ALSA: 6fire: Fix unlocked snd_pcm_stop() call

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

Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/6fire/pcm.c

@@ -639,17 +639,25 @@ 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);