39 static struct bus_type *bus_get(struct bus_type *bus)  in bus_get()  argument
41 	if (bus) {  in bus_get()
42 		kset_get(&bus->p->subsys);  in bus_get()
43 		return bus;  in bus_get()
48 static void bus_put(struct bus_type *bus)  in bus_put()  argument
50 	if (bus)  in bus_put()
51 		kset_put(&bus->p->subsys);  in bus_put()
107 		ret = bus_attr->show(subsys_priv->bus, buf);  in bus_attr_show()
119 		ret = bus_attr->store(subsys_priv->bus, buf, count);  in bus_attr_store()
128 int bus_create_file(struct bus_type *bus, struct bus_attribute *attr)  in bus_create_file()  argument
131 	if (bus_get(bus)) {  in bus_create_file()
132 		error = sysfs_create_file(&bus->p->subsys.kobj, &attr->attr);  in bus_create_file()
133 		bus_put(bus);  in bus_create_file()
140 void bus_remove_file(struct bus_type *bus, struct bus_attribute *attr)  in bus_remove_file()  argument
142 	if (bus_get(bus)) {  in bus_remove_file()
143 		sysfs_remove_file(&bus->p->subsys.kobj, &attr->attr);  in bus_remove_file()
144 		bus_put(bus);  in bus_remove_file()
153 	struct bus_type *bus = priv->bus;  in bus_release()  local
156 	bus->p = NULL;  in bus_release()
183 	struct bus_type *bus = bus_get(drv->bus);  in unbind_store()  local
187 	dev = bus_find_device_by_name(bus, NULL, buf);  in unbind_store()
197 	bus_put(bus);  in unbind_store()
210 	struct bus_type *bus = bus_get(drv->bus);  in bind_store()  local
214 	dev = bus_find_device_by_name(bus, NULL, buf);  in bind_store()
233 	bus_put(bus);  in bind_store()
238 static ssize_t show_drivers_autoprobe(struct bus_type *bus, char *buf)  in show_drivers_autoprobe()  argument
240 	return sprintf(buf, "%d\n", bus->p->drivers_autoprobe);  in show_drivers_autoprobe()
243 static ssize_t store_drivers_autoprobe(struct bus_type *bus,  in store_drivers_autoprobe()  argument
247 		bus->p->drivers_autoprobe = 0;  in store_drivers_autoprobe()
249 		bus->p->drivers_autoprobe = 1;  in store_drivers_autoprobe()
253 static ssize_t store_drivers_probe(struct bus_type *bus,  in store_drivers_probe()  argument
259 	dev = bus_find_device_by_name(bus, NULL, buf);  in store_drivers_probe()
300 int bus_for_each_dev(struct bus_type *bus, struct device *start,  in bus_for_each_dev()  argument
307 	if (!bus || !bus->p)  in bus_for_each_dev()
310 	klist_iter_init_node(&bus->p->klist_devices, &i,  in bus_for_each_dev()
334 struct device *bus_find_device(struct bus_type *bus,  in bus_find_device()  argument
341 	if (!bus || !bus->p)  in bus_find_device()
344 	klist_iter_init_node(&bus->p->klist_devices, &i,  in bus_find_device()
371 struct device *bus_find_device_by_name(struct bus_type *bus,  in bus_find_device_by_name()  argument
374 	return bus_find_device(bus, start, (void *)name, match_name);  in bus_find_device_by_name()
450 int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,  in bus_for_each_drv()  argument
457 	if (!bus)  in bus_for_each_drv()
460 	klist_iter_init_node(&bus->p->klist_drivers, &i,  in bus_for_each_drv()
469 static int device_add_attrs(struct bus_type *bus, struct device *dev)  in device_add_attrs()  argument
474 	if (!bus->dev_attrs)  in device_add_attrs()
477 	for (i = 0; bus->dev_attrs[i].attr.name; i++) {  in device_add_attrs()
478 		error = device_create_file(dev, &bus->dev_attrs[i]);  in device_add_attrs()
481 				device_remove_file(dev, &bus->dev_attrs[i]);  in device_add_attrs()
488 static void device_remove_attrs(struct bus_type *bus, struct device *dev)  in device_remove_attrs()  argument
492 	if (bus->dev_attrs) {  in device_remove_attrs()
493 		for (i = 0; bus->dev_attrs[i].attr.name; i++)  in device_remove_attrs()
494 			device_remove_file(dev, &bus->dev_attrs[i]);  in device_remove_attrs()
508 	struct bus_type *bus = bus_get(dev->bus);  in bus_add_device()  local
511 	if (bus) {  in bus_add_device()
512 		pr_debug("bus: '%s': add device %s\n", bus->name, dev_name(dev));  in bus_add_device()
513 		error = device_add_attrs(bus, dev);  in bus_add_device()
516 		error = device_add_groups(dev, bus->dev_groups);  in bus_add_device()
519 		error = sysfs_create_link(&bus->p->devices_kset->kobj,  in bus_add_device()
524 				&dev->bus->p->subsys.kobj, "subsystem");  in bus_add_device()
527 		klist_add_tail(&dev->p->knode_bus, &bus->p->klist_devices);  in bus_add_device()
532 	sysfs_remove_link(&bus->p->devices_kset->kobj, dev_name(dev));  in bus_add_device()
534 	device_remove_groups(dev, bus->dev_groups);  in bus_add_device()
536 	device_remove_attrs(bus, dev);  in bus_add_device()
538 	bus_put(dev->bus);  in bus_add_device()
550 	struct bus_type *bus = dev->bus;  in bus_probe_device()  local
554 	if (!bus)  in bus_probe_device()
557 	if (bus->p->drivers_autoprobe) {  in bus_probe_device()
562 	mutex_lock(&bus->p->mutex);  in bus_probe_device()
563 	list_for_each_entry(sif, &bus->p->interfaces, node)  in bus_probe_device()
566 	mutex_unlock(&bus->p->mutex);  in bus_probe_device()
581 	struct bus_type *bus = dev->bus;  in bus_remove_device()  local
584 	if (!bus)  in bus_remove_device()
587 	mutex_lock(&bus->p->mutex);  in bus_remove_device()
588 	list_for_each_entry(sif, &bus->p->interfaces, node)  in bus_remove_device()
591 	mutex_unlock(&bus->p->mutex);  in bus_remove_device()
594 	sysfs_remove_link(&dev->bus->p->devices_kset->kobj,  in bus_remove_device()
596 	device_remove_attrs(dev->bus, dev);  in bus_remove_device()
597 	device_remove_groups(dev, dev->bus->dev_groups);  in bus_remove_device()
602 		 dev->bus->name, dev_name(dev));  in bus_remove_device()
604 	bus_put(dev->bus);  in bus_remove_device()
630 static int add_probe_files(struct bus_type *bus)  in add_probe_files()  argument
634 	retval = bus_create_file(bus, &bus_attr_drivers_probe);  in add_probe_files()
638 	retval = bus_create_file(bus, &bus_attr_drivers_autoprobe);  in add_probe_files()
640 		bus_remove_file(bus, &bus_attr_drivers_probe);  in add_probe_files()
645 static void remove_probe_files(struct bus_type *bus)  in remove_probe_files()  argument
647 	bus_remove_file(bus, &bus_attr_drivers_autoprobe);  in remove_probe_files()
648 	bus_remove_file(bus, &bus_attr_drivers_probe);  in remove_probe_files()
668 	struct bus_type *bus;  in bus_add_driver()  local
672 	bus = bus_get(drv->bus);  in bus_add_driver()
673 	if (!bus)  in bus_add_driver()
676 	pr_debug("bus: '%s': add driver %s\n", bus->name, drv->name);  in bus_add_driver()
686 	priv->kobj.kset = bus->p->drivers_kset;  in bus_add_driver()
692 	klist_add_tail(&priv->knode_bus, &bus->p->klist_drivers);  in bus_add_driver()
693 	if (drv->bus->p->drivers_autoprobe) {  in bus_add_driver()
705 	error = driver_add_groups(drv, bus->drv_groups);  in bus_add_driver()
728 	bus_put(bus);  in bus_add_driver()
742 	if (!drv->bus)  in bus_remove_driver()
747 	driver_remove_groups(drv, drv->bus->drv_groups);  in bus_remove_driver()
750 	pr_debug("bus: '%s': remove driver %s\n", drv->bus->name, drv->name);  in bus_remove_driver()
754 	bus_put(drv->bus);  in bus_remove_driver()
781 int bus_rescan_devices(struct bus_type *bus)  in bus_rescan_devices()  argument
783 	return bus_for_each_dev(bus, NULL, NULL, bus_rescan_devices_helper);  in bus_rescan_devices()
826 static int bus_add_groups(struct bus_type *bus,  in bus_add_groups()  argument
829 	return sysfs_create_groups(&bus->p->subsys.kobj, groups);  in bus_add_groups()
832 static void bus_remove_groups(struct bus_type *bus,  in bus_remove_groups()  argument
835 	sysfs_remove_groups(&bus->p->subsys.kobj, groups);  in bus_remove_groups()
854 static ssize_t bus_uevent_store(struct bus_type *bus,  in bus_uevent_store()  argument
860 		kobject_uevent(&bus->p->subsys.kobj, action);  in bus_uevent_store()
873 int bus_register(struct bus_type *bus)  in bus_register()  argument
877 	struct lock_class_key *key = &bus->lock_key;  in bus_register()
883 	priv->bus = bus;  in bus_register()
884 	bus->p = priv;  in bus_register()
888 	retval = kobject_set_name(&priv->subsys.kobj, "%s", bus->name);  in bus_register()
900 	retval = bus_create_file(bus, &bus_attr_uevent);  in bus_register()
923 	retval = add_probe_files(bus);  in bus_register()
927 	retval = bus_add_groups(bus, bus->bus_groups);  in bus_register()
931 	pr_debug("bus: '%s': registered\n", bus->name);  in bus_register()
935 	remove_probe_files(bus);  in bus_register()
937 	kset_unregister(bus->p->drivers_kset);  in bus_register()
939 	kset_unregister(bus->p->devices_kset);  in bus_register()
941 	bus_remove_file(bus, &bus_attr_uevent);  in bus_register()
943 	kset_unregister(&bus->p->subsys);  in bus_register()
945 	kfree(bus->p);  in bus_register()
946 	bus->p = NULL;  in bus_register()
958 void bus_unregister(struct bus_type *bus)  in bus_unregister()  argument
960 	pr_debug("bus: '%s': unregistering\n", bus->name);  in bus_unregister()
961 	if (bus->dev_root)  in bus_unregister()
962 		device_unregister(bus->dev_root);  in bus_unregister()
963 	bus_remove_groups(bus, bus->bus_groups);  in bus_unregister()
964 	remove_probe_files(bus);  in bus_unregister()
965 	kset_unregister(bus->p->drivers_kset);  in bus_unregister()
966 	kset_unregister(bus->p->devices_kset);  in bus_unregister()
967 	bus_remove_file(bus, &bus_attr_uevent);  in bus_unregister()
968 	kset_unregister(&bus->p->subsys);  in bus_unregister()
972 int bus_register_notifier(struct bus_type *bus, struct notifier_block *nb)  in bus_register_notifier()  argument
974 	return blocking_notifier_chain_register(&bus->p->bus_notifier, nb);  in bus_register_notifier()
978 int bus_unregister_notifier(struct bus_type *bus, struct notifier_block *nb)  in bus_unregister_notifier()  argument
980 	return blocking_notifier_chain_unregister(&bus->p->bus_notifier, nb);  in bus_unregister_notifier()
984 struct kset *bus_get_kset(struct bus_type *bus)  in bus_get_kset()  argument
986 	return &bus->p->subsys;  in bus_get_kset()
990 struct klist *bus_get_device_klist(struct bus_type *bus)  in bus_get_device_klist()  argument
992 	return &bus->p->klist_devices;  in bus_get_device_klist()
1025 void bus_sort_breadthfirst(struct bus_type *bus,  in bus_sort_breadthfirst()  argument
1036 	device_klist = bus_get_device_klist(bus);  in bus_sort_breadthfirst()