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Subject[PATCH] x86_64: don't need set default res if only have one root bus
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only one root bus, don't need to split that root resources.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

diff --git a/arch/x86/pci/k8-bus_64.c b/arch/x86/pci/k8-bus_64.c
index 7ed7f51..c433982 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++) {

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