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| author | Takashi Iwai <tiwai@suse.de> | 2014-02-19 14:30:29 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-02-02 14:21:21 +0100 |
| commit | 23c18d4bfd73ee24070849faf98b3ab01263a3c4 (patch) | |
| tree | 944e0e24bd847fdbbddd8baf5ab0976c0fdcfa81 /sound/core/pcm.c | |
| parent | 92b7952da8279189aad352efbf9f2e7001de9524 (diff) | |
| download | linux-23c18d4bfd73ee24070849faf98b3ab01263a3c4.tar.gz linux-23c18d4bfd73ee24070849faf98b3ab01263a3c4.tar.bz2 linux-23c18d4bfd73ee24070849faf98b3ab01263a3c4.zip | |
ALSA: control: Provide a helper to look for the preferred subdevice
Instead of open-coding the search over the control file loop, provide
a helper function for the preferred subdevice assigned to the current
process.
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm.c')
| -rw-r--r-- | sound/core/pcm.c | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c index dba5180e5b80..1b7c473720fa 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -161,7 +161,7 @@ static int snd_pcm_control_ioctl(struct snd_card *card, if (get_user(val, (int __user *)arg)) return -EFAULT; - control->prefer_pcm_subdevice = val; + control->preferred_subdevice[SND_CTL_SUBDEV_PCM] = val; return 0; } } @@ -901,9 +901,8 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct snd_pcm_str * pstr; struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; - struct snd_ctl_file *kctl; struct snd_card *card; - int prefer_subdevice = -1; + int prefer_subdevice; size_t size; if (snd_BUG_ON(!pcm || !rsubstream)) @@ -914,15 +913,7 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, return -ENODEV; card = pcm->card; - read_lock(&card->ctl_files_rwlock); - list_for_each_entry(kctl, &card->ctl_files, list) { - if (kctl->pid == task_pid(current)) { - prefer_subdevice = kctl->prefer_pcm_subdevice; - if (prefer_subdevice != -1) - break; - } - } - read_unlock(&card->ctl_files_rwlock); + prefer_subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_PCM); switch (stream) { case SNDRV_PCM_STREAM_PLAYBACK: |