CFUMASS_T_MAX
struct usb_xfer *sc_xfer[CFUMASS_T_MAX];
static struct usb_config cfumass_config[CFUMASS_T_MAX] = {
CFUMASS_T_MAX, sc, &sc->sc_mtx);
usbd_transfer_unsetup(sc->sc_xfer, CFUMASS_T_MAX);
usbd_transfer_unsetup(sc->sc_xfer, CFUMASS_T_MAX);