Since commit 5bbb1ab5bd ("control: use counting semaphore as write lock for ELEM_WRITE operation"), this has been locking the controls including their values, not just the list of controls.
Signed-off-by: Oswald Buddenhagen oswald.buddenhagen@gmx.de --- include/sound/core.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/sound/core.h b/include/sound/core.h index 3edc4ab08774..4ea5f66b59d7 100644 --- a/include/sound/core.h +++ b/include/sound/core.h @@ -98,7 +98,7 @@ struct snd_card {
struct device ctl_dev; /* control device */ unsigned int last_numid; /* last used numeric ID */ - struct rw_semaphore controls_rwsem; /* controls list lock */ + struct rw_semaphore controls_rwsem; /* controls lock (list and values) */ rwlock_t ctl_files_rwlock; /* ctl_files list lock */ int controls_count; /* count of all controls */ size_t user_ctl_alloc_size; // current memory allocation by user controls.