From: Yinghai Lu <yhlu.kernel.send@gmail.com>
Date: Fri, 11 Apr 2008 22:14:52 +0000 (-0700)
Subject: x86_64: don't need set default res if only have one root bus
X-Git-Tag: v2.6.26-rc1~369^2~3
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=4cf19463745fad81ef2eed3e4e0038da5fd153f8;p=~emulex%2Finfiniband.git

x86_64: don't need set default res if only have one root bus

if there's only one root bus there's no need to split resources.

This patch fixes the issue described at:

  http://lkml.org/lkml/2008/4/10/304

Reported-and-bisected-by: Rafael J. Wysocki <rjw@sisk.pl>
Tested-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/arch/x86/pci/k8-bus_64.c b/arch/x86/pci/k8-bus_64.c
index 84b2030fc2f..4e64c58e17a 100644
--- a/arch/x86/pci/k8-bus_64.c
+++ b/arch/x86/pci/k8-bus_64.c
@@ -69,7 +69,8 @@ void set_pci_bus_resources_arch_default(struct pci_bus *b)
 	int j;
 	struct pci_root_info *info;
 
-	if (!pci_root_num)
+	/* if only one root bus, don't need to anything */
+	if (pci_root_num < 2)
 		return;
 
 	for (i = 0; i < pci_root_num; i++) {