BTSCO_WAIT_CONNECT
KASSERT(sc->sc_state == BTSCO_WAIT_CONNECT);
case BTSCO_WAIT_CONNECT: /* connect failed */
|| sc->sc_state != BTSCO_WAIT_CONNECT
sc->sc_state = BTSCO_WAIT_CONNECT;
while (err == 0 && sc->sc_state == BTSCO_WAIT_CONNECT)
case BTSCO_WAIT_CONNECT: /* error */