ET_FLAG_LINK
sc->sc_flags &= ~ET_FLAG_LINK;
(sc->sc_flags & (ET_FLAG_LINK | ET_FLAG_TXRX_ENABLED)) !=
(ET_FLAG_LINK | ET_FLAG_TXRX_ENABLED))
sc->sc_flags &= ~ET_FLAG_LINK;
sc->sc_flags |= ET_FLAG_LINK;
sc->sc_flags |= ET_FLAG_LINK;
if ((sc->sc_flags & ET_FLAG_LINK) == 0)