From c35ae1796bd4865bad322645a7edb92d223dfb51 Mon Sep 17 00:00:00 2001
From: Gavin Shan <shangw@linux.vnet.ibm.com>
Date: Thu, 27 Jun 2013 13:46:42 +0800
Subject: [PATCH] powerpc/eeh: Don't collect PCI-CFG data on PHB

When the PHB is fenced or dead, it's pointless to collect the data
from PCI config space of subordinate PCI devices since it should
return 0xFF's. The patch also fixes overwritten buffer while getting
PCI config data.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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