sbmac_state_off
sc->sbm_state = sbmac_state_off;
if (sc->sbm_state == sbmac_state_off)
sc->sbm_state = sbmac_state_off;
if (sc->sbm_state != sbmac_state_off)
if (sc->sbm_state != sbmac_state_off)
sbmac_set_channel_state(sc, sbmac_state_off);
oldstate = sbmac_set_channel_state(sc, sbmac_state_off);