From: Liam Girdwood Date: Fri, 6 Jul 2012 15:57:05 +0000 (+0100) Subject: ASoC: dapm: Fix locking during codec shutdown X-Git-Tag: upstream/snapshot3+hdmi~6461^2~116^2^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=01005a729a17ab419f61a366e22f3419e7a2c3fe;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git 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 Signed-off-by: Liam Girdwood Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 5be4f9a..114f2af 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); } /*