x86/PCI: Factor out pcibios_allocate_bridge_resources()

Thus pcibios_allocate_bus_resources() could more simple and clean.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

arch/x86/pci/i386.c

@@ -193,23 +193,16 @@ EXPORT_SYMBOL(pcibios_align_resource);
  *	    as well.
  */
 
-static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
+static void __init pcibios_allocate_bridge_resources(struct pci_dev *dev)
 {
-	struct pci_bus *bus;
-	struct pci_dev *dev;
 	int idx;
 	struct resource *r;
 
-	/* Depth-First Search on bus tree */
-	list_for_each_entry(bus, bus_list, node) {
-		if ((dev = bus->self)) {
-			for (idx = PCI_BRIDGE_RESOURCES;
-			    idx < PCI_NUM_RESOURCES; idx++) {
+	for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) {
 		r = &dev->resource[idx];
 		if (!r->flags)
 			continue;
-				if (!r->start ||
-				    pci_claim_resource(dev, idx) < 0) {
+		if (!r->start || pci_claim_resource(dev, idx) < 0) {
 			/*
 			 * Something is wrong with the region.
 			 * Invalidate the resource to prevent
@@ -220,7 +213,16 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
 			r->flags = 0;
 		}
 	}
-		}
+}
+
+static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
+{
+	struct pci_bus *bus;
+
+	/* Depth-First Search on bus tree */
+	list_for_each_entry(bus, bus_list, node) {
+		if (bus->self)
+			pcibios_allocate_bridge_resources(bus->self);
 		pcibios_allocate_bus_resources(&bus->children);
 	}
 }