From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 13 Jan 2015 09:53:20 +0000 (+0100)
Subject: ALSA: ak411x: Fix stall in work callback
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~181^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4161b4505f1690358ac0a9ee59845a7887336b21;p=pandora-kernel.git

ALSA: ak411x: Fix stall in work callback

When ak4114 work calls its callback and the callback invokes
ak4114_reinit(), it stalls due to flush_delayed_work().  For avoiding
this, control the reentrance by introducing a refcount.  Also
flush_delayed_work() is replaced with cancel_delayed_work_sync().

The exactly same bug is present in ak4113.c and fixed as well.

Reported-by: Pavel Hofman <pavel.hofman@ivitera.com>
Acked-by: Jaroslav Kysela <perex@perex.cz>
Tested-by: Pavel Hofman <pavel.hofman@ivitera.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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