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-rw-r--r--sound/core/pcm.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 43932e8dce66..afccdc553ef9 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -698,6 +698,7 @@ int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count)
}
substream->group = &substream->self_group;
spin_lock_init(&substream->self_group.lock);
+ mutex_init(&substream->self_group.mutex);
INIT_LIST_HEAD(&substream->self_group.substreams);
list_add_tail(&substream->link_list, &substream->self_group.substreams);
atomic_set(&substream->mmap_count, 0);