serial: imx: remove the redundant code

In the imx_startup(), we will reset the uart port which will reset all
the FIFOs, including the URXD.

So the code to clear the RX FIFO is redundant. Just remove it.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 9 deletions

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 060ae9753923..d373fe83da52 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1161,15 +1161,6 @@ static int imx_startup(struct uart_port *port)
                 temp |= UCR2_IRTS;
         writel(temp, sport->port.membase + UCR2);
 
-        if (USE_IRDA(sport)) {
-                /* clear RX-FIFO */
-                int i = 64;
-                while ((--i > 0) &&
-                        (readl(sport->port.membase + URXD0) & URXD_CHARRDY)) {
-                        barrier();
-                }
-        }
-
         if (!is_imx1_uart(sport)) {
                 temp = readl(sport->port.membase + UCR3);
                 temp |= IMX21_UCR3_RXDMUXSEL | UCR3_ADNIMP;