This is a note to let you know that I've just added the patch titled
serial: also set the uartclk value in resume after goes to highspeed
to the 2.6.38-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
serial-also-set-the-uartclk-value-in-resume-after-goes-to-highspeed.patch
and it can be found in the queue-2.6.38 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 95926d2db6256e08d06b753752a0d903a0580acc Mon Sep 17 00:00:00 2001
From: Yin Kangkai <[email protected]>
Date: Wed, 9 Feb 2011 11:34:20 +0800
Subject: serial: also set the uartclk value in resume after goes to highspeed
From: Yin Kangkai <[email protected]>
commit 95926d2db6256e08d06b753752a0d903a0580acc upstream.
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 <[email protected]>
CC: David Woodhouse <[email protected]>
CC: [email protected]
Signed-off-by: Yin Kangkai <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/tty/serial/8250.c | 1 +
1 file changed, 1 insertion(+)
--- 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);
}
Patches currently in stable-queue which might be from
[email protected] are
queue-2.6.38/serial-change-the-divisor-latch-only-when-prescalar-actually-changed.patch
queue-2.6.38/serial-also-set-the-uartclk-value-in-resume-after-goes-to-highspeed.patch
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