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-rw-r--r--sound/core/pcm.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 8e980aa678d0..074363b63cc4 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -149,7 +149,9 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
err = -ENXIO;
goto _error;
}
+ mutex_lock(&pcm->open_mutex);
err = snd_pcm_info_user(substream, info);
+ mutex_unlock(&pcm->open_mutex);
_error:
mutex_unlock(&register_mutex);
return err;