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| author | John Stultz <john.stultz@linaro.org> | 2012-09-06 21:19:06 (GMT) |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-09-06 21:19:06 (GMT) |
| commit | 4955070974ecfa0b1ae9d2506f529460fd3a4b0b (patch) | |
| tree | 7eaf09c1756fa1bf2534998a60b9543cc411d79d /kernel/power/poweroff.c | |
| parent | 5834ec3aea8a84b70efeb52ee91a8f8b1042cd2a (diff) | |
| download | linux-4955070974ecfa0b1ae9d2506f529460fd3a4b0b.tar.xz | |
PM / wakeup: Use irqsave/irqrestore for events_lock
Jon Medhurst (Tixy) recently noticed a problem with the
events_lock usage. One of the Android patches that uses
wakeup_sources calls wakeup_source_add() with irqs disabled.
However, the event_lock usage in wakeup_source_add() uses
spin_lock_irq()/spin_unlock_irq(), which reenables interrupts.
This results in lockdep warnings.
The fix is to use spin_lock_irqsave()/spin_lock_irqrestore()
instead for the events_lock.
References: https://bugs.launchpad.net/linaro-landing-team-arm/+bug/1037565
Reported-and-debugged-by: Jon Medhurst (Tixy) <tixy@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'kernel/power/poweroff.c')
0 files changed, 0 insertions, 0 deletions