RT2661_RCR_PROMISC
if (!(sc->sc_rcr & RT2661_RCR_PROMISC))
(sc->sc_rcr & RT2661_RCR_PROMISC) ? "entering" : "leaving");
if (!(sc->sc_rcr & RT2661_RCR_PROMISC))
sc->sc_rcr |= RT2661_RCR_PROMISC;
sc->sc_rcr &= ~RT2661_RCR_PROMISC;