GJF_DEVICE_SWITCH
sc->sc_flags &= ~GJF_DEVICE_SWITCH;
if ((sc->sc_flags & GJF_DEVICE_SWITCH) ||
if (sc->sc_flags & GJF_DEVICE_SWITCH) {
if ((sc->sc_flags & GJF_DEVICE_SWITCH) &&
sc->sc_flags |= GJF_DEVICE_SWITCH;
while (sc->sc_flags & GJF_DEVICE_SWITCH) {