diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 802f56b..e3e17f3 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -646,6 +646,41 @@
 	__pci_setup_bridge(bus, type);
 }
 
+
+int pci_claim_bridge_resource(struct pci_dev *bridge, int i)
+{
+	if (i < PCI_BRIDGE_RESOURCES || i > PCI_BRIDGE_RESOURCE_END)
+		return 0;
+
+	if (pci_claim_resource(bridge, i) == 0)
+		return 0;	/* claimed the window */
+
+	if ((bridge->class >> 8) != PCI_CLASS_BRIDGE_PCI)
+		return 0;
+
+	if (!pci_bus_clip_resource(bridge, i))
+		return -EINVAL;	/* clipping didn't change anything */
+
+	switch (i - PCI_BRIDGE_RESOURCES) {
+	case 0:
+		pci_setup_bridge_io(bridge);
+		break;
+	case 1:
+		pci_setup_bridge_mmio(bridge);
+		break;
+	case 2:
+		pci_setup_bridge_mmio_pref(bridge);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (pci_claim_resource(bridge, i) == 0)
+		return 0;	/* claimed a smaller window */
+
+	return -EINVAL;
+}
+
 /* Check whether the bridge supports optional I/O and
    prefetchable memory ranges. If not, the respective
    base/limit registers must be read-only and read as 0. */
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 44627f1..9603094 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1067,6 +1067,7 @@
 void pci_bus_assign_resources(const struct pci_bus *bus);
 void pci_bus_size_bridges(struct pci_bus *bus);
 int pci_claim_resource(struct pci_dev *, int);
+int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
 void pci_assign_unassigned_resources(void);
 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);