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ALSA: aloop: Support return of error code for timer start and stop

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This is required for additional timer implementations which could detect
errors and want to throw them.

Signed-off-by: Timo Wischer <twischer@de.adit-jv.com>
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Link: https://lore.kernel.org/r/20191120174955.6410-3-andrew_gabbasov@mentor.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Timo Wischer 2019-11-20 11:49:50 -06:00 committed by Takashi Iwai
parent 97dda3da20
commit 09419f1ace
1 changed files with 19 additions and 11 deletions
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30
sound/drivers/aloop.c
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@ -155,7 +155,7 @@ static inline unsigned int get_rate_shift(struct loopback_pcm *dpcm)
}
/* call in cable->lock */
static void loopback_timer_start(struct loopback_pcm *dpcm)
static int loopback_timer_start(struct loopback_pcm *dpcm)
{
unsigned long tick;
unsigned int rate_shift = get_rate_shift(dpcm);
@ -171,18 +171,24 @@ static void loopback_timer_start(struct loopback_pcm *dpcm)
tick = dpcm->period_size_frac - dpcm->irq_pos;
tick = (tick + dpcm->pcm_bps - 1) / dpcm->pcm_bps;
mod_timer(&dpcm->timer, jiffies + tick);
return 0;
}
/* call in cable->lock */
static inline void loopback_timer_stop(struct loopback_pcm *dpcm)
static inline int loopback_timer_stop(struct loopback_pcm *dpcm)
{
del_timer(&dpcm->timer);
dpcm->timer.expires = 0;
return 0;
}
static inline void loopback_timer_stop_sync(struct loopback_pcm *dpcm)
static inline int loopback_timer_stop_sync(struct loopback_pcm *dpcm)
{
del_timer_sync(&dpcm->timer);
return 0;
}
#define CABLE_VALID_PLAYBACK (1 << SNDRV_PCM_STREAM_PLAYBACK)
@ -251,7 +257,7 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
struct snd_pcm_runtime *runtime = substream->runtime;
struct loopback_pcm *dpcm = runtime->private_data;
struct loopback_cable *cable = dpcm->cable;
int err, stream = 1 << substream->stream;
int err = 0, stream = 1 << substream->stream;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
@ -264,7 +270,7 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
spin_lock(&cable->lock);
cable->running |= stream;
cable->pause &= ~stream;
loopback_timer_start(dpcm);
err = loopback_timer_start(dpcm);
spin_unlock(&cable->lock);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
loopback_active_notify(dpcm);
@ -273,7 +279,7 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
spin_lock(&cable->lock);
cable->running &= ~stream;
cable->pause &= ~stream;
loopback_timer_stop(dpcm);
err = loopback_timer_stop(dpcm);
spin_unlock(&cable->lock);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
loopback_active_notify(dpcm);
@ -282,7 +288,7 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
case SNDRV_PCM_TRIGGER_SUSPEND:
spin_lock(&cable->lock);
cable->pause |= stream;
loopback_timer_stop(dpcm);
err = loopback_timer_stop(dpcm);
spin_unlock(&cable->lock);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
loopback_active_notify(dpcm);
@ -292,7 +298,7 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
spin_lock(&cable->lock);
dpcm->last_jiffies = jiffies;
cable->pause &= ~stream;
loopback_timer_start(dpcm);
err = loopback_timer_start(dpcm);
spin_unlock(&cable->lock);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
loopback_active_notify(dpcm);
@ -300,7 +306,7 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
default:
return -EINVAL;
}
return 0;
return err;
}
static void params_change(struct snd_pcm_substream *substream)
@ -321,9 +327,11 @@ static int loopback_prepare(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime;
struct loopback_pcm *dpcm = runtime->private_data;
struct loopback_cable *cable = dpcm->cable;
int bps, salign;
int err, bps, salign;
loopback_timer_stop_sync(dpcm);
err = loopback_timer_stop_sync(dpcm);
if (err < 0)
return err;
salign = (snd_pcm_format_physical_width(runtime->format) *
runtime->channels) / 8;