40 static struct bus_type *bus_get(struct bus_type *bus)  in bus_get()  argument
42 	if (bus) {  in bus_get()
43 		kset_get(&bus->p->subsys);  in bus_get()
44 		return bus;  in bus_get()
49 static void bus_put(struct bus_type *bus)  in bus_put()  argument
51 	if (bus)  in bus_put()
52 		kset_put(&bus->p->subsys);  in bus_put()
108 		ret = bus_attr->show(subsys_priv->bus, buf);  in bus_attr_show()
120 		ret = bus_attr->store(subsys_priv->bus, buf, count);  in bus_attr_store()
129 int bus_create_file(struct bus_type *bus, struct bus_attribute *attr)  in bus_create_file()  argument
132 	if (bus_get(bus)) {  in bus_create_file()
133 		error = sysfs_create_file(&bus->p->subsys.kobj, &attr->attr);  in bus_create_file()
134 		bus_put(bus);  in bus_create_file()
141 void bus_remove_file(struct bus_type *bus, struct bus_attribute *attr)  in bus_remove_file()  argument
143 	if (bus_get(bus)) {  in bus_remove_file()
144 		sysfs_remove_file(&bus->p->subsys.kobj, &attr->attr);  in bus_remove_file()
145 		bus_put(bus);  in bus_remove_file()
154 	struct bus_type *bus = priv->bus;  in bus_release()  local
157 	bus->p = NULL;  in bus_release()
184 	struct bus_type *bus = bus_get(drv->bus);  in unbind_store()  local
188 	dev = bus_find_device_by_name(bus, NULL, buf);  in unbind_store()
198 	bus_put(bus);  in unbind_store()
211 	struct bus_type *bus = bus_get(drv->bus);  in bind_store()  local
215 	dev = bus_find_device_by_name(bus, NULL, buf);  in bind_store()
234 	bus_put(bus);  in bind_store()
239 static ssize_t show_drivers_autoprobe(struct bus_type *bus, char *buf)  in show_drivers_autoprobe()  argument
241 	return sprintf(buf, "%d\n", bus->p->drivers_autoprobe);  in show_drivers_autoprobe()
244 static ssize_t store_drivers_autoprobe(struct bus_type *bus,  in store_drivers_autoprobe()  argument
248 		bus->p->drivers_autoprobe = 0;  in store_drivers_autoprobe()
250 		bus->p->drivers_autoprobe = 1;  in store_drivers_autoprobe()
254 static ssize_t store_drivers_probe(struct bus_type *bus,  in store_drivers_probe()  argument
260 	dev = bus_find_device_by_name(bus, NULL, buf);  in store_drivers_probe()
301 int bus_for_each_dev(struct bus_type *bus, struct device *start,  in bus_for_each_dev()  argument
308 	if (!bus || !bus->p)  in bus_for_each_dev()
311 	klist_iter_init_node(&bus->p->klist_devices, &i,  in bus_for_each_dev()
335 struct device *bus_find_device(struct bus_type *bus,  in bus_find_device()  argument
342 	if (!bus || !bus->p)  in bus_find_device()
345 	klist_iter_init_node(&bus->p->klist_devices, &i,  in bus_find_device()
372 struct device *bus_find_device_by_name(struct bus_type *bus,  in bus_find_device_by_name()  argument
375 	return bus_find_device(bus, start, (void *)name, match_name);  in bus_find_device_by_name()
451 int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,  in bus_for_each_drv()  argument
458 	if (!bus)  in bus_for_each_drv()
461 	klist_iter_init_node(&bus->p->klist_drivers, &i,  in bus_for_each_drv()
470 static int device_add_attrs(struct bus_type *bus, struct device *dev)  in device_add_attrs()  argument
475 	if (!bus->dev_attrs)  in device_add_attrs()
478 	for (i = 0; bus->dev_attrs[i].attr.name; i++) {  in device_add_attrs()
479 		error = device_create_file(dev, &bus->dev_attrs[i]);  in device_add_attrs()
482 				device_remove_file(dev, &bus->dev_attrs[i]);  in device_add_attrs()
489 static void device_remove_attrs(struct bus_type *bus, struct device *dev)  in device_remove_attrs()  argument
493 	if (bus->dev_attrs) {  in device_remove_attrs()
494 		for (i = 0; bus->dev_attrs[i].attr.name; i++)  in device_remove_attrs()
495 			device_remove_file(dev, &bus->dev_attrs[i]);  in device_remove_attrs()
509 	struct bus_type *bus = bus_get(dev->bus);  in bus_add_device()  local
512 	if (bus) {  in bus_add_device()
513 		pr_debug("bus: '%s': add device %s\n", bus->name, dev_name(dev));  in bus_add_device()
514 		error = device_add_attrs(bus, dev);  in bus_add_device()
517 		error = device_add_groups(dev, bus->dev_groups);  in bus_add_device()
520 		error = sysfs_create_link(&bus->p->devices_kset->kobj,  in bus_add_device()
525 				&dev->bus->p->subsys.kobj, "subsystem");  in bus_add_device()
528 		klist_add_tail(&dev->p->knode_bus, &bus->p->klist_devices);  in bus_add_device()
533 	sysfs_remove_link(&bus->p->devices_kset->kobj, dev_name(dev));  in bus_add_device()
535 	device_remove_groups(dev, bus->dev_groups);  in bus_add_device()
537 	device_remove_attrs(bus, dev);  in bus_add_device()
539 	bus_put(dev->bus);  in bus_add_device()
551 	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()
560 	mutex_lock(&bus->p->mutex);  in bus_probe_device()
561 	list_for_each_entry(sif, &bus->p->interfaces, node)  in bus_probe_device()
564 	mutex_unlock(&bus->p->mutex);  in bus_probe_device()
579 	struct bus_type *bus = dev->bus;  in bus_remove_device()  local
582 	if (!bus)  in bus_remove_device()
585 	mutex_lock(&bus->p->mutex);  in bus_remove_device()
586 	list_for_each_entry(sif, &bus->p->interfaces, node)  in bus_remove_device()
589 	mutex_unlock(&bus->p->mutex);  in bus_remove_device()
592 	sysfs_remove_link(&dev->bus->p->devices_kset->kobj,  in bus_remove_device()
594 	device_remove_attrs(dev->bus, dev);  in bus_remove_device()
595 	device_remove_groups(dev, dev->bus->dev_groups);  in bus_remove_device()
600 		 dev->bus->name, dev_name(dev));  in bus_remove_device()
602 	bus_put(dev->bus);  in bus_remove_device()
628 static int add_probe_files(struct bus_type *bus)  in add_probe_files()  argument
632 	retval = bus_create_file(bus, &bus_attr_drivers_probe);  in add_probe_files()
636 	retval = bus_create_file(bus, &bus_attr_drivers_autoprobe);  in add_probe_files()
638 		bus_remove_file(bus, &bus_attr_drivers_probe);  in add_probe_files()
643 static void remove_probe_files(struct bus_type *bus)  in remove_probe_files()  argument
645 	bus_remove_file(bus, &bus_attr_drivers_autoprobe);  in remove_probe_files()
646 	bus_remove_file(bus, &bus_attr_drivers_probe);  in remove_probe_files()
668 		 drv->bus->name, drv->name, ret);  in driver_attach_async()
677 	struct bus_type *bus;  in bus_add_driver()  local
681 	bus = bus_get(drv->bus);  in bus_add_driver()
682 	if (!bus)  in bus_add_driver()
685 	pr_debug("bus: '%s': add driver %s\n", bus->name, drv->name);  in bus_add_driver()
695 	priv->kobj.kset = bus->p->drivers_kset;  in bus_add_driver()
701 	klist_add_tail(&priv->knode_bus, &bus->p->klist_drivers);  in bus_add_driver()
702 	if (drv->bus->p->drivers_autoprobe) {  in bus_add_driver()
705 				drv->bus->name, drv->name);  in bus_add_driver()
720 	error = driver_add_groups(drv, bus->drv_groups);  in bus_add_driver()
743 	bus_put(bus);  in bus_add_driver()
757 	if (!drv->bus)  in bus_remove_driver()
762 	driver_remove_groups(drv, drv->bus->drv_groups);  in bus_remove_driver()
765 	pr_debug("bus: '%s': remove driver %s\n", drv->bus->name, drv->name);  in bus_remove_driver()
769 	bus_put(drv->bus);  in bus_remove_driver()
796 int bus_rescan_devices(struct bus_type *bus)  in bus_rescan_devices()  argument
798 	return bus_for_each_dev(bus, NULL, NULL, bus_rescan_devices_helper);  in bus_rescan_devices()
841 static int bus_add_groups(struct bus_type *bus,  in bus_add_groups()  argument
844 	return sysfs_create_groups(&bus->p->subsys.kobj, groups);  in bus_add_groups()
847 static void bus_remove_groups(struct bus_type *bus,  in bus_remove_groups()  argument
850 	sysfs_remove_groups(&bus->p->subsys.kobj, groups);  in bus_remove_groups()
869 static ssize_t bus_uevent_store(struct bus_type *bus,  in bus_uevent_store()  argument
875 		kobject_uevent(&bus->p->subsys.kobj, action);  in bus_uevent_store()
888 int bus_register(struct bus_type *bus)  in bus_register()  argument
892 	struct lock_class_key *key = &bus->lock_key;  in bus_register()
898 	priv->bus = bus;  in bus_register()
899 	bus->p = priv;  in bus_register()
903 	retval = kobject_set_name(&priv->subsys.kobj, "%s", bus->name);  in bus_register()
915 	retval = bus_create_file(bus, &bus_attr_uevent);  in bus_register()
938 	retval = add_probe_files(bus);  in bus_register()
942 	retval = bus_add_groups(bus, bus->bus_groups);  in bus_register()
946 	pr_debug("bus: '%s': registered\n", bus->name);  in bus_register()
950 	remove_probe_files(bus);  in bus_register()
952 	kset_unregister(bus->p->drivers_kset);  in bus_register()
954 	kset_unregister(bus->p->devices_kset);  in bus_register()
956 	bus_remove_file(bus, &bus_attr_uevent);  in bus_register()
958 	kset_unregister(&bus->p->subsys);  in bus_register()
960 	kfree(bus->p);  in bus_register()
961 	bus->p = NULL;  in bus_register()
973 void bus_unregister(struct bus_type *bus)  in bus_unregister()  argument
975 	pr_debug("bus: '%s': unregistering\n", bus->name);  in bus_unregister()
976 	if (bus->dev_root)  in bus_unregister()
977 		device_unregister(bus->dev_root);  in bus_unregister()
978 	bus_remove_groups(bus, bus->bus_groups);  in bus_unregister()
979 	remove_probe_files(bus);  in bus_unregister()
980 	kset_unregister(bus->p->drivers_kset);  in bus_unregister()
981 	kset_unregister(bus->p->devices_kset);  in bus_unregister()
982 	bus_remove_file(bus, &bus_attr_uevent);  in bus_unregister()
983 	kset_unregister(&bus->p->subsys);  in bus_unregister()
987 int bus_register_notifier(struct bus_type *bus, struct notifier_block *nb)  in bus_register_notifier()  argument
989 	return blocking_notifier_chain_register(&bus->p->bus_notifier, nb);  in bus_register_notifier()
993 int bus_unregister_notifier(struct bus_type *bus, struct notifier_block *nb)  in bus_unregister_notifier()  argument
995 	return blocking_notifier_chain_unregister(&bus->p->bus_notifier, nb);  in bus_unregister_notifier()
999 struct kset *bus_get_kset(struct bus_type *bus)  in bus_get_kset()  argument
1001 	return &bus->p->subsys;  in bus_get_kset()
1005 struct klist *bus_get_device_klist(struct bus_type *bus)  in bus_get_device_klist()  argument
1007 	return &bus->p->klist_devices;  in bus_get_device_klist()
1040 void bus_sort_breadthfirst(struct bus_type *bus,  in bus_sort_breadthfirst()  argument
1051 	device_klist = bus_get_device_klist(bus);  in bus_sort_breadthfirst()