This is a note to let you know that I've just added the patch titled
powerpc/hvsi: Increase handshake timeout from 200ms to 400ms.
to the 3.4-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:
powerpc-hvsi-increase-handshake-timeout-from-200ms-to-400ms.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d220980b701d838560a70de691b53be007e99e78 Mon Sep 17 00:00:00 2001
From: Eugene Surovegin <ebs@xxxxxxxxxxx>
Date: Mon, 26 Aug 2013 11:53:32 -0700
Subject: powerpc/hvsi: Increase handshake timeout from 200ms to 400ms.
From: Eugene Surovegin <ebs@xxxxxxxxxxx>
commit d220980b701d838560a70de691b53be007e99e78 upstream.
This solves a problem observed in kexec'ed kernel where 200ms timeout is
too short and bootconsole fails to initialize. Console did eventually
become workable but much later into the boot process.
Observed timeout was around 260ms, but I decided to make it a little bigger
for more reliability.
This has been tested on Power7 machine with Petitboot as a primary
bootloader and PowerNV firmware.
Signed-off-by: Eugene Surovegin <surovegin@xxxxxxxxxx>
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/hvc/hvsi_lib.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/tty/hvc/hvsi_lib.c
+++ b/drivers/tty/hvc/hvsi_lib.c
@@ -341,8 +341,8 @@ void hvsilib_establish(struct hvsi_priv
pr_devel("HVSI@%x: ... waiting handshake\n", pv->termno);
- /* Try for up to 200s */
- for (timeout = 0; timeout < 20; timeout++) {
+ /* Try for up to 400ms */
+ for (timeout = 0; timeout < 40; timeout++) {
if (pv->established)
goto established;
if (!hvsi_get_packet(pv))
Patches currently in stable-queue which might be from ebs@xxxxxxxxxxx are
queue-3.4/powerpc-hvsi-increase-handshake-timeout-from-200ms-to-400ms.patch
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