From: John Stultz <john.stultz@linaro.org>
Date: Thu, 6 Sep 2012 21:19:06 +0000 (+0200)
Subject: PM / wakeup: Use irqsave/irqrestore for events_lock
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~39^2~9^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4955070974ecfa0b1ae9d2506f529460fd3a4b0b;p=pandora-kernel.git

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>
---

Reading git-diff-tree failed