taglinefilesource code
UART_LSR_OE390drivers/char/serial.celse if (*status & UART_LSR_OE) 
UART_LSR_OE1158drivers/char/serial.cinfo->read_status_mask = UART_LSR_OE;
UART_LSR_OE1174drivers/char/serial.cinfo->ignore_status_mask |= UART_LSR_OE;