UARTDR_OVERR
status = ch & (UARTDR_FRMERR | UARTDR_PARERR | UARTDR_OVERR);
else if (status & UARTDR_OVERR)
else if (status & UARTDR_OVERR)
uart_insert_char(port, status, UARTDR_OVERR, ch, flg);
port->read_status_mask = UARTDR_OVERR;
port->ignore_status_mask |= UARTDR_OVERR | UARTDR_PARERR |