[PATCH 26/76] serial: also set the uartclk value in resume after goes to highspeed

From: Greg Kroah-Hartman
Date: Wed Mar 16 2011 - 17:15:02 EST

From: Yin Kangkai <kangkai.yin@xxxxxxxxxxxxxxx>

For any reason if the NS16550A was not work in high speed mode (e.g. we hold
NS16550A from going to high speed mode in autoconfig_16550a()), now we are
resume from suspend, we should also set the uartclk to the correct
value. Otherwise it is still the old 1843200 and that will bring issues.

CC: Greg Kroah-Hartman <greg@xxxxxxxxx>
CC: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
CC: linux-kernel@xxxxxxxxxxxxxxx
CC: stable@xxxxxxxxxx
Signed-off-by: Yin Kangkai <kangkai.yin@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
drivers/tty/serial/8250.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index 3975df6..c10a6a9 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -3036,6 +3036,7 @@ void serial8250_resume_port(int line)
serial_outp(up, 0x04, tmp);

serial_outp(up, UART_LCR, 0);
+ up->port.uartclk = 921600*16;
uart_resume_port(&serial8250_reg, &up->port);

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