sbmac_state_on
if (s->sbm_state == sbmac_state_on)
s->sbm_state = sbmac_state_on;
if (state == sbmac_state_on) {
if (sc->sbm_state != sbmac_state_on)
if (s->sbm_state == sbmac_state_on)
if (s->sbm_state == sbmac_state_on)
sbmac_set_channel_state(sc,sbmac_state_on);