before computing group power
  MAINTAINERS: Update file patterns in the lockdep and scheduler entries

Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
"Misc kernel and tooling fixes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tools lib traceevent: Fix conversion of pointer to integer of different size
  perf/trace: Properly use u64 to hold event_id
  perf: Remove fragile swevent hlist optimization
  ftrace, perf: Avoid infinite event generation loop
  tools lib traceevent: Fix use of multiple options in processing field
  perf header: Fix possible memory leaks in process_group_desc()
  perf header: Fix bogus group name
  perf tools: Tag thread comm as overriden

Merge tag 'stable/for-linus-3.13-rc2-tag' of git://git./linux/kernel/git/xen/tip

Pull Xen bug-fixes from Konrad Rzeszutek Wilk:
"Fixes to patches that went in this merge window along with a latent
  bug:
   - Fix lazy flushing in case m2p override fails.
   - Fix module compile issues with ARM/Xen
   - Add missing call to DMA map page for Xen SWIOTLB for ARM"

* tag 'stable/for-linus-3.13-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/gnttab: leave lazy MMU mode in the case of a m2p override failure
  xen/arm: p2m_init and p2m_lock should be static
  arm/xen: Export phys_to_mach to fix Xen module link errors
  swiotlb-xen: add missing xen_dma_map_page call

Merge tag 'spi-v3.13-rc2' of git://git./linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
"A smattering of driver specific fixes here, including a bunch for a
  long standing common pattern in the error handling paths, and a fix
  for an embarrassing thinko in the new devm master registration code"

* tag 'spi-v3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi/pxa2xx: Restore private register bits.
  spi/qspi: Fix qspi remove path.
  spi/qspi: cleanup pm_runtime error check.
  spi/qspi: set correct platform drvdata in ti_qspi_probe()
  spi/pxa2xx: add new ACPI IDs
  spi: core: invert success test in devm_spi_register_master
  spi: spi-mxs: fix reference leak to master in mxs_spi_remove()
  spi: bcm63xx: fix reference leak to master in bcm63xx_spi_remove()
  spi: txx9: fix reference leak to master in txx9spi_remove()
  spi: mpc512x: fix reference leak to master in mpc512x_psc_spi_do_remove()
  spi: rspi: use platform drvdata correctly in rspi_remove()
  spi: bcm2835: fix reference leak to master in bcm2835_spi_remove()

Merge git://git./linux/kernel/git/davem/net

Pull networking updates from David Miller:
"Here is a pile of bug fixes that accumulated while I was in Europe"

1) In fixing kernel leaks to userspace during copying of socket
    addresses, we broke a case that used to work, namely the user
    providing a buffer larger than the in-kernel generic socket address
    structure.  This broke Ruby amongst other things.  Fix from Dan
    Carpenter.

2) Fix regression added by byte queue limit support in 8139cp driver,
    from Yang Yingliang.

3) The addition of MSG_SENDPAGE_NOTLAST buggered up a few sendpage
    implementations, they should just treat it the same as MSG_MORE.
    Fix from Richard Weinberger and Shawn Landden.

4) Handle icmpv4 errors received on ipv6 SIT tunnels correctly, from
    Oussama Ghorbel.  In particular we should send an ICMPv6 unreachable
    in such situations.

5) Fix some regressions in the recent genetlink fixes, in particular
    get the pmcraid driver to use the new safer interfaces correctly.
    From Johannes Berg.

6) macvtap was converted to use a per-cpu set of statistics, but some
    code was still bumping tx_dropped elsewhere.  From Jason Wang.

7) Fix build failure of xen-netback due to missing include on some
    architectures, from Andy Whitecroft.

8) macvtap double counts received packets in statistics, fix from Vlad
    Yasevich.

9) Fix various cases of using *_STATS_BH() when *_STATS() is more
    appropriate.  From Eric Dumazet and Hannes Frederic Sowa.

10) Pktgen ipsec mode doesn't update the ipv4 header length and checksum
    properly after encapsulation.  Fix from Fan Du.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (61 commits)
  net/mlx4_en: Remove selftest TX queues empty condition
  {pktgen, xfrm} Update IPv4 header total len and checksum after tranformation
  virtio_net: make all RX paths handle erors consistently
  virtio_net: fix error handling for mergeable buffers
  virtio_net: Fixed a trivial typo (fitler --> filter)
  netem: fix gemodel loss generator
  netem: fix loss 4 state model
  netem: missing break in ge loss generator
  net/hsr: Support iproute print_opt ('ip -details ...')
  net/hsr: Very small fix of comment style.
  MAINTAINERS: Added net/hsr/ maintainer
  ipv6: fix possible seqlock deadlock in ip6_finish_output2
  ixgbe: Make ixgbe_identify_qsfp_module_generic static
  ixgbe: turn NETIF_F_HW_L2FW_DOFFLOAD off by default
  ixgbe: ixgbe_fwd_ring_down needs to be static
  e1000: fix possible reset_task running after adapter down
  e1000: fix lockdep warning in e1000_reset_task
  e1000: prevent oops when adapter is being closed and reset simultaneously
  igb: Fixed Wake On LAN support
  inet: fix possible seqlock deadlocks
  ...

vfs: fix subtle use-after-free of pipe_inode_info

The pipe code was trying (and failing) to be very careful about freeing
the pipe info only after the last access, with a pattern like:

        spin_lock(&inode->i_lock);
        if (!--pipe->files) {
                inode->i_pipe = NULL;
                kill = 1;
        }
        spin_unlock(&inode->i_lock);
        __pipe_unlock(pipe);
        if (kill)
                free_pipe_info(pipe);

where the final freeing is done last.

HOWEVER.  The above is actually broken, because while the freeing is
done at the end, if we have two racing processes releasing the pipe
inode info, the one that *doesn't* free it will decrement the ->files
count, and unlock the inode i_lock, but then still use the
"pipe_inode_info" afterwards when it does the "__pipe_unlock(pipe)".

This is *very* hard to trigger in practice, since the race window is
very small, and adding debug options seems to just hide it by slowing
things down.

Simon originally reported this way back in July as an Oops in
kmem_cache_allocate due to a single bit corruption (due to the final
"spin_unlock(pipe->mutex.wait_lock)" incrementing a field in a different
allocation that had re-used the free'd pipe-info), it's taken this long
to figure out.

Since the 'pipe->files' accesses aren't even protected by the pipe lock
(we very much use the inode lock for that), the simple solution is to
just drop the pipe lock early.  And since there were two users of this
pattern, create a helper function for it.

Introduced commit ba5bb147330a ("pipe: take allocation and freeing of
pipe_inode_info out of ->i_mutex").

Reported-by: Simon Kirby <sim@hostway.ca>
Reported-by: Ian Applegate <ia@cloudflare.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@kernel.org # v3.10+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

net/mlx4_en: Remove selftest TX queues empty condition

Remove waiting for TX queues to become empty during selftest.
This check is not necessary for any purpose, and might put
the driver into an infinite loop.

Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

{pktgen, xfrm} Update IPv4 header total len and checksum after tranformation

commit a553e4a6317b2cfc7659542c10fe43184ffe53da ("[PKTGEN]: IPSEC support")
tried to support IPsec ESP transport transformation for pktgen, but acctually
this doesn't work at all for two reasons(The orignal transformed packet has
bad IPv4 checksum value, as well as wrong auth value, reported by wireshark)

- After transpormation, IPv4 header total length needs update,
because encrypted payload's length is NOT same as that of plain text.

- After transformation, IPv4 checksum needs re-caculate because of payload
has been changed.

With this patch, armmed pktgen with below cofiguration, Wireshark is able to
decrypted ESP packet generated by pktgen without any IPv4 checksum error or
auth value error.

pgset "flag IPSEC"
pgset "flows 1"

Signed-off-by: Fan Du <fan.du@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

virtio_net: make all RX paths handle erors consistently

receive mergeable now handles errors internally.
Do same for big and small packet paths, otherwise
the logic is too hard to follow.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

virtio_net: fix error handling for mergeable buffers

Eric Dumazet noticed that if we encounter an error
when processing a mergeable buffer, we don't
dequeue all of the buffers from this packet,
the result is almost sure to be loss of networking.

Jason Wang noticed that we also leak a page and that we don't decrement
the rq buf count, so we won't repost buffers (a resource leak).

Fix both issues.

Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Michael Dalton <mwdalton@google.com>
Reported-by: Eric Dumazet <edumazet@google.com>
Reported-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'for-linus' of git://git./linux/kernel/git/rw/uml

Pull UML fixes from Richard Weinberger:
"Fixes two regressions which got introduced this merge window"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: Build always with -mcmodel=large on 64bit
um: Rename print_stack_trace to do_stack_trace

Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
"Some ARM fixes, the biggest of which is the fix for the signal return
  codes; this came up due to an interaction between the V7M nommu
  changes and the BE8 changes.  Dave Martin spotted that the kexec
  trampoline wasn't being correctly copied (in a way which allows
  Thumb-2 to work).

  I've also fixed a number of breakages on footbridge platforms as I've
  upgraded one of my machines to v3.12...  one which had a 1200 day
  uptime"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 7907/1: lib: delay-loop: Add align directive to fix BogoMIPS calculation
  ARM: 7897/1: kexec: Use the right ISA for relocate_new_kernel
  ARM: 7895/1: signal: fix armv7-m build issue in sigreturn_codes.S
  ARM: footbridge: fix EBSA285 LEDs
  ARM: footbridge: fix VGA initialisation
  ARM: fix booting low-vectors machines
  ARM: dma-mapping: check DMA mask against available memory

um: Build always with -mcmodel=large on 64bit

On UML SUBARCH can be x86, x86_64 and i386 and if it is x86
we use uname -m to select a defconfig.
Therefore we can no longer use -mcmodel=large only if SUBARCH
is x86_64.

Reported-and-tested-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

um: Rename print_stack_trace to do_stack_trace

We cannot use print_stack_trace because the name conflicts
with linux/stacktrace.h.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Richard Weinberger <richard@nod.at>

ARM: 7907/1: lib: delay-loop: Add align directive to fix BogoMIPS calculation

Currently mx53 (CortexA8) running at 1GHz reports:
Calibrating delay loop... 663.55 BogoMIPS (lpj=3317760)

Tom Evans verified that alignments of 0x0 and 0x8 run the two instructions of __loop_delay in one clock cycle (1 clock/loop), while alignments of 0x4 and 0xc take 3 clocks to run the loop twice. (1.5 clock/loop)

The original object code looks like this:

00000010 <__loop_const_udelay>:
  10: e3e01000 mvn r1, #0
  14: e51f201c ldr r2, [pc, #-28] ; 0 <__loop_udelay-0x8>
  18: e5922000 ldr r2, [r2]
  1c: e0800921 add r0, r0, r1, lsr #18
  20: e1a00720 lsr r0, r0, #14
  24: e0822b21 add r2, r2, r1, lsr #22
  28: e1a02522 lsr r2, r2, #10
  2c: e0000092 mul r0, r2, r0
  30: e0800d21 add r0, r0, r1, lsr #26
  34: e1b00320 lsrs r0, r0, #6
  38: 01a0f00e moveq pc, lr

0000003c <__loop_delay>:
  3c: e2500001 subs r0, r0, #1
  40: 8afffffe bhi 3c <__loop_delay>
  44: e1a0f00e mov pc, lr

After adding the 'align 3' directive to __loop_delay (align to 8 bytes):

00000010 <__loop_const_udelay>:
  10: e3e01000 mvn r1, #0
  14: e51f201c ldr r2, [pc, #-28] ; 0 <__loop_udelay-0x8>
  18: e5922000 ldr r2, [r2]
  1c: e0800921 add r0, r0, r1, lsr #18
  20: e1a00720 lsr r0, r0, #14
  24: e0822b21 add r2, r2, r1, lsr #22
  28: e1a02522 lsr r2, r2, #10
  2c: e0000092 mul r0, r2, r0
  30: e0800d21 add r0, r0, r1, lsr #26
  34: e1b00320 lsrs r0, r0, #6
  38: 01a0f00e moveq pc, lr
  3c: e320f000 nop {0}

00000040 <__loop_delay>:
  40: e2500001 subs r0, r0, #1
  44: 8afffffe bhi 40 <__loop_delay>
  48: e1a0f00e mov pc, lr
  4c: e320f000 nop {0}

, which now reports:
Calibrating delay loop... 996.14 BogoMIPS (lpj=4980736)

Some more test results:

On mx31 (ARM1136) running at 532 MHz, before the patch:
Calibrating delay loop... 351.43 BogoMIPS (lpj=1757184)

On mx31 (ARM1136) running at 532 MHz after the patch:
Calibrating delay loop... 528.79 BogoMIPS (lpj=2643968)

Also tested on mx6 (CortexA9) and on mx27 (ARM926), which shows the same
BogoMIPS value before and after this patch.

Reported-by: Tom Evans <tom_usenet@optusnet.com.au>
Suggested-by: Tom Evans <tom_usenet@optusnet.com.au>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: 7897/1: kexec: Use the right ISA for relocate_new_kernel

Copying a function with memcpy() and then trying to execute the
result isn't trivially portable to Thumb.

This patch modifies the kexec soft restart code to copy its
assembler trampoline relocate_new_kernel() using fncpy() instead,
so that relocate_new_kernel can be in the same ISA as the rest of
the kernel without problems.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Reported-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Tested-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: 7895/1: signal: fix armv7-m build issue in sigreturn_codes.S

After "ARM: signal: sigreturn_codes should be endian neutral to
work in BE8" commit, thumb only platforms, like armv7m, fails to
compile sigreturn_codes.S. The reason is that for such arch
values '.arm' directive and arm opcodes are not allowed.

Fix conditionally enables arm opcodes only if no CONFIG_CPU_THUMBONLY
defined and it uses .org instructions to keep sigreturn_codes
layout.

Suggested-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: footbridge: fix EBSA285 LEDs

- The LEDs register is write-only: it can't be read-modify-written.
- The LEDs are write-1-for-off not 0.
- The check for the platform was inverted.

Fixes: cf6856d693dd ("ARM: mach-footbridge: retire custom LED code")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: stable@vger.kernel.org

virtio_net: Fixed a trivial typo (fitler --> filter)

"MAC filter" sounds more reasonable than "MAC fitler".

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

netem: fix gemodel loss generator

Patch from developers of the alternative loss models, downloaded from:
   http://netgroup.uniroma2.it/twiki/bin/view.cgi/Main/NetemCLG

"in case 2, of the switch we change the direction of the inequality to
  net_random()>clg->a3, because clg->a3 is h in the GE model and when h
  is 0 all packets will be lost."

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

netem: fix loss 4 state model

Patch from developers of the alternative loss models, downloaded from:
http://netgroup.uniroma2.it/twiki/bin/view.cgi/Main/NetemCLG

"In the case 1 of the switch statement in the if conditions we
need to add clg->a4 to clg->a1, according to the model."

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

netem: missing break in ge loss generator

There is a missing break statement in the Gilbert Elliot loss model
generator which makes state machine behave incorrectly.

Reported-by: Martin Burri <martin.burri@ch.abb.com
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/hsr: Support iproute print_opt ('ip -details ...')

This implements the rtnl_link_ops fill_info routine for HSR.

Signed-off-by: Arvid Brodin <arvid.brodin@alten.se>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/hsr: Very small fix of comment style.

Signed-off-by: Arvid Brodin <arvid.brodin@alten.se>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS: Added net/hsr/ maintainer

Signed-off-by: Arvid Brodin <arvid.brodin@alten.se>
Signed-off-by: David S. Miller <davem@davemloft.net>

ipv6: fix possible seqlock deadlock in ip6_finish_output2

IPv6 stats are 64 bits and thus are protected with a seqlock. By not
disabling bottom-half we could deadlock here if we don't disable bh and
a softirq reentrantly updates the same mib.

Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'master' of git://git./linux/kernel/git/jkirsher/net

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates

This series contains updates to igb, e1000 and ixgbe.

Akeem provides a igb fix where WOL was being reported as supported on
some ethernet devices which did not have that capability.

Yanjun provides a fix for e1000 which is similar to a previous fix
for e1000e commit bb9e44d0d0f4 ("e1000e: prevent oops when adapter is
being closed and reset simultaneously"), where the same issue was
observed on the older e1000 cards.

Vladimir Davydov provides 2 e1000 fixes.  The first fixes a lockdep
warning e1000_down() tries to synchronously cancel e1000 auxiliary
works (reset_task, watchdog_task, phy_info_task and fifo_stall_task)
which take adapter->mutex in their handlers.  The second patch is to
fix a possible race condition where reset_task() would be running
after adapter down.

John provides 2 fixes for ixgbe.  First turns ixgbe_fwd_ring_down
to static and the second disables NETIF_F_HW_L2FW_DOFFLOAD by default
because it allows upper layer net devices to use queues in the hardware
to directly submit and receive skbs.

Mark Rustad provides a single patch for ixgbe to make
ixgbe_identify_qsfp_module_generic static to resolve compile
warnings.

v2: Drop igb patch "igb: Update queue reinit function to call dev_close
    when init of queues fails" from Carolyn, so that the solution can
    be re-worked based on feedback from David Miller.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

ARM: footbridge: fix VGA initialisation

It's no good setting vga_base after the VGA console has been
initialised, because if we do that we get this:

Unable to handle kernel paging request at virtual address 000b8000
pgd = c0004000
[000b8000] *pgd=07ffc831, *pte=00000000, *ppte=00000000
0Internal error: Oops: 5017 [#1] ARM
Modules linked in:
CPU: 0 PID: 0 Comm: swapper Not tainted 3.12.0+ #49
task: c03e2974 ti: c03d8000 task.ti: c03d8000
PC is at vgacon_startup+0x258/0x39c
LR is at request_resource+0x10/0x1c
pc : [<c01725d0>]    lr : [<c0022b50>]    psr: 60000053
sp : c03d9f68  ip : 000b8000  fp : c03d9f8c
r10: 000055aa  r9 : 4401a103  r8 : ffffaa55
r7 : c03e357c  r6 : c051b460  r5 : 000000ff  r4 : 000c0000
r3 : 000b8000  r2 : c03e0514  r1 : 00000000  r0 : c0304971
Flags: nZCv  IRQs on  FIQs off  Mode SVC_32  ISA ARM  Segment kernel

which is an access to the 0xb8000 without the PCI offset required to
make it work.

Fixes: cc22b4c18540 ("ARM: set vga memory base at run-time")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: <stable@vger.kernel.org>

ARM: fix booting low-vectors machines

Commit f6f91b0d9fd9 (ARM: allow kuser helpers to be removed from the
vector page) required two pages for the vectors code. Although the
code setting up the initial page tables was updated, the code which
allocates page tables for new processes wasn't, neither was the code
which tears down the mappings. Fix this.

Fixes: f6f91b0d9fd9 ("ARM: allow kuser helpers to be removed from the vector page")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: <stable@vger.kernel.org>

ARM: dma-mapping: check DMA mask against available memory

Some buses have negative offsets, which causes the DMA mask checks to
falsely fail. Fix this by using the actual amount of memory fitted in
the system.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ixgbe: Make ixgbe_identify_qsfp_module_generic static

Correct a namespace complaint by making the function static
and moving the prototype into the .c file.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

ixgbe: turn NETIF_F_HW_L2FW_DOFFLOAD off by default

NETIF_F_HW_L2FW_DOFFLOAD allows upper layer net devices such
as macvlan to use queues in the hardware to directly submit and
receive skbs.

This creates a subtle change in the datapath though. One change
being the skb may no longer use the root devices qdisc.

Because users may not expect this we can't enable the feature
by default unless the hardware can offload all the software
functionality above it. So for now disable it by default and
let users opt in.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

ixgbe: ixgbe_fwd_ring_down needs to be static

When compiling with -Wstrict-prototypes gcc catches a static
I missed.

./ixgbe_main.c:4254: warning: no previous prototype for 'ixgbe_fwd_ring_down'

Reported-by: Phillip Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

e1000: fix possible reset_task running after adapter down

On e1000_down(), we should ensure every asynchronous work is canceled
before proceeding. Since the watchdog_task can schedule other works
apart from itself, it should be stopped first, but currently it is
stopped after the reset_task. This can result in the following race
leading to the reset_task running after the module unload:

e1000_down_and_stop(): e1000_watchdog():
---------------------- -----------------

cancel_work_sync(reset_task)
schedule_work(reset_task)
cancel_delayed_work_sync(watchdog_task)

The patch moves cancel_delayed_work_sync(watchdog_task) at the beginning
of e1000_down_and_stop() thus ensuring the race is impossible.

Cc: Tushar Dave <tushar.n.dave@intel.com>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

e1000: fix lockdep warning in e1000_reset_task

The patch fixes the following lockdep warning, which is 100%
reproducible on network restart:

======================================================
[ INFO: possible circular locking dependency detected ]
3.12.0+ #47 Tainted: GF
-------------------------------------------------------
kworker/1:1/27 is trying to acquire lock:
((&(&adapter->watchdog_task)->work)){+.+...}, at: [<ffffffff8108a5b0>] flush_work+0x0/0x70

but task is already holding lock:
(&adapter->mutex){+.+...}, at: [<ffffffffa0177c0a>] e1000_reset_task+0x4a/0xa0 [e1000]

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #1 (&adapter->mutex){+.+...}:
       [<ffffffff810bdb5d>] lock_acquire+0x9d/0x120
       [<ffffffff816b8cbc>] mutex_lock_nested+0x4c/0x390
       [<ffffffffa017233d>] e1000_watchdog+0x7d/0x5b0 [e1000]
       [<ffffffff8108b972>] process_one_work+0x1d2/0x510
       [<ffffffff8108ca80>] worker_thread+0x120/0x3a0
       [<ffffffff81092c1e>] kthread+0xee/0x110
       [<ffffffff816c3d7c>] ret_from_fork+0x7c/0xb0

-> #0 ((&(&adapter->watchdog_task)->work)){+.+...}:
       [<ffffffff810bd9c0>] __lock_acquire+0x1710/0x1810
       [<ffffffff810bdb5d>] lock_acquire+0x9d/0x120
       [<ffffffff8108a5eb>] flush_work+0x3b/0x70
       [<ffffffff8108b5d8>] __cancel_work_timer+0x98/0x140
       [<ffffffff8108b693>] cancel_delayed_work_sync+0x13/0x20
       [<ffffffffa0170cec>] e1000_down_and_stop+0x3c/0x60 [e1000]
       [<ffffffffa01775b1>] e1000_down+0x131/0x220 [e1000]
       [<ffffffffa0177c12>] e1000_reset_task+0x52/0xa0 [e1000]
       [<ffffffff8108b972>] process_one_work+0x1d2/0x510
       [<ffffffff8108ca80>] worker_thread+0x120/0x3a0
       [<ffffffff81092c1e>] kthread+0xee/0x110
       [<ffffffff816c3d7c>] ret_from_fork+0x7c/0xb0

other info that might help us debug this:

Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&adapter->mutex);
                               lock((&(&adapter->watchdog_task)->work));
                               lock(&adapter->mutex);
  lock((&(&adapter->watchdog_task)->work));

*** DEADLOCK ***

3 locks held by kworker/1:1/27:
#0:  (events){.+.+.+}, at: [<ffffffff8108b906>] process_one_work+0x166/0x510
#1:  ((&adapter->reset_task)){+.+...}, at: [<ffffffff8108b906>] process_one_work+0x166/0x510
#2:  (&adapter->mutex){+.+...}, at: [<ffffffffa0177c0a>] e1000_reset_task+0x4a/0xa0 [e1000]

stack backtrace:
CPU: 1 PID: 27 Comm: kworker/1:1 Tainted: GF            3.12.0+ #47
Hardware name: System manufacturer System Product Name/P5B-VM SE, BIOS 0501    05/31/2007
Workqueue: events e1000_reset_task [e1000]
ffffffff820f6000 ffff88007b9dba98 ffffffff816b54a2 0000000000000002
ffffffff820f5e50 ffff88007b9dbae8 ffffffff810ba936 ffff88007b9dbac8
ffff88007b9dbb48 ffff88007b9d8f00 ffff88007b9d8780 ffff88007b9d8f00
Call Trace:
[<ffffffff816b54a2>] dump_stack+0x49/0x5f
[<ffffffff810ba936>] print_circular_bug+0x216/0x310
[<ffffffff810bd9c0>] __lock_acquire+0x1710/0x1810
[<ffffffff8108a5b0>] ? __flush_work+0x250/0x250
[<ffffffff810bdb5d>] lock_acquire+0x9d/0x120
[<ffffffff8108a5b0>] ? __flush_work+0x250/0x250
[<ffffffff8108a5eb>] flush_work+0x3b/0x70
[<ffffffff8108a5b0>] ? __flush_work+0x250/0x250
[<ffffffff8108b5d8>] __cancel_work_timer+0x98/0x140
[<ffffffff8108b693>] cancel_delayed_work_sync+0x13/0x20
[<ffffffffa0170cec>] e1000_down_and_stop+0x3c/0x60 [e1000]
[<ffffffffa01775b1>] e1000_down+0x131/0x220 [e1000]
[<ffffffffa0177c12>] e1000_reset_task+0x52/0xa0 [e1000]
[<ffffffff8108b972>] process_one_work+0x1d2/0x510
[<ffffffff8108b906>] ? process_one_work+0x166/0x510
[<ffffffff8108ca80>] worker_thread+0x120/0x3a0
[<ffffffff8108c960>] ? manage_workers+0x2c0/0x2c0
[<ffffffff81092c1e>] kthread+0xee/0x110
[<ffffffff81092b30>] ? __init_kthread_worker+0x70/0x70
[<ffffffff816c3d7c>] ret_from_fork+0x7c/0xb0
[<ffffffff81092b30>] ? __init_kthread_worker+0x70/0x70

== The issue background ==

The problem occurs, because e1000_down(), which is called under
adapter->mutex by e1000_reset_task(), tries to synchronously cancel
e1000 auxiliary works (reset_task, watchdog_task, phy_info_task,
fifo_stall_task), which take adapter->mutex in their handlers. So the
question is what does adapter->mutex protect there?

The adapter->mutex was introduced by commit 0ef4ee ("e1000: convert to
private mutex from rtnl") as a replacement for rtnl_lock() taken in the
asynchronous handlers. It targeted on fixing a similar lockdep warning
issued when e1000_down() was called under rtnl_lock(), and it fixed it,
but unfortunately it introduced the lockdep warning described above.
Anyway, that said the source of this bug is that the asynchronous works
were made to take rtnl_lock() some time ago, so let's look deeper and
find why it was added there.

The rtnl_lock() was added to asynchronous handlers by commit 338c15
("e1000: fix occasional panic on unload") in order to prevent
asynchronous handlers from execution after the module is unloaded
(e1000_down() is called) as it follows from the comment to the commit:

> Net drivers in general have an issue where timers fired
> by mod_timer or work threads with schedule_work are running
> outside of the rtnl_lock.
>
> With no other lock protection these routines are vulnerable
> to races with driver unload or reset paths.
>
> The longer term solution to this might be a redesign with
> safer locks being taken in the driver to guarantee no
> reentrance, but for now a safe and effective fix is
> to take the rtnl_lock in these routines.

I'm not sure if this locking scheme fixed the problem or just made it
unlikely, although I incline to the latter. Anyway, this was long time
ago when e1000 auxiliary works were implemented as timers scheduling
real work handlers in their routines. The e1000_down() function only
canceled the timers, but left the real handlers running if they were
running, which could result in work execution after module unload.
Today, the e1000 driver uses sane delayed works instead of the pair
timer+work to implement its delayed asynchronous handlers, and the
e1000_down() synchronously cancels all the works so that the problem
that commit 338c15 tried to cope with disappeared, and we don't need any
locks in the handlers any more. Moreover, any locking there can
potentially result in a deadlock.

So, this patch reverts commits 0ef4ee and 338c15.

Fixes: 0ef4eedc2e98 ("e1000: convert to private mutex from rtnl")
Fixes: 338c15e470d8 ("e1000: fix occasional panic on unload")
Cc: Tushar Dave <tushar.n.dave@intel.com>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

e1000: prevent oops when adapter is being closed and reset simultaneously

This change is based on a similar change made to e1000e support in
commit bb9e44d0d0f4 ("e1000e: prevent oops when adapter is being closed
and reset simultaneously"). The same issue has also been observed
on the older e1000 cards.

Here, we have increased the RESET_COUNT value to 50 because there are too
many accesses to e1000 nic on stress tests to e1000 nic, it is not enough
to set RESET_COUT 25. Experimentation has shown that it is enough to set
RESET_COUNT 50.

Signed-off-by: yzhu1 <yanjun.zhu@windriver.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

igb: Fixed Wake On LAN support

This patch fixes Wake on LAN being reported as supported on some Ethernet
ports, in contrary to Hardware capability.

Signed-off-by: Akeem G Abodunrin <akeem.g.abodunrin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

ima: store address of template_fmt_copy in a pointer before calling strsep

This patch stores the address of the 'template_fmt_copy' variable in a new
variable, called 'template_fmt_ptr', so that the latter is passed as an
argument of strsep() instead of the former. This modification is needed
in order to correctly free the memory area referenced by
'template_fmt_copy' (strsep() modifies the pointer of the passed string).

Signed-off-by: Roberto Sassu <roberto.sassu@polito.it>
Reported-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>

inet: fix possible seqlock deadlocks

In commit c9e9042994d3 ("ipv4: fix possible seqlock deadlock") I left
another places where IP_INC_STATS_BH() were improperly used.

udp_sendmsg(), ping_v4_sendmsg() and tcp_v4_connect() are called from
process context, not from softirq context.

This was detected by lockdep seqlock support.

Reported-by: jongman heo <jongman.heo@samsung.com>
Fixes: 584bdf8cbdf6 ("[IPV4]: Fix "ipOutNoRoutes" counter error for TCP and UDP")
Fixes: c319b4d76b9e ("net: ipv4: add IPPROTO_ICMP socket kind")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

team: fix master carrier set when user linkup is enabled

When user linkup is enabled and user sets linkup of individual port,
we need to recompute linkup (carrier) of master interface so the change
is reflected. Fix this by calling __team_carrier_check() which does the
needed work.

Please apply to all stable kernels as well. Thanks.

Reported-by: Jan Tluka <jtluka@redhat.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: update consumers of MSG_MORE to recognize MSG_SENDPAGE_NOTLAST

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>
Cc: <stable@vger.kernel.org> # 3.4.x + 3.2.x
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>

sfc: Convert to use hwmon_device_register_with_groups

Simplify the code. Avoid race conditions caused by attributes
being created after hwmon device registration. Implicitly
(through hwmon API) add mandatory 'name' sysfs attribute.

Reviewed-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: smc91: fix crash regression on the versatile

After commit e9e4ea74f06635f2ffc1dffe5ef40c854faa0a90
"net: smc91x: dont't use SMC_outw for fixing up halfword-aligned data"
The Versatile SMSC LAN91C111 is crashing like this:

------------[ cut here ]------------
kernel BUG at /home/linus/linux/drivers/net/ethernet/smsc/smc91x.c:599!
Internal error: Oops - BUG: 0 [#1] ARM
Modules linked in:
CPU: 0 PID: 43 Comm: udhcpc Not tainted 3.13.0-rc1+ #24
task: c6ccfaa0 ti: c6cd0000 task.ti: c6cd0000
PC is at smc_hardware_send_pkt+0x198/0x22c
LR is at smc_hardware_send_pkt+0x24/0x22c
pc : [<c01be324>]    lr : [<c01be1b0>]    psr: 20000013
sp : c6cd1d08  ip : 00000001  fp : 00000000
r10: c02adb08  r9 : 00000000  r8 : c6ced802
r7 : c786fba0  r6 : 00000146  r5 : c8800000  r4 : c78d6000
r3 : 0000000f  r2 : 00000146  r1 : 00000000  r0 : 00000031
Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 0005317f  Table: 06cf4000  DAC: 00000015
Process udhcpc (pid: 43, stack limit = 0xc6cd01c0)
Stack: (0xc6cd1d08 to 0xc6cd2000)
1d00:                   00000010 c8800000 c78d6000 c786fba0 c78d6000 c01be868
1d20: c01be7a4 00004000 00000000 c786fba0 c6c12b80 c0208554 000004d0 c780fc60
1d40: 00000220 c01fb734 00000000 00000000 00000000 c6c9a440 c6c12b80 c78d6000
1d60: c786fba0 c6c9a440 00000000 c021d1d8 00000000 00000000 c6c12b80 c78d6000
1d80: c786fba0 00000001 c6c9a440 c02087f8 c6c9a4a0 00080008 00000000 00000000
1da0: c78d6000 c786fba0 c78d6000 00000138 00000000 00000000 00000000 00000000
1dc0: 00000000 c027ba74 00000138 00000138 00000001 00000010 c6cedc00 00000000
1de0: 00000008 c7404400 c6cd1eec c6cd1f14 c067a73c c065c0b8 00000000 c067a740
1e00: 01ffffff 002040d0 00000000 00000000 00000000 00000000 00000000 ffffffff
1e20: 43004400 00110022 c6cdef20 c027ae8c c6ccfaa0 be82d65c 00000014 be82d3cc
1e40: 00000000 00000000 00000000 c01f2870 00000000 00000000 00000000 c6cd1e88
1e60: c6ccfaa0 00000000 00000000 00000000 00000000 00000000 00000000 00000000
1e80: 00000000 00000000 00000031 c7802310 c7802300 00000138 c7404400 c0771da0
1ea0: 00000000 c6cd1eec c7800340 00000138 be82d65c 00000014 be82d3cc c6cd1f08
1ec0: 00000014 00000000 c7404400 c7404400 00000138 c01f4628 c78d6000 00000000
1ee0: 00000000 be82d3cc 00000138 c6cd1f08 00000014 c6cd1ee4 00000001 00000000
1f00: 00000000 00000000 00080011 00000002 06000000 ffffffff 0000ffff 00000002
1f20: 06000000 ffffffff 0000ffff c00928c8 c065c520 c6cd1f58 00000003 c009299c
1f40: 00000003 c065c520 c7404400 00000000 c7404400 c01f2218 c78106b0 c7441cb0
1f60: 00000000 00000006 c06799fc 00000000 00000000 00000006 00000000 c01f3ee0
1f80: 00000000 00000000 be82d678 be82d65c 00000014 00000001 00000122 c00139c8
1fa0: c6cd0000 c0013840 be82d65c 00000014 00000006 be82d3cc 00000138 00000000
1fc0: be82d65c 00000014 00000001 00000122 00000000 00000000 00018cb1 00000000
1fe0: 00003801 be82d3a8 0003a0c7 b6e9af08 60000010 00000006 00000000 00000000
[<c01be324>] (smc_hardware_send_pkt+0x198/0x22c) from [<c01be868>] (smc_hard_start_xmit+0xc4/0x1e8)
[<c01be868>] (smc_hard_start_xmit+0xc4/0x1e8) from [<c0208554>] (dev_hard_start_xmit+0x460/0x4cc)
[<c0208554>] (dev_hard_start_xmit+0x460/0x4cc) from [<c021d1d8>] (sch_direct_xmit+0x94/0x18c)
[<c021d1d8>] (sch_direct_xmit+0x94/0x18c) from [<c02087f8>] (dev_queue_xmit+0x238/0x42c)
[<c02087f8>] (dev_queue_xmit+0x238/0x42c) from [<c027ba74>] (packet_sendmsg+0xbe8/0xd28)
[<c027ba74>] (packet_sendmsg+0xbe8/0xd28) from [<c01f2870>] (sock_sendmsg+0x84/0xa8)
[<c01f2870>] (sock_sendmsg+0x84/0xa8) from [<c01f4628>] (SyS_sendto+0xb8/0xdc)
[<c01f4628>] (SyS_sendto+0xb8/0xdc) from [<c0013840>] (ret_fast_syscall+0x0/0x2c)
Code: e3130002 1a000001 e3130001 0affffcd (e7f001f2)
---[ end trace 81104fe70e8da7fe ]---
Kernel panic - not syncing: Fatal exception in interrupt

This is because the macro operations in smc91x.h defined
for Versatile are missing SMC_outsw() as used in this
commit.

The Versatile needs and uses the same accessors as the other
platforms in the first if(...) clause, just switch it to using
that and we have one problem less to worry about.

This includes a hunk of a patch from Will Deacon fixin
the other 32bit platforms as well: Innokom, Ramses, PXA,
PCM027.

Checkpatch complains about spacing, but I have opted to
follow the style of this .h-file.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Nicolas Pitre <nico@fluxnic.net>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Revert "net: smc91: fix crash regression on the versatile"

This reverts commit b268daffdcb9762ad9aa3898096570a9dd92aa9b.

I applied the wrong version of this patch, the proper version
is coming up next.

Signed-off-by: David S. Miller <davem@davemloft.net>

net: smc91: fix crash regression on the versatile

After commit e9e4ea74f06635f2ffc1dffe5ef40c854faa0a90
"net: smc91x: dont't use SMC_outw for fixing up halfword-aligned data"
The Versatile SMSC LAN91C111 is crashing like this:

------------[ cut here ]------------
kernel BUG at /home/linus/linux/drivers/net/ethernet/smsc/smc91x.c:599!
Internal error: Oops - BUG: 0 [#1] ARM
Modules linked in:
CPU: 0 PID: 43 Comm: udhcpc Not tainted 3.13.0-rc1+ #24
task: c6ccfaa0 ti: c6cd0000 task.ti: c6cd0000
PC is at smc_hardware_send_pkt+0x198/0x22c
LR is at smc_hardware_send_pkt+0x24/0x22c
pc : [<c01be324>]    lr : [<c01be1b0>]    psr: 20000013
sp : c6cd1d08  ip : 00000001  fp : 00000000
r10: c02adb08  r9 : 00000000  r8 : c6ced802
r7 : c786fba0  r6 : 00000146  r5 : c8800000  r4 : c78d6000
r3 : 0000000f  r2 : 00000146  r1 : 00000000  r0 : 00000031
Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 0005317f  Table: 06cf4000  DAC: 00000015
Process udhcpc (pid: 43, stack limit = 0xc6cd01c0)
Stack: (0xc6cd1d08 to 0xc6cd2000)
1d00:                   00000010 c8800000 c78d6000 c786fba0 c78d6000 c01be868
1d20: c01be7a4 00004000 00000000 c786fba0 c6c12b80 c0208554 000004d0 c780fc60
1d40: 00000220 c01fb734 00000000 00000000 00000000 c6c9a440 c6c12b80 c78d6000
1d60: c786fba0 c6c9a440 00000000 c021d1d8 00000000 00000000 c6c12b80 c78d6000
1d80: c786fba0 00000001 c6c9a440 c02087f8 c6c9a4a0 00080008 00000000 00000000
1da0: c78d6000 c786fba0 c78d6000 00000138 00000000 00000000 00000000 00000000
1dc0: 00000000 c027ba74 00000138 00000138 00000001 00000010 c6cedc00 00000000
1de0: 00000008 c7404400 c6cd1eec c6cd1f14 c067a73c c065c0b8 00000000 c067a740
1e00: 01ffffff 002040d0 00000000 00000000 00000000 00000000 00000000 ffffffff
1e20: 43004400 00110022 c6cdef20 c027ae8c c6ccfaa0 be82d65c 00000014 be82d3cc
1e40: 00000000 00000000 00000000 c01f2870 00000000 00000000 00000000 c6cd1e88
1e60: c6ccfaa0 00000000 00000000 00000000 00000000 00000000 00000000 00000000
1e80: 00000000 00000000 00000031 c7802310 c7802300 00000138 c7404400 c0771da0
1ea0: 00000000 c6cd1eec c7800340 00000138 be82d65c 00000014 be82d3cc c6cd1f08
1ec0: 00000014 00000000 c7404400 c7404400 00000138 c01f4628 c78d6000 00000000
1ee0: 00000000 be82d3cc 00000138 c6cd1f08 00000014 c6cd1ee4 00000001 00000000
1f00: 00000000 00000000 00080011 00000002 06000000 ffffffff 0000ffff 00000002
1f20: 06000000 ffffffff 0000ffff c00928c8 c065c520 c6cd1f58 00000003 c009299c
1f40: 00000003 c065c520 c7404400 00000000 c7404400 c01f2218 c78106b0 c7441cb0
1f60: 00000000 00000006 c06799fc 00000000 00000000 00000006 00000000 c01f3ee0
1f80: 00000000 00000000 be82d678 be82d65c 00000014 00000001 00000122 c00139c8
1fa0: c6cd0000 c0013840 be82d65c 00000014 00000006 be82d3cc 00000138 00000000
1fc0: be82d65c 00000014 00000001 00000122 00000000 00000000 00018cb1 00000000
1fe0: 00003801 be82d3a8 0003a0c7 b6e9af08 60000010 00000006 00000000 00000000
[<c01be324>] (smc_hardware_send_pkt+0x198/0x22c) from [<c01be868>] (smc_hard_start_xmit+0xc4/0x1e8)
[<c01be868>] (smc_hard_start_xmit+0xc4/0x1e8) from [<c0208554>] (dev_hard_start_xmit+0x460/0x4cc)
[<c0208554>] (dev_hard_start_xmit+0x460/0x4cc) from [<c021d1d8>] (sch_direct_xmit+0x94/0x18c)
[<c021d1d8>] (sch_direct_xmit+0x94/0x18c) from [<c02087f8>] (dev_queue_xmit+0x238/0x42c)
[<c02087f8>] (dev_queue_xmit+0x238/0x42c) from [<c027ba74>] (packet_sendmsg+0xbe8/0xd28)
[<c027ba74>] (packet_sendmsg+0xbe8/0xd28) from [<c01f2870>] (sock_sendmsg+0x84/0xa8)
[<c01f2870>] (sock_sendmsg+0x84/0xa8) from [<c01f4628>] (SyS_sendto+0xb8/0xdc)
[<c01f4628>] (SyS_sendto+0xb8/0xdc) from [<c0013840>] (ret_fast_syscall+0x0/0x2c)
Code: e3130002 1a000001 e3130001 0affffcd (e7f001f2)
---[ end trace 81104fe70e8da7fe ]---
Kernel panic - not syncing: Fatal exception in interrupt

This is because the macro operations in smc91x.h defined
for Versatile are missing SMC_outsw() as used in this
commit.

The Versatile needs and uses the same accessors as the other
platforms in the first if(...) clause, just switch it to using
that and we have one problem less to worry about.

Checkpatch complains about spacing, but I have opted to
follow the style of this .h-file.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Nicolas Pitre <nico@fluxnic.net>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: 8139cp: fix a BUG_ON triggered by wrong bytes_compl

Using iperf to send packets(GSO mode is on), a bug is triggered:

[  212.672781] kernel BUG at lib/dynamic_queue_limits.c:26!
[  212.673396] invalid opcode: 0000 [#1] SMP
[  212.673882] Modules linked in: 8139cp(O) nls_utf8 edd fuse loop dm_mod ipv6 i2c_piix4 8139too i2c_core intel_agp joydev pcspkr hid_generic intel_gtt floppy sr_mod mii button sg cdrom ext3 jbd mbcache usbhid hid uhci_hcd ehci_hcd usbcore sd_mod usb_common crc_t10dif crct10dif_common processor thermal_sys hwmon scsi_dh_emc scsi_dh_rdac scsi_dh_hp_sw scsi_dh ata_generic ata_piix libata scsi_mod [last unloaded: 8139cp]
[  212.676084] CPU: 0 PID: 4124 Comm: iperf Tainted: G           O 3.12.0-0.7-default+ #16
[  212.676084] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[  212.676084] task: ffff8800d83966c0 ti: ffff8800db4c8000 task.ti: ffff8800db4c8000
[  212.676084] RIP: 0010:[<ffffffff8122e23f>]  [<ffffffff8122e23f>] dql_completed+0x17f/0x190
[  212.676084] RSP: 0018:ffff880116e03e30  EFLAGS: 00010083
[  212.676084] RAX: 00000000000005ea RBX: 0000000000000f7c RCX: 0000000000000002
[  212.676084] RDX: ffff880111dd0dc0 RSI: 0000000000000bd4 RDI: ffff8800db6ffcc0
[  212.676084] RBP: ffff880116e03e48 R08: 0000000000000992 R09: 0000000000000000
[  212.676084] R10: ffffffff8181e400 R11: 0000000000000004 R12: 000000000000000f
[  212.676084] R13: ffff8800d94ec840 R14: ffff8800db440c80 R15: 000000000000000e
[  212.676084] FS:  00007f6685a3c700(0000) GS:ffff880116e00000(0000) knlGS:0000000000000000
[  212.676084] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  212.676084] CR2: 00007f6685ad6460 CR3: 00000000db714000 CR4: 00000000000006f0
[  212.676084] Stack:
[  212.676084]  ffff8800db6ffc00 000000000000000f ffff8800d94ec840 ffff880116e03eb8
[  212.676084]  ffffffffa041509f ffff880116e03e88 0000000f16e03e88 ffff8800d94ec000
[  212.676084]  00000bd400059858 000000050000000f ffffffff81094c36 ffff880116e03eb8
[  212.676084] Call Trace:
[  212.676084]  <IRQ>
[  212.676084]  [<ffffffffa041509f>] cp_interrupt+0x4ef/0x590 [8139cp]
[  212.676084]  [<ffffffff81094c36>] ? ktime_get+0x56/0xd0
[  212.676084]  [<ffffffff8108cf73>] handle_irq_event_percpu+0x53/0x170
[  212.676084]  [<ffffffff8108d0cc>] handle_irq_event+0x3c/0x60
[  212.676084]  [<ffffffff8108fdb5>] handle_fasteoi_irq+0x55/0xf0
[  212.676084]  [<ffffffff810045df>] handle_irq+0x1f/0x30
[  212.676084]  [<ffffffff81003c8b>] do_IRQ+0x5b/0xe0
[  212.676084]  [<ffffffff8142beaa>] common_interrupt+0x6a/0x6a
[  212.676084]  <EOI>
[  212.676084]  [<ffffffffa0416a21>] ? cp_start_xmit+0x621/0x97c [8139cp]
[  212.676084]  [<ffffffffa0416a09>] ? cp_start_xmit+0x609/0x97c [8139cp]
[  212.676084]  [<ffffffff81378ed9>] dev_hard_start_xmit+0x2c9/0x550
[  212.676084]  [<ffffffff813960a9>] sch_direct_xmit+0x179/0x1d0
[  212.676084]  [<ffffffff813793f3>] dev_queue_xmit+0x293/0x440
[  212.676084]  [<ffffffff813b0e46>] ip_finish_output+0x236/0x450
[  212.676084]  [<ffffffff810e59e7>] ? __alloc_pages_nodemask+0x187/0xb10
[  212.676084]  [<ffffffff813b10e8>] ip_output+0x88/0x90
[  212.676084]  [<ffffffff813afa64>] ip_local_out+0x24/0x30
[  212.676084]  [<ffffffff813aff0d>] ip_queue_xmit+0x14d/0x3e0
[  212.676084]  [<ffffffff813c6fd1>] tcp_transmit_skb+0x501/0x840
[  212.676084]  [<ffffffff813c8323>] tcp_write_xmit+0x1e3/0xb20
[  212.676084]  [<ffffffff81363237>] ? skb_page_frag_refill+0x87/0xd0
[  212.676084]  [<ffffffff813c8c8b>] tcp_push_one+0x2b/0x40
[  212.676084]  [<ffffffff813bb7e6>] tcp_sendmsg+0x926/0xc90
[  212.676084]  [<ffffffff813e1d21>] inet_sendmsg+0x61/0xc0
[  212.676084]  [<ffffffff8135e861>] sock_aio_write+0x101/0x120
[  212.676084]  [<ffffffff81107cf1>] ? vma_adjust+0x2e1/0x5d0
[  212.676084]  [<ffffffff812163e0>] ? timerqueue_add+0x60/0xb0
[  212.676084]  [<ffffffff81130b60>] do_sync_write+0x60/0x90
[  212.676084]  [<ffffffff81130d44>] ? rw_verify_area+0x54/0xf0
[  212.676084]  [<ffffffff81130f66>] vfs_write+0x186/0x190
[  212.676084]  [<ffffffff811317fd>] SyS_write+0x5d/0xa0
[  212.676084]  [<ffffffff814321e2>] system_call_fastpath+0x16/0x1b
[  212.676084] Code: ca 41 89 dc 41 29 cc 45 31 db 29 c2 41 89 c5 89 d0 45 29 c5 f7 d0 c1 e8 1f e9 43 ff ff ff 66 0f 1f 44 00 00 31 c0 e9 7b ff ff ff <0f> 0b eb fe 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 c7 47 40 00
[  212.676084] RIP  [<ffffffff8122e23f>] dql_completed+0x17f/0x190
------------[ cut here ]------------

When a skb has frags, bytes_compl plus skb->len nr_frags times in cp_tx().
It's not the correct value(actually, it should plus skb->len once) and it
will trigger the BUG_ON(bytes_compl > num_queued - dql->num_completed).
So only increase bytes_compl when finish sending all frags. pkts_compl also
has a wrong value, fix it too.

It's introduced by commit 871f0d4c ("8139cp: enable bql").

Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

r8169: check ALDPS bit and disable it if enabled for the 8168g

Windows driver will enable ALDPS function, but linux driver and firmware
do not have any configuration related to ALDPS function for 8168g.
So restart system to linux and remove the NIC cable, LAN enter ALDPS,
then LAN RX will be disabled.

This issue can be easily reproduced on dual boot windows and linux
system with RTL_GIGA_MAC_VER_40 chip.

Realtek said, ALDPS function can be disabled by configuring to PHY,
switch to page 0x0A43, reg0x10 bit2=0.

Signed-off-by: David Chang <dchang@suse.com>
Acked-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: clamp ->msg_namelen instead of returning an error

If kmsg->msg_namelen > sizeof(struct sockaddr_storage) then in the
original code that would lead to memory corruption in the kernel if you
had audit configured. If you didn't have audit configured it was
harmless.

There are some programs such as beta versions of Ruby which use too
large of a buffer and returning an error code breaks them. We should
clamp the ->msg_namelen value instead.

Fixes: 1661bf364ae9 ("net: heap overflow in __audit_sockaddr()")
Reported-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Tested-by: Eric Wong <normalperson@yhbt.net>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

af_packet: block BH in prb_shutdown_retire_blk_timer()

Currently we're using plain spin_lock() in prb_shutdown_retire_blk_timer(),
however the timer might fire right in the middle and thus try to re-aquire
the same spinlock, leaving us in a endless loop.

To fix that, use the spin_lock_bh() to block it.

Fixes: f6fb8f100b80 ("af-packet: TPACKET_V3 flexible buffer implementation.")
CC: "David S. Miller" <davem@davemloft.net>
CC: Daniel Borkmann <dborkman@redhat.com>
CC: Willem de Bruijn <willemb@google.com>
CC: Phil Sutter <phil@nwl.cc>
CC: Eric Dumazet <edumazet@google.com>
Reported-by: Jan Stancek <jstancek@redhat.com>
Tested-by: Jan Stancek <jstancek@redhat.com>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

macvtap: Do not double-count received packets

Currently macvlan will count received packets after calling each
vlans receive handler. Macvtap attempts to count the packet
yet again when the user reads the packet from the tap socket.
This code doesn't do this consistently either. Remove the
counting from macvtap and let only macvlan count received
packets.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Linux 3.13-rc2

Merge tag 'arm64-stable' of git://git./linux/kernel/git/cmarinas/linux-aarch64

Pull ARM64 fixes from Catalin Marinas:
- Remove preempt_count modifications in the arm64 IRQ handling code
   since that's already dealt with in generic irq_enter/irq_exit
- PTE_PROT_NONE bit moved higher up to avoid overlapping with the
   hardware bits (for PROT_NONE mappings which are pte_present)
- Big-endian fixes for ptrace support
- Asynchronous aborts unmasking while in the kernel
- pgprot_writecombine() change to create Normal NonCacheable memory
   rather than Device GRE

* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: Move PTE_PROT_NONE higher up
  arm64: Use Normal NonCacheable memory for writecombine
  arm64: debug: make aarch32 bkpt checking endian clean
  arm64: ptrace: fix compat registes get/set to be endian clean
  arm64: Unmask asynchronous aborts when in kernel mode
  arm64: dts: Reserve the memory used for secondary CPU release address
  arm64: let the core code deal with preempt_count

Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux

Pull s390 updates from Martin Schwidefsky:
"One performance improvement and a few bug fixes.  Two of the fixes
  deal with the clock related problems we have seen on recent kernels"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/mm: handle asce-type exceptions as normal page fault
  s390,time: revert direct ktime path for s390 clockevent device
  s390/time,vdso: convert to the new update_vsyscall interface
  s390/uaccess: add missing page table walk range check
  s390/mm: optimize copy_page
  s390/dasd: validate request size before building CCW/TCW request
  s390/signal: always restore saved runtime instrumentation psw bit

Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
"Some easy but needed fixes for i2c drivers since rc1"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: bcm2835: Linking platform nodes to adapter nodes
  i2c: omap: raw read and write endian fix
  i2c: i2c-bcm-kona: Fix module build
  i2c: i2c-diolan-u2c: different usb endpoints for DLN-2-U2C
  i2c: bcm-kona: remove duplicated include
  i2c: davinci: raw read and write endian fix

Merge branch 'for-3.13-fixes' of git://git./linux/kernel/git/tj/wq

Pull workqueue fixes from Tejun Heo:
"This contains one important fix.  The NUMA support added a while back
  broke ordering guarantees on ordered workqueues.  It was enforced by
  having single frontend interface with @max_active == 1 but the NUMA
  support puts multiple interfaces on unbound workqueues on NUMA
  machines thus breaking the ordered guarantee.  This is fixed by
  disabling NUMA support on ordered workqueues.

  The above and a couple other patches were sitting in for-3.12-fixes
  but I forgot to push that out, so they ended up waiting a bit too
  long.  My aplogies.

  Other fixes are minor"

* 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: fix pool ID allocation leakage and remove BUILD_BUG_ON() in init_workqueues
  workqueue: fix comment typo for __queue_work()
  workqueue: fix ordered workqueues in NUMA setups
  workqueue: swap set_cpus_allowed_ptr() and PF_NO_SETAFFINITY

Merge branch 'for-3.13-fixes' of git://git./linux/kernel/git/tj/libata

Pull libata fixes from Tejun Heo:
"libata device removal path was removing parent device node before its
  child, which is mostly harmless but triggers warning after recent
  sysfs changes.  Rafael's patch fixes the order.

  Other than that, minor controller-specific fixes and device ID
  additions"

* 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ATA: Fix port removal ordering
  ahci: add Marvell 9230 to the AHCI PCI device list
  ata: fix acpi_bus_get_device() return value check
  pata_arasan_cf: add missing clk_disable_unprepare() on error path
  ahci: add support for IBM Akebono platform device

Merge branch 'for-3.13-fixes' of git://git./linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:
"Fixes for three issues.

   - cgroup destruction path could swamp system_wq possibly leading to
     deadlock.  This actually seems to happen in the wild with memcg
     because memcg destruction path adds nested dependency on system_wq.

     Resolved by isolating cgroup destruction work items on its
     dedicated workqueue.

   - Possible locking context deadlock through seqcount reported by
     lockdep

   - Memory leak under certain conditions"

* 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: fix cgroup_subsys_state leak for seq_files
  cpuset: Fix memory allocator deadlock
  cgroup: use a dedicated workqueue for cgroup destruction

Merge tag 'sound-3.13-rc2' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
"Quite a few HD-Audio fixes, a WUSB audio fix and a fix for FireWire
  audio.  The HD-audio part contains a couple of fixes for the generic
  parser, and these are the only intrusive fixes.  The rest are mostly
  device-specific fixes"

* tag 'sound-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Add LFE chmap to ASUS ET2700
  ALSA: hda - Initialize missing bass speaker pin for ASUS AIO ET2700
  ALSA: hda - limit mic boost on Asus UX31[A,E]
  ALSA: hda - Check leaf nodes to find aamix amps
  ALSA: hda - Fix hp-mic mode without VREF bits
  ALSA: hda - Create Headhpone Mic Jack Mode when really needed
  ALSA: usb: use multiple packets per urb for Wireless USB inbound audio
  ALSA: hda - Enable mute/mic-mute LEDs for more Thinkpads with Conexant codec
  ALSA: hda - Drop bus->avoid_link_reset flag
  ALSA: hda/realtek - Set pcbeep amp for ALC668
  ALSA: hda/realtek - Add support of ALC231 codec
  ALSA: firewire-lib: fix wrong value for FDF field as an empty packet

Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull vfs dentry reference count fix from Al Viro.

This fixes a possible inode_permission NULL pointer dereference (and
other problems) that were due to the root dentry count being decremented
too much. In commit 48a066e72d97 ("RCU'd vfsmounts") the placement of
clearing the LOOKUP_RCU bit changed, and we then returned failure of
incrementing the lockref on the parent dentry with LOOKUP_RCU cleared.

But that meant we needed to go through the same cleanup routines that
the later failures did wrt LOOKUP_ROOT and nd->root.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fix bogus path_put() of nd->root after some unlazy_walk() failures

Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm qxl leak fix from Dave Airlie:
"As usual 5 mins after I send a trivial pull fix I find a real bug!

  This fixes a memory leak and I'd like to get it into stable queue
  asap"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/qxl: fix memory leak in release list handling

arm64: Move PTE_PROT_NONE higher up

PTE_PROT_NONE means that a pte is present but does not have any
read/write attributes. However, setting the memory type like
pgprot_writecombine() is allowed and such bits overlap with
PTE_PROT_NONE. This causes mmap/munmap issues in drivers that change the
vma->vm_pg_prot on PROT_NONE mappings.

This patch reverts the PTE_FILE/PTE_PROT_NONE shift in commit
59911ca4325d (ARM64: mm: Move PTE_PROT_NONE bit) and moves PTE_PROT_NONE
together with the other software bits.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Steve Capper <steve.capper@linaro.org>
Cc: <stable@vger.kernel.org> # 3.11+

arm64: Use Normal NonCacheable memory for writecombine

This provides better performance compared to Device GRE and also allows
unaligned accesses. Such memory is intended to be used with standard RAM
(e.g. framebuffers) and not I/O.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

fix bogus path_put() of nd->root after some unlazy_walk() failures

Failure to grab reference to parent dentry should go through the
same cleanup as nd->seq mismatch. As it is, we might end up with
caller thinking it needs to path_put() nd->root, with obvious
nasty results once we'd hit that bug enough times to drive the
refcount of root dentry all the way to zero...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

be2net: call napi_disable() for all event queues

The recent be2net commit 6384a4d (adds a support for busy polling)
introduces a regression that results in kernel crash. It incorrectly
modified be_close() so napi_disable() is called only for the first queue.
This breaks a correct pairing of napi_enable/_disable for the rest
of event queues and causes a crash in subsequent be_open() call.

v2: Applied suggestions from Sathya

Fixes: 6384a4d ("be2net: add support for ndo_busy_poll")
Cc: Sathya Perla <sathya.perla@emulex.com>
Cc: Subbu Seetharaman <subbu.seetharaman@emulex.com>
Cc: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Acked-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Revert "be2net: call napi_disable() for all event queues"

This reverts commit 55485e7b417b640870b14eceec4cfbcb2b3e7a92.

I applied the wrong version of this patch, the right one is coming up
next.

Signed-off-by: David S. Miller <davem@davemloft.net>

be2net: call napi_disable() for all event queues

The recent be2net commit 6384a4d (adds a support for busy polling)
introduces a regression that results in kernel crash. It incorrectly
modified be_close() so napi_disable() is called only for the first queue.
This breaks a correct pairing of napi_enable/_disable for the rest
of event queues and causes a crash in subsequent be_open() call.

Cc: Sathya Perla <sathya.perla@emulex.com>
Cc: Subbu Seetharaman <subbu.seetharaman@emulex.com>
Cc: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Acked-by: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: remove outdated comment for ipv4 and ipv6 protocol handler

since f9242b6b28d61295f2bf7e8adfb1060b382e5381
inet: Sanitize inet{,6} protocol demux.

there are not pretended hash tables for ipv4 or
ipv6 protocol handler.

Signed-off-by: Baker Zhang <Baker.kernel@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

via-velocity: fix netif_receive_skb use in irq disabled section.

2fdac010bdcf10a30711b6924612dfc40daf19b8 ("via-velocity.c: update napi
implementation") overlooked an irq disabling spinlock when the Rx part
of the NAPI poll handler was converted from netif_rx to netif_receive_skb.

NAPI Rx processing can be taken out of the locked section with a pair of
napi_{disable / enable} since it only races with the MTU change function.

An heavier rework of the NAPI locking would be able to perform NAPI Tx
before Rx where I simply removed one of velocity_tx_srv calls.

References: https://bugzilla.redhat.com/show_bug.cgi?id=1022733
Fixes: 2fdac010bdcf (via-velocity.c: update napi implementation)
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Tested-by: Alex A. Schmidt <aaschmidt1@gmail.com>
Cc: Jamie Heilman <jamie@audible.transient.net>
Cc: Michele Baldessari <michele@acksyn.org>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'fixes-for-3.13-20131127' of git://gitorious.org/linux-can/linux-can

Marc Kleine-Budde says:

====================
here's a pull request for v3.13, i.e. net/master. It consists of a patch by
Oliver Hartkopp which fixes some corner cases in the interrupt handler of the
sja1000 driver. Then there are two patches for the c_can dirver. One by me,
which fixes a runtime pm related "scheduling while atomic" error and patch by
Holger Bechtold that fixes the calculation of the transmitted bytes.

The fourth patch is by me, it corrects the clock usage in the flexcan
driver.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

xen-netback: include definition of csum_ipv6_magic

We are now using csum_ipv6_magic, include the appropriate header.
Avoids the following error:

drivers/net/xen-netback/netback.c:1313:4: error: implicit declaration of function 'csum_ipv6_magic' [-Werror=implicit-function-declaration]
tcph->check = ~csum_ipv6_magic(&ipv6h->saddr,

Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

sit: use kfree_skb to replace dev_kfree_skb

In failure case, we should use kfree_skb not
dev_kfree_skb to free skbuff, dev_kfree_skb
is defined as consume_skb.

Trace takes advantage of this point.

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

macvtap: fix tx_dropped counting error

After commit 8ffab51b3dfc54876f145f15b351c41f3f703195
(macvlan: lockless tx path), tx stat counter were converted to percpu stat
structure. So we need use to this also for tx_dropped in macvtap. Otherwise, the
management won't notice the dropping packet in macvtap tx path.

Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Vlad Yasevich <vyasevic@redhat.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

phy: Add Vitesse 8514 phy ID

Phy is compatible with Vitesse 82xx

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

sctp: Restore 'resent' bit to avoid retransmitted chunks for RTT measurements

Currently retransmitted DATA chunks could also be used for
RTT measurements since there are no flag to identify whether
the transmitted DATA chunk is a new one or a retransmitted one.
This problem is introduced by commit ae19c5486 ("sctp: remove
'resent' bit from the chunk") which inappropriately removed the
'resent' bit completely, instead of doing this, we should set
the resent bit only for the retransmitted DATA chunks.

Signed-off-by: Xufeng Zhang <xufeng.zhang@windriver.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

genetlink/pmcraid: use proper genetlink multicast API

The pmcraid driver is abusing the genetlink API and is using its
family ID as the multicast group ID, which is invalid and may
belong to somebody else (and likely will.)

Make it use the correct API, but since this may already be used
as-is by userspace, reserve a family ID for this code and also
reserve that group ID to not break userspace assumptions.

My previous patch broke event delivery in the driver as I missed
that it wasn't using the right API and forgot to update it later
in my series.

While changing this, I noticed that the genetlink code could use
the static group ID instead of a strcmp(), so also do that for
the VFS_DQUOT family.

Cc: Anil Ravindranath <anil_ravindranath@pmc-sierra.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

genetlink: Fix uninitialized variable in genl_validate_assign_mc_groups()

net/netlink/genetlink.c: In function ‘genl_validate_assign_mc_groups’:
net/netlink/genetlink.c:217: warning: ‘err’ may be used uninitialized in this
function

Commit 2a94fe48f32ccf7321450a2cc07f2b724a444e5b ("genetlink: make multicast
groups const, prevent abuse") split genl_register_mc_group() in multiple
functions, but dropped the initialization of err.

Initialize err to zero to fix this.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

tg3: Convert to use hwmon_device_register_with_groups

Use new hwmon API to simplify code, provide missing mandatory 'name'
sysfs attribute, and attach hwmon attributes to hwmon device instead
of pci device.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

bonding: disable arp and enable mii monitoring when bond change to no uses arp mode

Because the ARP monitoring is not support for 802.3ad, but I still
could change the mode to 802.3ad from ab mode while ARP monitoring
is running, it is incorrect.

So add a check for 802.3ad in bonding_store_mode to fix the problem,
and make a new macro BOND_NO_USES_ARP() to simplify the code.

v2: according to the Dan Williams's suggestion, bond mode is the most
    important bond option, it should override any of the other sub-options.
    So when the mode is changed, the conficting values should be cleared
    or reset, otherwise the user has to duplicate more operations to modify
    the logic. I disable the arp and enable mii monitoring when the bond mode
    is changed to AB, TB and 8023AD if the arp interval is true.

v3: according to the Nik's suggestion, the default value of miimon should need
    a name, there is several place to use it, and the bond_store_arp_interval()
    could use micro BOND_NO_USES_ARP to make the code more simpify.

Suggested-by: Dan Williams <dcbw@redhat.com>
Suggested-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diag: warn about missing first netlink attribute

The first netlink attribute (value 0) must always be defined as none/unspec.
This is correctly done in inet_diag.h, but other diag interfaces are wrong.

Because we cannot change an existing API, I add a comment to point the mistake
and avoid to propagate it in a new diag API in the future.

CC: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drm/qxl: fix memory leak in release list handling

wow no idea how I got this far without seeing this,
leaking the entries in the list makes kmalloc-64 slab grow.

References: https://bugzilla.kernel.org/show_bug.cgi?id=65121
Cc: stable@vger.kernel.org
Reported-by: Matthew Stapleton <matthew4196@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

arm64: debug: make aarch32 bkpt checking endian clean

The current breakpoint instruction checking code for A32 is not endian
clean. Fix this with appropriate byte-swapping when retrieving
instructions.

Signed-off-by: Matthew Leach <matthew.leach@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arm64: ptrace: fix compat registes get/set to be endian clean

On a BE system the wrong half of the X registers is retrieved/written
when attempting to get/set the value of aarch32 registers through
ptrace.

Ensure that types are the correct width so that the relevant
casting occurs.

Signed-off-by: Matthew Leach <matthew.leach@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Merge tag 'gpio-v3.13-2' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
"Here us a bunch of patches for the v3.13 series.  Most important stuff
  is related to fixes and documentation for the new GPIO descriptor API.
  If the diffstat is scary you'll notice most of it is to
  Documentation/*:

   - A big slew of documentation for the gpiod transition that happened
     in the merge window, no semantic effect, but we should provide
     proper documentation with the new API.

   - Fix flags related to the new API.

   - Fix to the find_chip_by_name() lookup function related to the new
     API.

   - Fix of_find_gpio() when not using device tree.

   - Bug fix for the TB10x direction setting.

   - Error path fixes from Dan Carpenter.

   - Nasty IRQdomain bug relating to taking an unitialized spinlock.

   - Minor fixes here and there"

* tag 'gpio-v3.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: bcm281xx: Fix return value of bcm_kona_gpio_get()
  gpio: pl061: move irqdomain initialization
  gpio: ucb1400: Add MODULE_ALIAS
  gpiolib: fix of_find_gpio() when OF not defined
  gpio: fix memory leak in error path
  gpio: rcar: NULL dereference on error in probe()
  gpio: msm: make msm_gpio.summary_irq signed for error handling
  gpio: mvebu: make mvchip->irqbase signed for error handling
  gpiolib: use dedicated flags for GPIO properties
  gpiolib: fix find_chip_by_name()
  Documentation: gpiolib: document new interface
  gpio: tb10x: Set output value before setting direction to output

Merge tag 'md/3.13-fixes' of git://neil.brown.name/md

Pull md fixes from Neil Brown:
"Three bug fixes for md in 3.13-rc

  All recent regressions, one in 3.12 so marked for -stable"

* tag 'md/3.13-fixes' of git://neil.brown.name/md:
  md/raid5: fix newly-broken locking in get_active_stripe.
  md: test mddev->flags more safely in md_check_recovery.
  md/raid5: fix new memory-reference bug in alloc_thread_groups.

Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
"SMB3 "validate negotiate" is needed to prevent certain types of
  downgrade attacks.

  Also changes SMB2/SMB3 copy offload from using the BTRFS copy ioctl
  (BTRFS_IOC_CLONE) to a cifs specific ioctl (CIFS_IOC_COPYCHUNK_FILE)
  to address Christoph's comment that there are semantic differences
  between requesting copy offload in which copy-on-write is mandatory
  (as in the BTRFS ioctl) and optional in the SMB2/SMB3 case.  Also
  fixes SMB2/SMB3 copychunk for large files"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  [CIFS] Do not use btrfs refcopy ioctl for SMB2 copy offload
  Check SMB3 dialects against downgrade attacks
  Removed duplicated (and unneeded) goto
  CIFS: Fix SMB2/SMB3 Copy offload support (refcopy) for large files

kernel/extable: fix address-checks for core_kernel and init areas

The init_kernel_text() and core_kernel_text() functions should not
include the labels _einittext and _etext when checking if an address is
inside the .text or .init sections.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

irqchip: Gic: fix boot for chained gics

As of c0114709ed: "irqchip: gic: Perform the gic_secondary_init() call
via CPU notifier", booting on a platform with chained gics (e.g.
Realview EB ARM11MPCore) will result in the gic_cpu_notifier being
registered twice, corrupting the cpu notifier list and rendering the
platform unbootable.

This patch ensures that we only register the notifier for the first
gic, allowing platforms with chained gics to boot. At the same time we
limit the pointlessly duplicated calls to set_smp_cross_call and
set_handle_irq to the first gic registered.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: marc.zyngier@arm.com
Cc: rob.herring@calxeda.com
Cc: olof@lixom.net
Link: http://lkml.kernel.org/r/1385648500-29048-1-git-send-email-mark.rutland@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

ALSA: hda - Add LFE chmap to ASUS ET2700

As the previous commit 1f0bbf03cb82 added the pin config for the bass
speaker, this patch adds the corresponding LFE-only channel map on
ASUS ET2700.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=65961
Signed-off-by: Takashi Iwai <tiwai@suse.de>