+/*
+ * Temporarily stop input.
+ */
+void snd_usbmidi_input_stop(struct list_head* p)
+{
+ snd_usb_midi_t* umidi;
+ int i;
+
+ umidi = list_entry(p, snd_usb_midi_t, list);
+ for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
+ snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
+ if (ep->in)
+ usb_kill_urb(ep->in->urb);
+ }
+}
+
+static void snd_usbmidi_input_start_ep(snd_usb_midi_in_endpoint_t* ep)
+{
+ if (ep) {
+ struct urb* urb = ep->urb;
+ urb->dev = ep->umidi->chip->dev;
+ snd_usbmidi_submit_urb(urb, GFP_KERNEL);
+ }
+}
+
+/*
+ * Resume input after a call to snd_usbmidi_input_stop().
+ */
+void snd_usbmidi_input_start(struct list_head* p)
+{
+ snd_usb_midi_t* umidi;
+ int i;
+
+ umidi = list_entry(p, snd_usb_midi_t, list);
+ for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
+ snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
+}
+