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| author | Takashi Iwai <tiwai@suse.de> | 2015-01-13 10:53:20 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-11 14:48:17 +0800 |
| commit | 15a9c9addacfc62780b7908e15e4fc87b508791f (patch) | |
| tree | e28bd75fcdc3c2ed5e2ba2b0278ffa609374c998 /include | |
| parent | 48cc051f29814e8c8d4498a4fb99204fa31e30e2 (diff) | |
| download | lwn-15a9c9addacfc62780b7908e15e4fc87b508791f.tar.gz lwn-15a9c9addacfc62780b7908e15e4fc87b508791f.zip | |
ALSA: ak411x: Fix stall in work callback
commit 4161b4505f1690358ac0a9ee59845a7887336b21 upstream.
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>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sound/ak4113.h | 2 | ||||
| -rw-r--r-- | include/sound/ak4114.h | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/include/sound/ak4113.h b/include/sound/ak4113.h index 2609048c1d44..3a34f6edc2d1 100644 --- a/include/sound/ak4113.h +++ b/include/sound/ak4113.h @@ -286,7 +286,7 @@ struct ak4113 { ak4113_write_t *write; ak4113_read_t *read; void *private_data; - unsigned int init:1; + atomic_t wq_processing; spinlock_t lock; unsigned char regmap[AK4113_WRITABLE_REGS]; struct snd_kcontrol *kctls[AK4113_CONTROLS]; diff --git a/include/sound/ak4114.h b/include/sound/ak4114.h index 3ce69fd92523..69441161009c 100644 --- a/include/sound/ak4114.h +++ b/include/sound/ak4114.h @@ -168,7 +168,7 @@ struct ak4114 { ak4114_write_t * write; ak4114_read_t * read; void * private_data; - unsigned int init: 1; + atomic_t wq_processing; spinlock_t lock; unsigned char regmap[7]; unsigned char txcsb[5]; |