ALSA: pcm - Fix unbalanced pm_qos_request

The pm_qos_request isn't freed properly when OSS PCM emulation is used
because it skips snd_pcm_hw_free() call but directly releases the
stream.  This resulted in Oops later.

Tested-by: Simon Kirby <sim@hostway.ca>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 134fc6c..d4eb2ef 100644 (file)
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1992,6 +1992,8 @@ void snd_pcm_release_substream(struct snd_pcm_substream *substream)
                substream->ops->close(substream);
                substream->hw_opened = 0;
        }
+       if (pm_qos_request_active(&substream->latency_pm_qos_req))
+               pm_qos_remove_request(&substream->latency_pm_qos_req);
        if (substream->pcm_release) {
                substream->pcm_release(substream);
                substream->pcm_release = NULL;