[ALSA] Fix Oops of PCM OSS emulation

Modules: PCM Midlevel,ALSA<-OSS emulation

Fix Oops of PCM OSS emulation occuring when multiple playback is used.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 964e4c47a7f..0860c5a8450 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -2007,14 +2007,16 @@ static void pcm_release_private(struct snd_pcm_substream *substream)
 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
 {
         snd_pcm_drop(substream);
-        if (substream->pcm_release)
-                substream->pcm_release(substream);
         if (substream->hw_opened) {
                 if (substream->ops->hw_free != NULL)
                         substream->ops->hw_free(substream);
                 substream->ops->close(substream);
                 substream->hw_opened = 0;
         }
+        if (substream->pcm_release) {
+                substream->pcm_release(substream);
+                substream->pcm_release = NULL;
+        }
         snd_pcm_detach_substream(substream);
 }