RX_TTY_OVERFLOWED
if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED))
if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) {
CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED);
SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED);
if (ISSET(zst->zst_rx_flags, RX_TTY_OVERFLOWED)) {
CLR(zst->zst_rx_flags, RX_TTY_OVERFLOWED);
if (!ISSET(zst->zst_rx_flags, RX_TTY_OVERFLOWED)) {
if (ISSET(zst->zst_rx_flags, RX_TTY_OVERFLOWED)) {
CLR(zst->zst_rx_flags, RX_TTY_OVERFLOWED);
if (ISSET(zst->zst_rx_flags, RX_TTY_OVERFLOWED)) {
CLR(zst->zst_rx_flags, RX_TTY_OVERFLOWED);
if (!ISSET(zst->zst_rx_flags, RX_TTY_OVERFLOWED)) {
SET(zst->zst_rx_flags, RX_TTY_OVERFLOWED);