serial: sirf: add uart receive's some error counter and mark

add overrun error's flag mark and parity's counter, we can show the
statistic from procfs node.

BTW, let the indentation of stick bits configuration look better.
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/sirfsoc_uart.c

@@ -606,14 +606,18 @@ static irqreturn_t sirfsoc_uart_isr(int irq, void *dev_id)
 			if (uart_handle_break(port))
 				goto recv_char;
 		}
-		if (intr_status & uint_st->sirfsoc_rx_oflow)
+		if (intr_status & uint_st->sirfsoc_rx_oflow) {
 			port->icount.overrun++;
+			flag = TTY_OVERRUN;
+		}
 		if (intr_status & uint_st->sirfsoc_frm_err) {
 			port->icount.frame++;
 			flag = TTY_FRAME;
 		}
-		if (intr_status & uint_st->sirfsoc_parity_err)
+		if (intr_status & uint_st->sirfsoc_parity_err) {
+			port->icount.parity++;
 			flag = TTY_PARITY;
+		}
 		wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_RESET);
 		wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0);
 		wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_START);
@@ -932,9 +936,10 @@ static void sirfsoc_uart_set_termios(struct uart_port *port,
 					config_reg |= SIRFUART_STICK_BIT_MARK;
 				else
 					config_reg |= SIRFUART_STICK_BIT_SPACE;
-			} else if (termios->c_cflag & PARODD) {
-				config_reg |= SIRFUART_STICK_BIT_ODD;
 			} else {
+				if (termios->c_cflag & PARODD)
+					config_reg |= SIRFUART_STICK_BIT_ODD;
+				else
 					config_reg |= SIRFUART_STICK_BIT_EVEN;
 			}
 		}