IMXUART_RX_TTY_OVERFLOWED
if (ISSET(sc->sc_rx_flags, IMXUART_RX_TTY_OVERFLOWED)) {
CLR(sc->sc_rx_flags, IMXUART_RX_TTY_OVERFLOWED);
if (ISSET(sc->sc_rx_flags, IMXUART_RX_TTY_OVERFLOWED)) {
CLR(sc->sc_rx_flags, IMXUART_RX_TTY_OVERFLOWED);
SET(sc->sc_rx_flags, IMXUART_RX_TTY_OVERFLOWED);
if (!ISSET(sc->sc_rx_flags, IMXUART_RX_TTY_OVERFLOWED))
(IMXUART_RX_TTY_BLOCKED|IMXUART_RX_TTY_OVERFLOWED| \