serial: imx: Fix issue in software flow control
authorJiada Wang <jiada_wang@mentor.com>
Tue, 9 Dec 2014 09:11:35 +0000 (18:11 +0900)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 9 Jan 2015 22:23:59 +0000 (14:23 -0800)
After send out x_char in UART driver, x_char needs to be cleared
by UART driver itself, otherwise data in TXFIFO can no longer be
sent out.
Also tx counter needs to be increased to keep track of correct
number of transmitted data.

Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/imx.c

index 79f485b..5a7da01 100644 (file)
@@ -471,6 +471,8 @@ static inline void imx_transmit_buffer(struct imx_port *sport)
        if (sport->port.x_char) {
                /* Send next char */
                writel(sport->port.x_char, sport->port.membase + URTX0);
+               sport->port.icount.tx++;
+               sport->port.x_char = 0;
                return;
        }