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ALSA: usb6fire: prevent driver panic state when stopping 

The patch below prevents the 6fire usb driver going into panic state
when stopping playing. On some systems the urb in handler
(usb6fire_pcm_in_urb_handler) is being called while urbs are being
killed off, this causes the driver to set panic state and can result in
the kernel warning 'URB %p submitted while active'.

Signed-off-by: Jurgen Kramer <gtmkramer@xs4all.nl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jurgen Kramer 2012-12-07 10:26:43 +01:00 committed by Takashi Iwai
parent 090015aeef
commit 9621055fbb
1 changed files with 3 additions and 0 deletions
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3
sound/usb/6fire/pcm.c
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@ -135,6 +135,9 @@ static void usb6fire_pcm_stream_stop(struct pcm_runtime *rt)
struct control_runtime *ctrl_rt = rt->chip->control; struct control_runtime *ctrl_rt = rt->chip->control;
if (rt->stream_state != STREAM_DISABLED) { if (rt->stream_state != STREAM_DISABLED) {
rt->stream_state = STREAM_STOPPING;
for (i = 0; i < PCM_N_URBS; i++) { for (i = 0; i < PCM_N_URBS; i++) {
usb_kill_urb(&rt->in_urbs[i].instance); usb_kill_urb(&rt->in_urbs[i].instance);
usb_kill_urb(&rt->out_urbs[i].instance); usb_kill_urb(&rt->out_urbs[i].instance);