ia64: Fix resource assignment for root busses

ia64 was assigning resources to root busses after allocations had
been made for child busses.  Calling pcibios_setup_root_windows() from
pcibios_fixup_bus() solves this problem by assigning the resources to
the root bus before child busses are scanned.
Signed-off-by: NMatthew Wilcox <willy@linux.intel.com>
Tested-by: NAndrew Patterson <andrew.patterson@hp.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/ia64/pci/pci.c

@@ -371,8 +371,6 @@ pci_acpi_scan_root(struct acpi_device *device, int domain, int bus)
 	 * such quirk. So we just ignore the case now.
 	 */
 	pbus = pci_scan_bus_parented(NULL, bus, &pci_root_ops, controller);
-	if (pbus)
-		pcibios_setup_root_windows(pbus, controller);
 
 	return pbus;
 
@@ -490,6 +488,8 @@ pcibios_fixup_bus (struct pci_bus *b)
 	if (b->self) {
 		pci_read_bridge_bases(b);
 		pcibios_fixup_bridge_resources(b->self);
+	} else {
+		pcibios_setup_root_windows(b, b->sysdata);
 	}
 	list_for_each_entry(dev, &b->devices, bus_list)
 		pcibios_fixup_device_resources(dev);