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| author | Liam Girdwood <lrg@ti.com> | 2012-07-06 16:57:05 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-07-06 18:58:46 +0100 |
| commit | 01005a729a17ab419f61a366e22f3419e7a2c3fe (patch) | |
| tree | b20e2b99c10fa7cf8670974fb823ecf5aca4c040 /sound/soc | |
| parent | 32fee7afe763344ef53bbd4e737aa6168a9308aa (diff) | |
| download | linux-01005a729a17ab419f61a366e22f3419e7a2c3fe.tar.gz linux-01005a729a17ab419f61a366e22f3419e7a2c3fe.tar.bz2 linux-01005a729a17ab419f61a366e22f3419e7a2c3fe.zip | |
ASoC: dapm: Fix locking during codec shutdown
Codec shutdown performs a DAPM power sequence that might cause conflicts
and/or race conditions if another stream power event is running simultaneously.
Use card's dapm mutex to protect any potential race condition between them.
Signed-off-by: Misael Lopez Cruz <misael.lopez@ti.com>
Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/soc-dapm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 5be4f9a2edb8..114f2af5f304 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -3537,10 +3537,13 @@ EXPORT_SYMBOL_GPL(snd_soc_dapm_free); static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm) { + struct snd_soc_card *card = dapm->card; struct snd_soc_dapm_widget *w; LIST_HEAD(down_list); int powerdown = 0; + mutex_lock(&card->dapm_mutex); + list_for_each_entry(w, &dapm->card->widgets, list) { if (w->dapm != dapm) continue; @@ -3563,6 +3566,8 @@ static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm) snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY); } + + mutex_unlock(&card->dapm_mutex); } /* |