[ALSA] soc - 0.13 ASoC DAPM bug fix for unnamed streams

This patch fixes a bug whereby an unnamed stream would cause a NULL
pointer ref in snd_soc_dapm_stream_event().

Signed-off-by: Seth Forshee <seth.forshee@gmail.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 5c2a34956a5d..d0162a4cb7fd 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -1239,6 +1239,9 @@ int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
 {
         struct snd_soc_dapm_widget *w;
 
+        if (stream == NULL)
+                return 0;
+
         mutex_lock(&codec->mutex);
         list_for_each_entry(w, &codec->dapm_widgets, list)
         {