diff options
| author | Takashi Iwai <tiwai@suse.de> | 2015-01-13 10:53:20 +0100 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2015-02-10 13:38:44 +0000 |
| commit | 544d7ed59ef7b408e2ff0607b1c64e58936e5def (patch) | |
| tree | 4322110598de34c8b8fb9352346684ff4a5815e9 /include/sound | |
| parent | 37af707c6d4b2521a6412ba32f41822e10b267a8 (diff) | |
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: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'include/sound')
| -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 52f02a60dba7..069299a88915 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[6]; unsigned char txcsb[5]; |