3 files changed, 28 insertions, 1 deletions

diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c
index a5ef5f551373..b60b2abd480c 100644
--- a/arch/x86/pci/fixup.c
+++ b/arch/x86/pci/fixup.c
@@ -493,3 +493,20 @@ static void __devinit pci_siemens_interrupt_controller(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015,
                           pci_siemens_interrupt_controller);
+
+/*
+ * Regular PCI devices have 256 bytes, but AMD Family 10h Opteron ext config
+ * have 4096 bytes.  Even if the device is capable, that doesn't mean we can
+ * access it.  Maybe we don't have a way to generate extended config space
+ * accesses.   So check it
+ */
+static void fam10h_pci_cfg_space_size(struct pci_dev *dev)
+{
+        dev->cfg_size = pci_cfg_space_size_ext(dev, 0);
+}
+
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1200, fam10h_pci_cfg_space_size);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1201, fam10h_pci_cfg_space_size);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1202, fam10h_pci_cfg_space_size);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1203, fam10h_pci_cfg_space_size);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1204, fam10h_pci_cfg_space_size);
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index f991359f0c36..a8efdaef1870 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -842,11 +842,14 @@ static void set_pcie_port_type(struct pci_dev *pdev)
  * reading the dword at 0x100 which must either be 0 or a valid extended
  * capability header.
  */
-int pci_cfg_space_size(struct pci_dev *dev)
+int pci_cfg_space_size_ext(struct pci_dev *dev, unsigned check_exp_pcix)
 {
         int pos;
         u32 status;
 
+        if (!check_exp_pcix)
+                goto skip;
+
         pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
         if (!pos) {
                 pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
@@ -858,6 +861,7 @@ int pci_cfg_space_size(struct pci_dev *dev)
                         goto fail;
         }
 
+ skip:
         if (pci_read_config_dword(dev, 256, &status) != PCIBIOS_SUCCESSFUL)
                 goto fail;
         if (status == 0xffffffff)
@@ -869,6 +873,11 @@ int pci_cfg_space_size(struct pci_dev *dev)
         return PCI_CFG_SPACE_SIZE;
 }
 
+int pci_cfg_space_size(struct pci_dev *dev)
+{
+        return pci_cfg_space_size_ext(dev, 1);
+}
+
 static void pci_release_bus_bridge_dev(struct device *dev)
 {
         kfree(dev);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 43a4f9cae67d..2b8f74522f8f 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -666,6 +666,7 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
 
 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
                   void *userdata);
+int pci_cfg_space_size_ext(struct pci_dev *dev, unsigned check_exp_pcix);
 int pci_cfg_space_size(struct pci_dev *dev);
 unsigned char pci_bus_max_busnr(struct pci_bus *bus);