ALSA: ak411x: Fix stall in work callback
authorTakashi Iwai <tiwai@suse.de>
Tue, 13 Jan 2015 09:53:20 +0000 (10:53 +0100)
committerTakashi Iwai <tiwai@suse.de>
Wed, 28 Jan 2015 21:29:20 +0000 (22:29 +0100)
commit4161b4505f1690358ac0a9ee59845a7887336b21
tree627a37684dae207307c59322d7673371d7f346a0
parent0767e95bb96d7fdddcd590fb809e6975d93aebc5
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>
include/sound/ak4113.h
include/sound/ak4114.h
sound/i2c/other/ak4113.c
sound/i2c/other/ak4114.c