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Diffstat (limited to 'sound/usb/stream.c')
-rw-r--r--sound/usb/stream.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index 2f6d39c2ba7c..bf88933acc4f 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -67,9 +67,13 @@ static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
67static void snd_usb_audio_pcm_free(struct snd_pcm *pcm) 67static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
68{ 68{
69 struct snd_usb_stream *stream = pcm->private_data; 69 struct snd_usb_stream *stream = pcm->private_data;
70 struct snd_usb_audio *chip;
70 if (stream) { 71 if (stream) {
72 mutex_lock(&stream->chip->dev_lock);
73 chip = stream->chip;
71 stream->pcm = NULL; 74 stream->pcm = NULL;
72 snd_usb_audio_stream_free(stream); 75 snd_usb_audio_stream_free(stream);
76 mutex_unlock(&chip->dev_lock);
73 } 77 }
74} 78}
75 79