From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 18 Mar 2011 06:31:53 +0000 (+0100)
Subject: ALSA: aloop - Fix possible IRQ lock inversion
X-Git-Tag: v2.6.37.5~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bffb8879ed2e5da445a280a8869ec608f21500e1;p=pandora-kernel.git

ALSA: aloop - Fix possible IRQ lock inversion

commit 98d21df431ad55281e1abf780f8d51e3391900b2 upstream.

loopback_pos_update() can be called in the timer callback, thus the lock
held should be irq-safe.  Otherwise you'll get AB/BA deadlock together
with substream->self_group.lock.

Reported-and-tested-by: Knut Petersen <Knut_Petersen@t-online.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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