From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 11 Dec 2009 11:51:05 +0000 (+0100)
Subject: ALSA: hrtimer - Fix lock-up
X-Git-Tag: v2.6.33-rc1~294^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fcfdebe70759c74e2e701f69aaa7f0e5e32cf5a6;p=pandora-kernel.git

ALSA: hrtimer - Fix lock-up

The timer stop callback can be called from snd_timer_interrupt(), which
is called from the hrtimer callback.  Since hrtimer_cancel() waits for
the callback completion, this eventually results in a lock-up.

This patch fixes the problem by just toggling a flag at stop callback
and call hrtimer_cancel() later.

Reported-and-tested-by: Wojtek Zabolotny <W.Zabolotny@elka.pw.edu.pl>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

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