From 07f9b61c3915e8eb156cb4461b3946736356ad02 Mon Sep 17 00:00:00 2001
From: "ethan.zhao" <ethan.zhao@oracle.com>
Date: Fri, 26 Jul 2013 11:21:24 -0600
Subject: [PATCH] x86/PCI: MMCONFIG: Check earlier for MMCONFIG region at
 address zero

We can check for addr being zero earlier and thus avoid the mutex_unlock()
cleanup path.

[bhelgaas: drop warning printk]
Signed-off-by: ethan.zhao <ethan.zhao@oracle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
---
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