ALSA: usb-audio: Kill stray URB at exiting

[pandora-kernel.git] / sound / usb / mixer.c

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index b6bef94..a489f2f 100644 (file)
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -1985,6 +1985,9 @@ static int parse_audio_unit(struct mixer_build *state, int unitid)
 
 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
 {
+       /* kill pending URBs */
+       snd_usb_mixer_disconnect(&mixer->list);
+
        kfree(mixer->id_elems);
        if (mixer->urb) {
                kfree(mixer->urb->transfer_buffer);
@@ -2331,6 +2334,11 @@ void snd_usb_mixer_disconnect(struct list_head *p)
        struct usb_mixer_interface *mixer;
 
        mixer = list_entry(p, struct usb_mixer_interface, list);
-       usb_kill_urb(mixer->urb);
-       usb_kill_urb(mixer->rc_urb);
+       if (mixer->disconnected)
+               return;
+       if (mixer->urb)
+               usb_kill_urb(mixer->urb);
+       if (mixer->rc_urb)
+               usb_kill_urb(mixer->rc_urb);
+       mixer->disconnected = true;
 }