u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
                u->urb->interval = 1 << subs->datainterval;
                u->urb->context = u;
-               u->urb->complete = snd_usb_complete_callback(snd_complete_urb);
+               u->urb->complete = snd_complete_urb;
        }
 
        if (subs->syncpipe) {
                        u->urb->number_of_packets = 1;
                        u->urb->interval = 1 << subs->syncinterval;
                        u->urb->context = u;
-                       u->urb->complete = snd_usb_complete_callback(snd_complete_sync_urb);
+                       u->urb->complete = snd_complete_sync_urb;
                }
        }
        return 0;
 
                return -ENOMEM;
        }
        if (ep_info->in_interval)
-               usb_fill_int_urb(ep->urb, umidi->chip->dev, pipe, buffer, length,
-                                snd_usb_complete_callback(snd_usbmidi_in_urb_complete),
-                                ep, ep_info->in_interval);
+               usb_fill_int_urb(ep->urb, umidi->chip->dev, pipe, buffer,
+                                length, snd_usbmidi_in_urb_complete, ep,
+                                ep_info->in_interval);
        else
-               usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer, length,
-                                 snd_usb_complete_callback(snd_usbmidi_in_urb_complete),
-                                 ep);
+               usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer,
+                                 length, snd_usbmidi_in_urb_complete, ep);
        ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 
        rep->in = ep;
                return -ENOMEM;
        }
        usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer,
-                         ep->max_transfer,
-                         snd_usb_complete_callback(snd_usbmidi_out_urb_complete), ep);
+                         ep->max_transfer, snd_usbmidi_out_urb_complete, ep);
        ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 
        spin_lock_init(&ep->buffer_lock);