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Subject[PATCH 23/75] ALSA: 6fire: Fix unlocked snd_pcm_stop() call
Date
3.8.13.6 -stable review patch.  If anyone has any objections, please let me know.

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

From: Takashi Iwai <tiwai@suse.de>

commit 5b9ab3f7324a1b94a5a5a76d44cf92dfeb3b5e80 upstream.

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

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
sound/usb/6fire/pcm.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/sound/usb/6fire/pcm.c b/sound/usb/6fire/pcm.c
index 40dd50a..8221ff2 100644
--- a/sound/usb/6fire/pcm.c
+++ b/sound/usb/6fire/pcm.c
@@ -641,17 +641,25 @@ int usb6fire_pcm_init(struct sfire_chip *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);
--
1.8.1.2


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