From 09419f1ace213284823ad835d28b239c33daeb71 Mon Sep 17 00:00:00 2001 From: Timo Wischer Date: Wed, 20 Nov 2019 11:49:50 -0600 Subject: ALSA: aloop: Support return of error code for timer start and stop This is required for additional timer implementations which could detect errors and want to throw them. Signed-off-by: Timo Wischer Signed-off-by: Andrew Gabbasov Link: https://lore.kernel.org/r/20191120174955.6410-3-andrew_gabbasov@mentor.com Signed-off-by: Takashi Iwai --- sound/drivers/aloop.c | 30 +++++++++++++++++++----------- 1 file changed, 19 insertions(+), 11 deletions(-) (limited to 'sound') diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c index 573b06cf7cf5..7919006f70a5 100644 --- a/sound/drivers/aloop.c +++ b/sound/drivers/aloop.c @@ -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; -- cgit