48 /* Device links support. */
162 	list_for_each_entry(link, &dev->links.consumers, s_node) {  in device_is_dependent()
180 	switch (supplier->links.status) {  in device_link_init_status()
182 		switch (consumer->links.status) {  in device_link_init_status()
199 		switch (consumer->links.status) {  in device_link_init_status()
235 	list_for_each_entry(link, &dev->links.consumers, s_node) {  in device_reorder_to_tail()
596 	list_for_each_entry(link, &supplier->links.consumers, s_node) {  in device_link_add()
696 	list_add_tail_rcu(&link->s_node, &supplier->links.consumers);  in device_link_add()
697 	list_add_tail_rcu(&link->c_node, &consumer->links.suppliers);  in device_link_add()
737  * The caller is responsible for adding the links to the supplier devices once
739  * wait_for_suppliers list once links to all the suppliers have been created.
748 	list_add_tail(&consumer->links.needs_suppliers, &wait_for_suppliers);  in device_link_wait_for_supplier()
749 	consumer->links.need_for_probe = need_for_probe;  in device_link_wait_for_supplier()
764  * device_link_add_missing_supplier_links - Add links from consumer devices to
770  * supplier links. If that succeeds, the consumer device is removed from
775  * added all the supplier links for the consumer device. It should return an
787 				 links.needs_suppliers) {  in device_link_add_missing_supplier_links()
790 			list_del_init(&dev->links.needs_suppliers);  in device_link_add_missing_supplier_links()
792 			dev->links.need_for_probe = false;  in device_link_add_missing_supplier_links()
841  * Care is required for hotplugged devices:  Their links are purged on removal
869 	list_for_each_entry(link, &supplier->links.consumers, s_node) {  in device_link_remove()
884 	list_for_each_entry(link, &dev->links.suppliers, c_node) {  in device_links_missing_supplier()
888 		if (link->supplier->links.status == DL_DEV_DRIVER_BOUND) {  in device_links_missing_supplier()
901  * Check links from this device to any suppliers.  Walk the list of the device's
902  * links to suppliers and see if all of them are available.  If not, simply
907  * that function  checks the device's links to consumers.  This means we need to
911  * Links without the DL_FLAG_MANAGED flag set are ignored.
923 	if (!list_empty(&dev->links.needs_suppliers) &&  in device_links_check_suppliers()
924 	    dev->links.need_for_probe) {  in device_links_check_suppliers()
932 	list_for_each_entry(link, &dev->links.suppliers, c_node) {  in device_links_check_suppliers()
944 	dev->links.status = DL_DEV_PROBING;  in device_links_check_suppliers()
955  * Queues a device for a sync_state() callback when the device links write lock
956  * isn't held. This allows the sync_state() execution flow to use device links
978 	list_for_each_entry(link, &dev->links.consumers, s_node) {  in __device_links_queue_sync_state()
992 	if (WARN_ON(!list_empty(&dev->links.defer_hook)))  in __device_links_queue_sync_state()
996 	list_add_tail(&dev->links.defer_hook, list);  in __device_links_queue_sync_state()
1014 	list_for_each_entry_safe(dev, tmp, list, links.defer_hook) {  in device_links_flush_sync_list()
1015 		list_del_init(&dev->links.defer_hook);  in device_links_flush_sync_list()
1053 	list_for_each_entry_safe(dev, tmp, &deferred_sync, links.defer_hook) {  in device_links_supplier_sync_state_resume()
1058 		list_del_init(&dev->links.defer_hook);  in device_links_supplier_sync_state_resume()
1076 	if (list_empty(&sup->links.defer_hook) && dev_has_sync_state(sup))  in __device_links_supplier_defer_sync()
1077 		list_add_tail(&sup->links.defer_hook, &deferred_sync);  in __device_links_supplier_defer_sync()
1095 	val = !list_empty(&dev->links.needs_suppliers)  in waiting_for_supplier_show()
1096 	      && dev->links.need_for_probe;  in waiting_for_supplier_show()
1104  * device_links_driver_bound - Update device links after probing its driver.
1105  * @dev: Device to update the links for.
1107  * The probe has been successful, so update links from this device to any
1110  * Also change the status of @dev's links to suppliers to "active".
1112  * Links without the DL_FLAG_MANAGED flag set are ignored.
1121 	 * the device links it needs to or make new device links as it needs  in device_links_driver_bound()
1125 	list_del_init(&dev->links.needs_suppliers);  in device_links_driver_bound()
1131 	list_for_each_entry(link, &dev->links.consumers, s_node) {  in device_links_driver_bound()
1136 		 * Links created during consumer probe may be in the "consumer  in device_links_driver_bound()
1157 	list_for_each_entry_safe(link, ln, &dev->links.suppliers, c_node) {  in device_links_driver_bound()
1188 	dev->links.status = DL_DEV_DRIVER_BOUND;  in device_links_driver_bound()
1196  * __device_links_no_driver - Update links of a device without a driver.
1199  * Delete all non-persistent links from this device to any suppliers.
1201  * Persistent links stay around, but their status is changed to "available",
1205  * Links without the DL_FLAG_MANAGED flag set are ignored.
1211 	list_for_each_entry_safe_reverse(link, ln, &dev->links.suppliers, c_node) {  in __device_links_no_driver()
1224 		if (link->supplier->links.status == DL_DEV_DRIVER_BOUND) {  in __device_links_no_driver()
1232 	dev->links.status = DL_DEV_NO_DRIVER;  in __device_links_no_driver()
1236  * device_links_no_driver - Update links after failing driver probe.
1239  * Clean up leftover links to consumers for @dev and invoke
1240  * %__device_links_no_driver() to update links to suppliers for it as
1243  * Links without the DL_FLAG_MANAGED flag set are ignored.
1251 	list_for_each_entry(link, &dev->links.consumers, s_node) {  in device_links_no_driver()
1273  * device_links_driver_cleanup - Update links after driver removal.
1276  * Update links to consumers for @dev by changing their status to "dormant" and
1277  * invoke %__device_links_no_driver() to update links to suppliers for it as
1280  * Links without the DL_FLAG_MANAGED flag set are ignored.
1288 	list_for_each_entry_safe(link, ln, &dev->links.consumers, s_node) {  in device_links_driver_cleanup()
1296 		 * autoremove the links between this @dev and its consumer  in device_links_driver_cleanup()
1307 	list_del_init(&dev->links.defer_hook);  in device_links_driver_cleanup()
1314  * device_links_busy - Check if there are any busy links to consumers.
1325  * Links without the DL_FLAG_MANAGED flag set are ignored.
1334 	list_for_each_entry(link, &dev->links.consumers, s_node) {  in device_links_busy()
1346 	dev->links.status = DL_DEV_UNBINDING;  in device_links_busy()
1356  * Walk the list of links to consumers for @dev and if any of them is in the
1365  * Links without the DL_FLAG_MANAGED flag set are ignored.
1374 	list_for_each_entry(link, &dev->links.consumers, s_node) {  in device_links_unbind_consumers()
1407  * device_links_purge - Delete existing links to other devices.
1418 	list_del_init(&dev->links.needs_suppliers);  in device_links_purge()
1422 	 * Delete all of the remaining links from this device to any other  in device_links_purge()
1427 	list_for_each_entry_safe_reverse(link, ln, &dev->links.suppliers, c_node) {  in device_links_purge()
1432 	list_for_each_entry_safe_reverse(link, ln, &dev->links.consumers, s_node) {  in device_links_purge()
1507 		list_add_tail(&dev->links.defer_hook, &deferred_fw_devlink);  in fw_devlink_link_device()
1520  * fw_devlink_pause - Pause parsing of fwnode to create device links
1522  * Calling this function defers any fwnode parsing to create device links until
1528  *   links.
1569 /** fw_devlink_resume - Resume parsing of fwnode to create device links
1599 	list_for_each_entry_safe(dev, tmp, &probe_list, links.defer_hook) {  in fw_devlink_resume()
1600 		list_del_init(&dev->links.defer_hook);  in fw_devlink_resume()
1604 /* Device links support end. */
2456 	INIT_LIST_HEAD(&dev->links.consumers);  in device_initialize()
2457 	INIT_LIST_HEAD(&dev->links.suppliers);  in device_initialize()
2458 	INIT_LIST_HEAD(&dev->links.needs_suppliers);  in device_initialize()
2459 	INIT_LIST_HEAD(&dev->links.defer_hook);  in device_initialize()
2460 	dev->links.status = DL_DEV_NO_DRIVER;  in device_initialize()