2  *	drivers/pci/bus.c
27 		printk(KERN_ERR "PCI: can't add bus resource %pR\n", res);  in pci_add_resource()
47 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,  in pci_bus_add_resource()  argument
54 		dev_err(&bus->dev, "can't add %pR resource\n", res);  in pci_bus_add_resource()
60 	list_add_tail(&bus_res->list, &bus->resources);  in pci_bus_add_resource()
63 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n)  in pci_bus_resource_n()  argument
68 		return bus->resource[n];  in pci_bus_resource_n()
71 	list_for_each_entry(bus_res, &bus->resources, list) {  in pci_bus_resource_n()
79 void pci_bus_remove_resources(struct pci_bus *bus)  in pci_bus_remove_resources()  argument
84 		bus->resource[i] = NULL;  in pci_bus_remove_resources()
86 	pci_free_resource_list(&bus->resources);  in pci_bus_remove_resources()
90  * pci_bus_alloc_resource - allocate a resource from a parent bus
91  * @bus: PCI bus
100  * Given the PCI bus a device resides on, the size, minimum address,
105 pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,  in pci_bus_alloc_resource()  argument
124 	pci_bus_for_each_resource(bus, r, i) {  in pci_bus_alloc_resource()
170  * pci_bus_add_child - add a child bus
171  * @bus: bus to add
173  * This adds sysfs entries for a single bus
175 int pci_bus_add_child(struct pci_bus *bus)  in pci_bus_add_child()  argument
179 	if (bus->bridge)  in pci_bus_add_child()
180 		bus->dev.parent = bus->bridge;  in pci_bus_add_child()
182 	retval = device_register(&bus->dev);  in pci_bus_add_child()
186 	bus->is_added = 1;  in pci_bus_add_child()
188 	/* Create legacy_io and legacy_mem files for this bus */  in pci_bus_add_child()
189 	pci_create_legacy_files(bus);  in pci_bus_add_child()
196  * @bus: bus to check for new devices
198  * Add newly discovered PCI devices (which are on the bus->devices
200  * entries.  Where a bridge is found, add the discovered bus to
206 void pci_bus_add_devices(const struct pci_bus *bus)  in pci_bus_add_devices()  argument
212 	list_for_each_entry(dev, &bus->devices, bus_list) {  in pci_bus_add_devices()
221 	list_for_each_entry(dev, &bus->devices, bus_list) {  in pci_bus_add_devices()
226 		 * If there is an unattached subordinate bus, attach  in pci_bus_add_devices()
233 			list_add_tail(&child->node, &dev->bus->children);  in pci_bus_add_devices()
239 		 * register the bus with sysfs as the parent is now  in pci_bus_add_devices()
246 			dev_err(&dev->dev, "Error adding bus, continuing\n");  in pci_bus_add_devices()
250 void pci_enable_bridges(struct pci_bus *bus)  in pci_enable_bridges()  argument
255 	list_for_each_entry(dev, &bus->devices, bus_list) {  in pci_enable_bridges()
268 /** pci_walk_bus - walk devices on/under bus, calling callback.
269  *  @top      bus whose devices should be walked
273  *  Walk the given bus, including any bridged devices
274  *  on buses under this bus.  Call the provided callback
285 	struct pci_bus *bus;  in pci_walk_bus()  local
289 	bus = top;  in pci_walk_bus()
293 		if (next == &bus->devices) {  in pci_walk_bus()
294 			/* end of this bus, go up or finish */  in pci_walk_bus()
295 			if (bus == top)  in pci_walk_bus()
297 			next = bus->self->bus_list.next;  in pci_walk_bus()
298 			bus = bus->self->bus;  in pci_walk_bus()
305 			bus = dev->subordinate;  in pci_walk_bus()