From: Arjan van de Ven <arjan@linux.intel.com>
Date: Mon, 24 Nov 2008 00:57:36 +0000 (-0800)
Subject: input: replace spin_lock_bh with spin_lock_irqsave in ml_ff_playback
X-Git-Tag: v2.6.28-rc7~59
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=211f05a034f49586fdd071abd174853217ec29ee;p=pandora-kernel.git

input: replace spin_lock_bh with spin_lock_irqsave in ml_ff_playback

ml_ff_playback() uses spin_(un)lock_bh. However this function is called
with interrupts disabled from erase_effect() in drivers/input/ff-core.c:196.

This is not permitted, and will result in a WARN_ON in the bottom half handling code.
This patch changes this function to just use spin_lock_irqsave() instead, solving
the problem and simplifying the locking logic.

This was reported as entry #106559 in kerneloops.org

Reported-by: kerneloops.org
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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