usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, USBDEV(sc->sc_dev));
USB_DETACH(ural){	USB_DETACH_START(ural, sc);	struct ifnet *ifp = &sc->sc_ic.ic_if;	usb_rem_task(sc->sc_udev, &sc->sc_task);	timeout_del(&sc->scan_ch);#if NBPFILTER > 0	bpfdetach(ifp);#endif	ieee80211_ifdetach(ifp);	if_detach(ifp);	return 0;}