From: Li Zhang <zhlcindy@gmail.com>
Date: Tue, 13 Aug 2013 18:42:58 +0000 (+0000)
Subject: e1000e: Avoid kernel crash during shutdown
X-Git-Tag: v3.12-rc1~132^2~206^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e8c254c5feb92c5b9a6950bc7351e2b1b7b09b93;p=pandora-kernel.git

e1000e: Avoid kernel crash during shutdown

While doing shutdown on the PCI device, the corresponding callback
function e1000e_shutdown() is trying to clear those correctable
errors on the upstream P2P bridge. Unfortunately, we don't have
the upstream P2P bridge under some cases (e.g. PCI-passthrou for
KVM on Power). That leads to kernel crash eventually.

The patch adds one more check on that to avoid kernel crash.

Signed-off-by: Li Zhang <zhlcindy@gmail.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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