taglinefilesource code
UART_LSR_OE398drivers/char/serial.celse if (*status & UART_LSR_OE) 
UART_LSR_OE1221drivers/char/serial.cinfo->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
UART_LSR_OE1240drivers/char/serial.cinfo->ignore_status_mask |= UART_LSR_OE;
UART_LSR_OE1241drivers/char/serial.cinfo->read_status_mask |= UART_LSR_OE;