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| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2019-08-13 13:45:32 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-08-15 17:07:43 +0300 |
| commit | 72b745e3ad65deac94ea4eb83262c52ba3ffdb5b (patch) | |
| tree | a5850d63c1e97e8fc8d4a6e1f29b8d6e181b112a /sound/soc/soc-core.c | |
| parent | 12f0bfadf69bb154052722e7e4e5cd1639044c76 (diff) | |
| download | linux-72b745e3ad65deac94ea4eb83262c52ba3ffdb5b.tar.xz | |
ASoC: core: Move pcm_mutex up to card level from snd_soc_pcm_runtime
The pcm_mutex is used to prevent concurrent execution of snd_pcm_ops
callbacks. This works fine most of the cases but it can not handle setups
when the same DAI is used by different rtd, for example:
pcm3168a have two DAIs: one for Playback and one for Capture.
If the codec is connected to a single CPU DAI we need to have two dai_link
to support both playback and capture.
In this case the snd_pcm_ops callbacks can be executed in parallel causing
unexpected races in DAI drivers.
By moving the pcm_mutex up to card level this can be solved
while - hopefully - not breaking other setups.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190813104532.16669-1-peter.ujfalusi@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/soc-core.c')
| -rw-r--r-- | sound/soc/soc-core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index abe2f47cee6e..b3f820fb53e6 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -1360,7 +1360,6 @@ static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd, rtd->dev->groups = soc_dev_attr_groups; dev_set_name(rtd->dev, "%s", name); dev_set_drvdata(rtd->dev, rtd); - mutex_init(&rtd->pcm_mutex); INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients); INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients); INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients); @@ -2383,6 +2382,7 @@ int snd_soc_register_card(struct snd_soc_card *card) card->instantiated = 0; mutex_init(&card->mutex); mutex_init(&card->dapm_mutex); + mutex_init(&card->pcm_mutex); spin_lock_init(&card->dpcm_lock); return snd_soc_bind_card(card); |