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Diffstat (limited to 'sound')
-rw-r--r--sound/core/pcm_lib.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index d80041ea4e01..2236b5e0c1f2 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -1782,11 +1782,14 @@ void snd_pcm_period_elapsed(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime;
unsigned long flags;
- if (PCM_RUNTIME_CHECK(substream))
+ if (snd_BUG_ON(!substream))
return;
- runtime = substream->runtime;
snd_pcm_stream_lock_irqsave(substream, flags);
+ if (PCM_RUNTIME_CHECK(substream))
+ goto _unlock;
+ runtime = substream->runtime;
+
if (!snd_pcm_running(substream) ||
snd_pcm_update_hw_ptr0(substream, 1) < 0)
goto _end;
@@ -1797,6 +1800,7 @@ void snd_pcm_period_elapsed(struct snd_pcm_substream *substream)
#endif
_end:
kill_fasync(&runtime->fasync, SIGIO, POLL_IN);
+ _unlock:
snd_pcm_stream_unlock_irqrestore(substream, flags);
}
EXPORT_SYMBOL(snd_pcm_period_elapsed);