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imx: serial: be sure to stop xmit upon shutdown 

needed to avoid continued transmission by hardware
while software already shuts down, which might
cause dangling characters to show up in hardware
queues when restarting the device.

Signed-off-by: Fabian Godehardt <fg@emlix.com>
Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Fabian Godehardt 2009-06-11 14:38:38 +01:00 committed by Linus Torvalds
parent 977757311e
commit 2e1463922a
1 changed files with 4 additions and 0 deletions
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4
drivers/serial/imx.c
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@ -634,6 +634,10 @@ static void imx_shutdown(struct uart_port *port)
struct imx_port *sport = (struct imx_port *)port;
unsigned long temp;
temp = readl(sport->port.membase + UCR2);
temp &= ~(UCR2_TXEN);
writel(temp, sport->port.membase + UCR2);
/*
* Stop our timer.
*/