[IA64] Stop multiple pci_claim_resource() call for the same resource

This patch fixes the bug that pci_claim_resource() is called multiple
times for the same P2P bridge's resource structures if P2P bridges
require their own PCI I/O resources.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 14 insertions, 5 deletions

diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 30dbc98bf0b3..d27ecdcb6fca 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -454,14 +454,13 @@ static int __devinit is_valid_resource(struct pci_dev *dev, int idx)
         return 0;
 }
 
-static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
+static void __devinit
+pcibios_fixup_resources(struct pci_dev *dev, int start, int limit)
 {
         struct pci_bus_region region;
         int i;
-        int limit = (dev->hdr_type == PCI_HEADER_TYPE_NORMAL) ? \
-                PCI_BRIDGE_RESOURCES : PCI_NUM_RESOURCES;
 
-        for (i = 0; i < limit; i++) {
+        for (i = start; i < limit; i++) {
                 if (!dev->resource[i].flags)
                         continue;
                 region.start = dev->resource[i].start;
@@ -472,6 +471,16 @@ static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
         }
 }
 
+static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
+{
+        pcibios_fixup_resources(dev, 0, PCI_BRIDGE_RESOURCES);
+}
+
+static void __devinit pcibios_fixup_bridge_resources(struct pci_dev *dev)
+{
+        pcibios_fixup_resources(dev, PCI_BRIDGE_RESOURCES, PCI_NUM_RESOURCES);
+}
+
 /*
  *  Called after each bus is probed, but before its children are examined.
  */
@@ -482,7 +491,7 @@ pcibios_fixup_bus (struct pci_bus *b)
 
         if (b->self) {
                 pci_read_bridge_bases(b);
-                pcibios_fixup_device_resources(b->self);
+                pcibios_fixup_bridge_resources(b->self);
         }
         list_for_each_entry(dev, &b->devices, bus_list)
                 pcibios_fixup_device_resources(dev);