1 files changed, 13 insertions, 3 deletions

diff --git a/arch/i386/pci/fixup.c b/arch/i386/pci/fixup.c
index b60d7e8689ed..c1949ff38d61 100644
--- a/arch/i386/pci/fixup.c
+++ b/arch/i386/pci/fixup.c
@@ -348,8 +348,8 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_MCH_PC1,	pcie_r
  * From information provided by "Jon Smirl" <jonsmirl@gmail.com>
  *
  * The standard boot ROM sequence for an x86 machine uses the BIOS
- * to select an initial video card for boot display. This boot video 
- * card will have it's BIOS copied to C0000 in system RAM. 
+ * to select an initial video card for boot display. This boot video
+ * card will have it's BIOS copied to C0000 in system RAM.
  * IORESOURCE_ROM_SHADOW is used to associate the boot video
  * card with this copy. On laptops this copy has to be used since
  * the main ROM may be compressed or combined with another image.
@@ -371,7 +371,17 @@ static void __devinit pci_fixup_video(struct pci_dev *pdev)
         bus = pdev->bus;
         while (bus) {
                 bridge = bus->self;
-                if (bridge) {
+
+                /*
+                 * From information provided by
+                 * "David Miller" <davem@davemloft.net>
+                 * The bridge control register is valid for PCI header
+                 * type BRIDGE, or CARDBUS. Host to PCI controllers use
+                 * PCI header type NORMAL.
+                 */
+                if (bridge
+                    &&((bridge->hdr_type == PCI_HEADER_TYPE_BRIDGE)
+                       ||(bridge->hdr_type == PCI_HEADER_TYPE_CARDBUS))) {
                         pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
                                                 &config);
                         if (!(config & PCI_BRIDGE_CTL_VGA))