1 files changed, 13 insertions, 137 deletions

diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index bedb370459f..86585508e9c 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -167,150 +167,26 @@ pcibios_make_OF_bus_map(void)
 #endif
 }
 
-typedef int (*pci_OF_scan_iterator)(struct device_node* node, void* data);
-
-static struct device_node*
-scan_OF_pci_childs(struct device_node *parent, pci_OF_scan_iterator filter, void* data)
-{
-	struct device_node *node;
-	struct device_node* sub_node;
-
-	for_each_child_of_node(parent, node) {
-		const unsigned int *class_code;
-	
-		if (filter(node, data)) {
-			of_node_put(node);
-			return node;
-		}
-
-		/* For PCI<->PCI bridges or CardBus bridges, we go down
-		 * Note: some OFs create a parent node "multifunc-device" as
-		 * a fake root for all functions of a multi-function device,
-		 * we go down them as well.
-		 */
-		class_code = of_get_property(node, "class-code", NULL);
-		if ((!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
-			(*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) &&
-			strcmp(node->name, "multifunc-device"))
-			continue;
-		sub_node = scan_OF_pci_childs(node, filter, data);
-		if (sub_node) {
-			of_node_put(node);
-			return sub_node;
-		}
-	}
-	return NULL;
-}
-
-static struct device_node *scan_OF_for_pci_dev(struct device_node *parent,
-					       unsigned int devfn)
-{
-	struct device_node *np, *cnp;
-	const u32 *reg;
-	unsigned int psize;
-
-	for_each_child_of_node(parent, np) {
-		reg = of_get_property(np, "reg", &psize);
-                if (reg && psize >= 4 && ((reg[0] >> 8) & 0xff) == devfn)
-			return np;
-
-		/* Note: some OFs create a parent node "multifunc-device" as
-		 * a fake root for all functions of a multi-function device,
-		 * we go down them as well. */
-                if (!strcmp(np->name, "multifunc-device")) {
-                        cnp = scan_OF_for_pci_dev(np, devfn);
-                        if (cnp)
-                                return cnp;
-                }
-	}
-	return NULL;
-}
-
-
-static struct device_node *scan_OF_for_pci_bus(struct pci_bus *bus)
-{
-	struct device_node *parent, *np;
-
-	/* Are we a root bus ? */
-	if (bus->self == NULL || bus->parent == NULL) {
-		struct pci_controller *hose = pci_bus_to_host(bus);
-		if (hose == NULL)
-			return NULL;
-		return of_node_get(hose->dn);
-	}
-
-	/* not a root bus, we need to get our parent */
-	parent = scan_OF_for_pci_bus(bus->parent);
-	if (parent == NULL)
-		return NULL;
-
-	/* now iterate for children for a match */
-	np = scan_OF_for_pci_dev(parent, bus->self->devfn);
-	of_node_put(parent);
-
-	return np;
-}
-
-/*
- * Scans the OF tree for a device node matching a PCI device
- */
-struct device_node *
-pci_busdev_to_OF_node(struct pci_bus *bus, int devfn)
-{
-	struct device_node *parent, *np;
-
-	pr_debug("pci_busdev_to_OF_node(%d,0x%x)\n", bus->number, devfn);
-	parent = scan_OF_for_pci_bus(bus);
-	if (parent == NULL)
-		return NULL;
-	pr_debug(" parent is %s\n", parent ? parent->full_name : "<NULL>");
-	np = scan_OF_for_pci_dev(parent, devfn);
-	of_node_put(parent);
-	pr_debug(" result is %s\n", np ? np->full_name : "<NULL>");
-
-	/* XXX most callers don't release the returned node
-	 * mostly because ppc64 doesn't increase the refcount,
-	 * we need to fix that.
-	 */
-	return np;
-}
-EXPORT_SYMBOL(pci_busdev_to_OF_node);
-
-struct device_node*
-pci_device_to_OF_node(struct pci_dev *dev)
-{
-	return pci_busdev_to_OF_node(dev->bus, dev->devfn);
-}
-EXPORT_SYMBOL(pci_device_to_OF_node);
-
-static int
-find_OF_pci_device_filter(struct device_node* node, void* data)
-{
-	return ((void *)node == data);
-}
 
 /*
  * Returns the PCI device matching a given OF node
  */
-int
-pci_device_from_OF_node(struct device_node* node, u8* bus, u8* devfn)
+int pci_device_from_OF_node(struct device_node *node, u8 *bus, u8 *devfn)
 {
-	const unsigned int *reg;
-	struct pci_controller* hose;
-	struct pci_dev* dev = NULL;
-	
-	/* Make sure it's really a PCI device */
-	hose = pci_find_hose_for_OF_device(node);
-	if (!hose || !hose->dn)
-		return -ENODEV;
-	if (!scan_OF_pci_childs(hose->dn,
-			find_OF_pci_device_filter, (void *)node))
+	struct pci_dev *dev = NULL;
+	const __be32 *reg;
+	int size;
+
+	/* Check if it might have a chance to be a PCI device */
+	if (!pci_find_hose_for_OF_device(node))
 		return -ENODEV;
-	reg = of_get_property(node, "reg", NULL);
-	if (!reg)
+
+	reg = of_get_property(node, "reg", &size);
+	if (!reg || size < 5 * sizeof(u32))
 		return -ENODEV;
-	*bus = (reg[0] >> 16) & 0xff;
-	*devfn = ((reg[0] >> 8) & 0xff);
+
+	*bus = (be32_to_cpup(&reg[0]) >> 16) & 0xff;
+	*devfn = (be32_to_cpup(&reg[0]) >> 8) & 0xff;
 
 	/* Ok, here we need some tweak. If we have already renumbered
 	 * all busses, we can't rely on the OF bus number any more.