From: Don Skidmore <donald.c.skidmore@intel.com>
Date: Fri, 11 Jun 2010 13:20:29 +0000 (+0000)
Subject: ixgbe: fix for race with 8259(8|9) during shutdown
X-Git-Tag: v2.6.35-rc4~54^2~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d08935c274b7e552e47633cf0cbd74b6e953d228;p=pandora-kernel.git

ixgbe: fix for race with 8259(8|9) during shutdown

There is a small window where the watchdog could be running as the
interface is brought down on a NIC with two ports wired back to back.
If ixgbe_update_status is then called can lead to a panic.  This patch
allows the update to bail if we are in that condition.

This issue was orignally reported and fix proposed by Akihiko Saitou.

CC: Akihiko Saitou <asaitou@users.sourceforge.net>
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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