diff options
| author | Takashi Iwai <tiwai@suse.de> | 2019-01-13 09:35:17 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-01-21 16:39:35 +0100 |
| commit | 73365cb10b280e539bad14e129e0d8434418bb79 (patch) | |
| tree | 578b57c2edbaafecc208d65fbb1518d5044a84c9 /sound/core/pcm_native.c | |
| parent | d819fb21eecc70972c4a3681f2542e1ddcc1ca13 (diff) | |
| download | linux-73365cb10b280e539bad14e129e0d8434418bb79.tar.bz2 | |
ALSA: pcm: Unify snd_pcm_group initialization
There are multiple open codes that initialize the same object.
Create a common helper function instead.
Also, use kzalloc() to be safer at creating a group object, and move
the initialization out of the critical section.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm_native.c')
| -rw-r--r-- | sound/core/pcm_native.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index c72dfd1fc1ed..9e4e289e5703 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -100,6 +100,13 @@ static inline void down_write_nonfifo(struct rw_semaphore *lock) msleep(1); } +void snd_pcm_group_init(struct snd_pcm_group *group) +{ + spin_lock_init(&group->lock); + mutex_init(&group->mutex); + INIT_LIST_HEAD(&group->substreams); +} + #define PCM_LOCK_DEFAULT 0 #define PCM_LOCK_IRQ 1 #define PCM_LOCK_IRQSAVE 2 @@ -1969,11 +1976,12 @@ static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) } pcm_file = f.file->private_data; substream1 = pcm_file->substream; - group = kmalloc(sizeof(*group), GFP_KERNEL); + group = kzalloc(sizeof(*group), GFP_KERNEL); if (!group) { res = -ENOMEM; goto _nolock; } + snd_pcm_group_init(group); down_write_nonfifo(&snd_pcm_link_rwsem); write_lock_irq(&snd_pcm_link_rwlock); if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || @@ -1989,9 +1997,6 @@ static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) if (!snd_pcm_stream_linked(substream)) { substream->group = group; group = NULL; - spin_lock_init(&substream->group->lock); - mutex_init(&substream->group->mutex); - INIT_LIST_HEAD(&substream->group->substreams); list_add_tail(&substream->link_list, &substream->group->substreams); substream->group->count = 1; } |