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 84b2030..4e64c58 100644
--- a/arch/x86/pci/k8-bus_64.c
+++ b/arch/x86/pci/k8-bus_64.c
@@ -69,7 +69,8 @@
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++) {