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authorTakashi Iwai <tiwai@suse.de>2015-01-13 10:53:20 +0100
committerTakashi Iwai <tiwai@suse.de>2015-01-28 22:29:20 +0100
commit4161b4505f1690358ac0a9ee59845a7887336b21 (patch)
tree627a37684dae207307c59322d7673371d7f346a0 /include/sound
parent0767e95bb96d7fdddcd590fb809e6975d93aebc5 (diff)
downloadop-kernel-dev-4161b4505f1690358ac0a9ee59845a7887336b21.zip
op-kernel-dev-4161b4505f1690358ac0a9ee59845a7887336b21.tar.gz
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>
Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/ak4113.h2
-rw-r--r--include/sound/ak4114.h2
2 files changed, 2 insertions, 2 deletions
diff --git a/include/sound/ak4113.h b/include/sound/ak4113.h
index 2609048..3a34f6e 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 52f02a6..069299a 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];
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