DZ_OERR
if (unlikely(status & (DZ_OERR | DZ_FERR | DZ_PERR))) {
if (status & DZ_OERR)
uart_insert_char(uport, status, DZ_OERR, ch, flag);
dport->port.read_status_mask = DZ_OERR;
dport->port.ignore_status_mask |= DZ_OERR;