FXPF_FC
sc->sc_flags |= FXPF_FC|FXPF_EXT_TXCB;
if (sc->sc_flags & FXPF_FC) {
if (sc->sc_flags & FXPF_FC) {
if (!(sc->sc_flags & FXPF_FC)) {
if (sc->sc_flags & FXPF_FC) {
if (sc->sc_flags & FXPF_FC)
sc->sc_flags |= FXPF_FC|FXPF_EXT_TXCB;
sc->sc_flags |= FXPF_FC|FXPF_EXT_TXCB;
sc->sc_flags |= FXPF_FC|FXPF_EXT_TXCB;