[ 033/103] ALSA: 6fire: Fix unlocked snd_pcm_stop() call

From: Greg Kroah-Hartman
Date: Tue Jul 23 2013 - 18:50:39 EST


3.10-stable review patch. If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <tiwai@xxxxxxx>

commit 5b9ab3f7324a1b94a5a5a76d44cf92dfeb3b5e80 upstream.

snd_pcm_stop() must be called in the PCM substream lock context.

Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
sound/usb/6fire/pcm.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

--- a/sound/usb/6fire/pcm.c
+++ b/sound/usb/6fire/pcm.c
@@ -641,17 +641,25 @@ int usb6fire_pcm_init(struct sfire_chip
void usb6fire_pcm_abort(struct sfire_chip *chip)
{
struct pcm_runtime *rt = chip->pcm;
+ unsigned long flags;
int i;

if (rt) {
rt->panic = true;

- if (rt->playback.instance)
+ if (rt->playback.instance) {
+ snd_pcm_stream_lock_irqsave(rt->playback.instance, flags);
snd_pcm_stop(rt->playback.instance,
SNDRV_PCM_STATE_XRUN);
- if (rt->capture.instance)
+ snd_pcm_stream_unlock_irqrestore(rt->playback.instance, flags);
+ }
+
+ if (rt->capture.instance) {
+ snd_pcm_stream_lock_irqsave(rt->capture.instance, flags);
snd_pcm_stop(rt->capture.instance,
SNDRV_PCM_STATE_XRUN);
+ snd_pcm_stream_unlock_irqrestore(rt->capture.instance, flags);
+ }

for (i = 0; i < PCM_N_URBS; i++) {
usb_poison_urb(&rt->in_urbs[i].instance);


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