LSR_OE
} while ((lsr & LSR_OE) == 0 && count < 260);
if (lsr & LSR_OE)
if ((sc->lsr & LSR_OE) != 0 && (sc->ier & IER_ERLS) != 0)
sc->lsr |= LSR_OE;
sc->lsr &= ~LSR_OE;