IWM_FLAG_MAC_ACTIVE
sc->sc_flags &= ~IWM_FLAG_MAC_ACTIVE;
int active = (sc->sc_flags & IWM_FLAG_MAC_ACTIVE);
sc->sc_flags |= IWM_FLAG_MAC_ACTIVE;
sc->sc_flags &= ~IWM_FLAG_MAC_ACTIVE;
if (sc->sc_flags & IWM_FLAG_MAC_ACTIVE) {
sc->sc_flags &= ~IWM_FLAG_MAC_ACTIVE;