[PATCH 1/1] ASoC: soc-compress: lock pcm_mutex to resolve lockdep error

[이경택]

snd_soc_runtime_activate() and snd_soc_runtime_deactivate()
require locked pcm_mutex.

Signed-off-by: Gyeongtaek Lee <gt82.lee at samsung.com>
---
 sound/soc/soc-compress.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index 392a1c5b15d3..42d416ac7e9b 100644
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -207,7 +207,9 @@ static int soc_compr_open_fe(struct snd_compr_stream
*cstream)
 	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
 
+	mutex_lock_nested(&fe->pcm_mutex, fe->pcm_subclass);
 	snd_soc_runtime_activate(fe, stream);
+	mutex_unlock(&fe->pcm_mutex);
 
 	mutex_unlock(&fe->card->mutex);
 
@@ -285,7 +287,9 @@ static int soc_compr_free_fe(struct snd_compr_stream
*cstream)
 	else
 		stream = SNDRV_PCM_STREAM_CAPTURE;
 
+	mutex_lock_nested(&fe->pcm_mutex, fe->pcm_subclass);
 	snd_soc_runtime_deactivate(fe, stream);
+	mutex_unlock(&fe->pcm_mutex);
 
 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 
-- 
2.21.0