UPL_ENDPT_INTR
sc->sc_ed[UPL_ENDPT_INTR] = ed->bEndpointAddress;
sc->sc_ed[UPL_ENDPT_INTR] == 0) {
sc->sc_ep[UPL_ENDPT_INTR] != NULL)
err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ed[UPL_ENDPT_INTR],
0, &sc->sc_ep[UPL_ENDPT_INTR], sc,
if (sc->sc_ep[UPL_ENDPT_INTR] != NULL) {
err = usbd_close_pipe(sc->sc_ep[UPL_ENDPT_INTR]);
sc->sc_ep[UPL_ENDPT_INTR] = NULL;