1 files changed, 1 insertions, 0 deletions

diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index df57a0e30bf2..0d428d0896db 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -894,6 +894,7 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
         memset((void*)runtime->control, 0, size);
 
         init_waitqueue_head(&runtime->sleep);
+        init_waitqueue_head(&runtime->tsleep);
 
         runtime->status->state = SNDRV_PCM_STATE_OPEN;