From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
snd_pcm_running() is using "substream" and "substream->runtime"
pointer. Let's check it before use it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
include/sound/pcm.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 24febf9..a8e49f5 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -664,6 +664,9 @@ void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
*/
static inline int snd_pcm_running(struct snd_pcm_substream *substream)
{
+ if (!substream || !substream->runtime)
+ return 0;
+
return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
(substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
--
1.9.1
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