allow pci primary busses to have parents in the device model

drivers/pci/probe.c

@@ -548,7 +548,7 @@ int __devinit pci_bus_exists(const struct list_head *list, int nr)
 	return 0;
 }
 
-struct pci_bus * __devinit pci_alloc_primary_bus(int bus)
+struct pci_bus * __devinit pci_alloc_primary_bus_parented(struct device *parent, int bus)
 {
 	struct pci_bus *b;
 
@@ -567,6 +567,7 @@ struct pci_bus * __devinit pci_alloc_primary_bus(int bus)
 	memset(b->dev,0,sizeof(*(b->dev)));
 	sprintf(b->dev->bus_id,"pci%d",bus);
 	strcpy(b->dev->name,"Host/PCI Bridge");
+	b->dev->parent = parent;
 	device_register(b->dev);
 
 	b->number = b->secondary = bus;
@@ -575,9 +576,9 @@ struct pci_bus * __devinit pci_alloc_primary_bus(int bus)
 	return b;
 }
 
-struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
+struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata)
 {
-	struct pci_bus *b = pci_alloc_primary_bus(bus);
+	struct pci_bus *b = pci_alloc_primary_bus_parented(parent, bus);
 	if (b) {
 		b->sysdata = sysdata;
 		b->ops = ops;

include/linux/pci.h

@@ -558,8 +558,16 @@ void pcibios_fixup_pbus_ranges(struct pci_bus *, struct pbus_set_ranges_data *);
 /* Generic PCI functions used internally */
 
 int pci_bus_exists(const struct list_head *list, int nr);
-struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
-struct pci_bus *pci_alloc_primary_bus(int bus);
+struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
+static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
+{
+	return pci_scan_bus_parented(NULL, bus, ops, sysdata);
+}
+struct pci_bus *pci_alloc_primary_bus_parented(struct device * parent, int bus);
+static inline struct pci_bus *pci_alloc_primary_bus(int bus)
+{
+	return pci_alloc_primary_bus_parented(NULL, bus);
+}
 struct pci_dev *pci_scan_slot(struct pci_dev *temp);
 int pci_proc_attach_device(struct pci_dev *dev);
 int pci_proc_detach_device(struct pci_dev *dev);