x86/pci: Intel ioh bus num reg accessing fix

[net-next-2.6.git] / arch / x86 / pci / intel_bus.c

diff --git a/arch/x86/pci/intel_bus.c b/arch/x86/pci/intel_bus.c
index b7a55dc55d13f65b9921400b5a53cbd4ee9213f7..f81a2fa8fe256f0b53e4a4abbb27d998af103d75 100644 (file)
--- a/arch/x86/pci/intel_bus.c
+++ b/arch/x86/pci/intel_bus.c
@@ -49,6 +49,10 @@ static void __devinit pci_root_bus_res(struct pci_dev *dev)
        u64 mmioh_base, mmioh_end;
        int bus_base, bus_end;
 
+       /* some sys doesn't get mmconf enabled */
+       if (dev->cfg_size < 0x120)
+               return;
+
        if (pci_root_num >= PCI_ROOT_NR) {
                printk(KERN_DEBUG "intel_bus.c: PCI_ROOT_NR is too small\n");
                return;