* disconnect streams
  * called from snd_usb_audio_disconnect()
  */
-static void snd_usb_stream_disconnect(struct list_head *head, struct usb_driver *driver)
+static void snd_usb_stream_disconnect(struct list_head *head)
 {
        int idx;
        snd_usb_stream_t *as;
                snd_card_disconnect(card);
                /* release the pcm resources */
                list_for_each(p, &chip->pcm_list) {
-                       snd_usb_stream_disconnect(p, &usb_audio_driver);
+                       snd_usb_stream_disconnect(p);
                }
                /* release the midi resources */
                list_for_each(p, &chip->midi_list) {
-                       snd_usbmidi_disconnect(p, &usb_audio_driver);
+                       snd_usbmidi_disconnect(p);
                }
                usb_chip[chip->index] = NULL;
                up(®ister_mutex);
 
 int snd_usb_create_midi_interface(snd_usb_audio_t *chip, struct usb_interface *iface, const snd_usb_audio_quirk_t *quirk);
 void snd_usbmidi_input_stop(struct list_head* p);
 void snd_usbmidi_input_start(struct list_head* p);
-void snd_usbmidi_disconnect(struct list_head *p, struct usb_driver *driver);
+void snd_usbmidi_disconnect(struct list_head *p);
 
 /*
  * retrieve usb_interface descriptor from the host interface
 
 /*
  * Unlinks all URBs (must be done before the usb_device is deleted).
  */
-void snd_usbmidi_disconnect(struct list_head* p, struct usb_driver *driver)
+void snd_usbmidi_disconnect(struct list_head* p)
 {
        snd_usb_midi_t* umidi;
        int i;
 
                snd_card_disconnect((snd_card_t*)ptr);
                /* release the midi resources */
                list_for_each(p, &usX2Y->chip.midi_list) {
-                       snd_usbmidi_disconnect(p, &snd_usX2Y_usb_driver);
+                       snd_usbmidi_disconnect(p);
                }
                if (usX2Y->us428ctls_sharedmem) 
                        wake_up(&usX2Y->us428ctls_wait_queue_head);