This is a note to let you know that I've just added the patch titled
igb: Fix lack of flush after register write and before delay
to the 2.6.32-longterm tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/longterm/longterm-queue-2.6.32.git;a=summary
The filename of the patch is:
igb-fix-lack-of-flush-after-register-write-and-before-delay.patch
and it can be found in the queue-2.6.32 subdirectory.
If you, or anyone else, feels it should not be added to the 2.6.32 longterm
tree,
please let <sta...@kernel.org> know about it.
>From 064b43304ed8ede8e13ff7b4338d09fd37bcffb1 Mon Sep 17 00:00:00 2001
From: Carolyn Wyborny <carolyn.wybo...@intel.com>
Date: Sat, 25 Jun 2011 13:18:12 +0000
Subject: igb: Fix lack of flush after register write and before delay
From: Carolyn Wyborny <carolyn.wybo...@intel.com>
commit 064b43304ed8ede8e13ff7b4338d09fd37bcffb1 upstream.
Register writes followed by a delay are required to have a flush
before the delay in order to commit the values to the register. Without
the flush, the code following the delay may not function correctly.
Reported-by: Tong Ho <tong...@ericsson.com>
Reported-by: Guenter Roeck <guenter.ro...@ericsson.com>
Signed-off-by: Carolyn Wyborny <carolyn.wybo...@intel.com>
Tested-by: Aaron Brown <aaron.f.br...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>
---
drivers/net/igb/e1000_82575.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/net/igb/e1000_82575.c
+++ b/drivers/net/igb/e1000_82575.c
@@ -941,6 +941,7 @@ static s32 igb_setup_copper_link_82575(s
ctrl |= E1000_CTRL_SLU;
ctrl &= ~(E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
wr32(E1000_CTRL, ctrl);
+ wrfl();
ret_val = igb_setup_serdes_link_82575(hw);
if (ret_val)
Patches currently in longterm-queue-2.6.32 which might be from
carolyn.wybo...@intel.com are
/home/gregkh/linux/longterm/longterm-queue-2.6.32/queue-2.6.32/igb-fix-lack-of-flush-after-register-write-and-before-delay.patch
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