linux-stable.git/drivers, branch v3.4.5

drivers/rtc/rtc-mxc.c: fix irq enabled interrupts warning

2012-07-16T16:04:44+00:00

commit b59f6d1febd6cbe9fae4589bf72da0ed32bc69e0 upstream.

Fixes

  WARNING: at irq/handle.c:146 handle_irq_event_percpu+0x19c/0x1b8()
  irq 25 handler mxc_rtc_interrupt+0x0/0xac enabled interrupts
  Modules linked in:
   (unwind_backtrace+0x0/0xf0) from (warn_slowpath_common+0x4c/0x64)
   (warn_slowpath_common+0x4c/0x64) from (warn_slowpath_fmt+0x30/0x40)
   (warn_slowpath_fmt+0x30/0x40) from (handle_irq_event_percpu+0x19c/0x1b8)
   (handle_irq_event_percpu+0x19c/0x1b8) from (handle_irq_event+0x28/0x38)
   (handle_irq_event+0x28/0x38) from (handle_level_irq+0x80/0xc4)
   (handle_level_irq+0x80/0xc4) from (generic_handle_irq+0x24/0x38)
   (generic_handle_irq+0x24/0x38) from (handle_IRQ+0x30/0x84)
   (handle_IRQ+0x30/0x84) from (avic_handle_irq+0x2c/0x4c)
   (avic_handle_irq+0x2c/0x4c) from (__irq_svc+0x40/0x60)
  Exception stack(0xc050bf60 to 0xc050bfa8)
  bf60: 00000001 00000000 003c4208 c0018e20 c050a000 c050a000 c054a4c8 c050a000
  bf80: c05157a8 4117b363 80503bb4 00000000 01000000 c050bfa8 c0018e2c c000e808
  bfa0: 60000013 ffffffff
   (__irq_svc+0x40/0x60) from (default_idle+0x1c/0x30)
   (default_idle+0x1c/0x30) from (cpu_idle+0x68/0xa8)
   (cpu_idle+0x68/0xa8) from (start_kernel+0x22c/0x26c)

Signed-off-by: Benoît Thébaudeau 
Cc: Alessandro Zummo 
Cc: Sascha Hauer 
Acked-by: Uwe Kleine-König 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

drivers/rtc/rtc-ab8500.c: use IRQF_ONESHOT when requesting a threaded IRQ

2012-07-16T16:04:44+00:00

commit 3cfd16a551dc0c188160e1765168a04baf2d3198 upstream.

This driver's IRQ registration is failing because the kernel now forces
IRQs to be ONESHOT if no IRQ handler is passed.

Signed-off-by: Lee Jones 
Cc: Alessandro Zummo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

drivers/rtc/rtc-spear.c: fix use-after-free in spear_rtc_remove()

2012-07-16T16:04:44+00:00

commit 2a643893e50fde71d7ba84b5592ec61b467b9ab6 upstream.

`config' is freed and is then used in the rtc_device_unregister() call,
causing a kernel panic.

Signed-off-by: Devendra Naga 
Reviewed-by: Viresh Kumar 
Cc: Alessandro Zummo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

staging:iio:ad7606: Re-add missing scale attribute

2012-07-16T16:04:43+00:00

commit 279bf2e57c30c9a4482b2b6ede11b31c41e35e78 upstream.

Commit 50ac23be ("staging:iio:adc:ad7606 add local define for chan_spec
structures.") accidentally removed the scale info_mask flag. This patch
adds it back again.

Signed-off-by: Lars-Peter Clausen 
Acked-by: Jonathan Cameron 
Signed-off-by: Greg Kroah-Hartman 
[herton: Backported to 3.4: info_mask was not used yet with another flag]
Signed-off-by: Herton R. Krzesinski 
Signed-off-by: Greg Kroah-Hartman

md/raid5: Do not add data_offset before call to is_badblock

2012-07-16T16:04:43+00:00

commit 6c0544e255dd6582a9899572e120fb55d9f672a4 upstream.

In chunk_aligned_read() we are adding data_offset before calling
is_badblock.  But is_badblock also adds data_offset, so that is bad.

So move the addition of data_offset to after the call to
is_badblock.

This bug was introduced by commit 31c176ecdf3563140e639
     md/raid5: avoid reading from known bad blocks.
which first appeared in 3.0.  So that patch is suitable for any
-stable kernel from 3.0.y onwards.  However it will need minor
revision for most of those (as the comment didn't appear until
recently).

Signed-off-by: majianpeng 
Signed-off-by: NeilBrown 
[bwh: Backported to 3.2: ignored missing comment]
Signed-off-by: Ben Hutchings 
Signed-off-by: Greg Kroah-Hartman

drm/i915: rip out the PM_IIR WARN

2012-07-16T16:04:43+00:00

commit 58bf8062d0b293b8e1028e5b0342082002886bd4 upstream.

After banging my head against this for the past few months, I still
don't see how this could possible race under the premise that once an
irq bit is masked in PM_IMR and reset in PM_IIR it won't show up again
until we unmask it in PM_IMR.

Still, we have reports of this being seen in the wild. Now Bspec has
this little bit of lovely language in the PMIIR register:

Public SNB Docs, Vol3Part2, 2.5.14 "PMIIR":

"For each bit, the IIR can store a second pending interrupt if two or
more of the same interrupt conditions occur before the first condition
is cleared. Upon clearing the interrupt, the IIR bit will momentarily
go low, then return high to indicate there is another interrupt
pending."

Now if we presume that PMIMR only prevent new interrupts from being
queued, we could easily end up masking an interrupt and clearing it,
but the 2nd pending interrupt setting the bit in PMIIR right away
again. Which leads, the next time the irq handler runs, to hitting the
WARN.

Also, no bad side effects of this have ever been reported. And we've
tracked down our issues with the gpu turbo getting stuck to bogus
interrupt generation limits in th RPLIMIT register.

So let's just rip out this WARN as bogus and call it a day. The only
shallow thing here is that this 2-deep irq queue in the hw makes you
wonder how racy the windows irq handler is ...

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=42907
Acked-by: Chris Wilson 
Signed-Off-by: Daniel Vetter 
Signed-off-by: Greg Kroah-Hartman

drm/i915: Refactor the deferred PM_IIR handling into a single function

2012-07-16T16:04:43+00:00

commit fc6826d1dcd65f3d1e9a5377678882e4e08f02be upstream.

This function, along with the registers and deferred work hander, are
all shared with SandyBridge, IvyBridge and their variants. So remove the
duplicate code into a single function.

Signed-off-by: Chris Wilson 
Reviewed-by: Ben Widawsky 
Signed-Off-by: Daniel Vetter 
[bwh: Backported to 3.2: adjust context; drop changes for Valley View]
Signed-off-by: Ben Hutchings 
Signed-off-by: Greg Kroah-Hartman

net/wireless: ipw2x00: add supported cipher suites to wiphy initialization

2012-07-16T16:04:42+00:00

commit a141e6a0097118bb35024485f1faffc0d9042f5c upstream.

Driver doesn't report its supported cipher suites through cfg80211
interface. It still uses wext interface and probably will not work
through nl80211, but will at least correctly advertise supported
features.

Bug was reported by Omar Siam.
https://bugzilla.kernel.org/show_bug.cgi?id=43049

Signed-off-by: Stanislav Yakovlev 
Signed-off-by: John W. Linville 
Cc: Josh Boyer 
Signed-off-by: Greg Kroah-Hartman

macvtap: zerocopy: validate vectors before building skb

2012-07-16T16:04:42+00:00

commit b92946e2919134ebe2a4083e4302236295ea2a73 upstream.

There're several reasons that the vectors need to be validated:

- Return error when caller provides vectors whose num is greater than UIO_MAXIOV.
- Linearize part of skb when userspace provides vectors grater than MAX_SKB_FRAGS.
- Return error when userspace provides vectors whose total length may exceed
- MAX_SKB_FRAGS * PAGE_SIZE.

Signed-off-by: Jason Wang 
Signed-off-by: Michael S. Tsirkin 
Cc: Josh Boyer 
Signed-off-by: Greg Kroah-Hartman

rtl8187: ->brightness_set can not sleep

2012-07-16T16:04:42+00:00

commit 0fde0a8cfd0ede7f310d6a681c8e5a7cb3e32406 upstream.

Fix:

BUG: sleeping function called from invalid context at kernel/workqueue.c:2547
in_atomic(): 1, irqs_disabled(): 0, pid: 629, name: wpa_supplicant
2 locks held by wpa_supplicant/629:
 #0:  (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x14/0x20
 #1:  (&trigger->leddev_list_lock){.+.?..}, at: [] led_trigger_event+0x21/0x80
Pid: 629, comm: wpa_supplicant Not tainted 3.3.0-0.rc3.git5.1.fc17.i686
Call Trace:
 [] __might_sleep+0x126/0x1d0
 [] wait_on_work+0x2c/0x1d0
 [] __cancel_work_timer+0x6a/0x120
 [] cancel_delayed_work_sync+0x10/0x20
 [] rtl8187_led_brightness_set+0x82/0xf0 [rtl8187]
 [] led_trigger_event+0x5c/0x80
 [] ieee80211_led_radio+0x1d/0x40 [mac80211]
 [] ieee80211_stop_device+0x13/0x230 [mac80211]

Removing _sync is ok, because if led_on work is currently running
it will be finished before led_off work start to perform, since
they are always queued on the same mac80211 local->workqueue.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=795176

Signed-off-by: Stanislaw Gruszka 
Acked-by: Larry Finger 
Acked-by: Hin-Tak Leung 
Signed-off-by: John W. Linville 
Cc: Josh Boyer 
Signed-off-by: Greg Kroah-Hartman