The trigger callback is already spinlocked, so we need no more lock here (even for the linked substreams). Let's drop it.
Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/usb/line6/pcm.c | 23 ++++++----------------- sound/usb/line6/pcm.h | 5 ----- 2 files changed, 6 insertions(+), 22 deletions(-)
diff --git a/sound/usb/line6/pcm.c b/sound/usb/line6/pcm.c index 9a2a15f4c4e4..adbcac46b785 100644 --- a/sound/usb/line6/pcm.c +++ b/sound/usb/line6/pcm.c @@ -226,9 +226,8 @@ int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); struct snd_pcm_substream *s; - int err; + int err = 0;
- spin_lock(&line6pcm->lock_trigger); clear_bit(LINE6_INDEX_PREPARED, &line6pcm->flags);
snd_pcm_group_for_each_entry(s, substream) { @@ -237,32 +236,23 @@ int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd) switch (s->stream) { case SNDRV_PCM_STREAM_PLAYBACK: err = snd_line6_playback_trigger(line6pcm, cmd); - - if (err < 0) { - spin_unlock(&line6pcm->lock_trigger); - return err; - } - break;
case SNDRV_PCM_STREAM_CAPTURE: err = snd_line6_capture_trigger(line6pcm, cmd); - - if (err < 0) { - spin_unlock(&line6pcm->lock_trigger); - return err; - } - break;
default: dev_err(line6pcm->line6->ifcdev, "Unknown stream direction %d\n", s->stream); + err = -EINVAL; + break; } + if (err < 0) + break; }
- spin_unlock(&line6pcm->lock_trigger); - return 0; + return err; }
/* control info callback */ @@ -427,7 +417,6 @@ int line6_init_pcm(struct usb_line6 *line6,
spin_lock_init(&line6pcm->lock_audio_out); spin_lock_init(&line6pcm->lock_audio_in); - spin_lock_init(&line6pcm->lock_trigger); line6pcm->impulse_period = LINE6_IMPULSE_DEFAULT_PERIOD;
line6->line6pcm = line6pcm; diff --git a/sound/usb/line6/pcm.h b/sound/usb/line6/pcm.h index c742b33666eb..a84753ee0fa2 100644 --- a/sound/usb/line6/pcm.h +++ b/sound/usb/line6/pcm.h @@ -308,11 +308,6 @@ struct snd_line6_pcm { spinlock_t lock_audio_in;
/** - Spin lock to protect trigger. - */ - spinlock_t lock_trigger; - - /** PCM playback volume (left and right). */ int volume_playback[2];