1273 static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)  in handler_set_err()  argument
1275 	if (hdl->error == 0)  in handler_set_err()
1276 		hdl->error = err;  in handler_set_err()
1281 int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_handler_init_class()  argument
1285 	mutex_init(&hdl->_lock);  in v4l2_ctrl_handler_init_class()
1286 	hdl->lock = &hdl->_lock;  in v4l2_ctrl_handler_init_class()
1287 	lockdep_set_class_and_name(hdl->lock, key, name);  in v4l2_ctrl_handler_init_class()
1288 	INIT_LIST_HEAD(&hdl->ctrls);  in v4l2_ctrl_handler_init_class()
1289 	INIT_LIST_HEAD(&hdl->ctrl_refs);  in v4l2_ctrl_handler_init_class()
1290 	hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;  in v4l2_ctrl_handler_init_class()
1291 	hdl->buckets = kvcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),  in v4l2_ctrl_handler_init_class()
1293 	hdl->error = hdl->buckets ? 0 : -ENOMEM;  in v4l2_ctrl_handler_init_class()
1294 	v4l2_ctrl_handler_init_request(hdl);  in v4l2_ctrl_handler_init_class()
1295 	return hdl->error;  in v4l2_ctrl_handler_init_class()
1300 void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)  in v4l2_ctrl_handler_free()  argument
1306 	if (hdl == NULL || hdl->buckets == NULL)  in v4l2_ctrl_handler_free()
1309 	v4l2_ctrl_handler_free_request(hdl);  in v4l2_ctrl_handler_free()
1311 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_free()
1313 	list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {  in v4l2_ctrl_handler_free()
1320 	list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {  in v4l2_ctrl_handler_free()
1327 	kvfree(hdl->buckets);  in v4l2_ctrl_handler_free()
1328 	hdl->buckets = NULL;  in v4l2_ctrl_handler_free()
1329 	hdl->cached = NULL;  in v4l2_ctrl_handler_free()
1330 	hdl->error = 0;  in v4l2_ctrl_handler_free()
1331 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_free()
1332 	mutex_destroy(&hdl->_lock);  in v4l2_ctrl_handler_free()
1343 		struct v4l2_ctrl_handler *hdl, u32 id)  in find_private_ref()  argument
1348 	list_for_each_entry(ref, &hdl->ctrl_refs, node) {  in find_private_ref()
1364 struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)  in find_ref()  argument
1373 		return find_private_ref(hdl, id);  in find_ref()
1374 	bucket = id % hdl->nr_of_buckets;  in find_ref()
1377 	if (hdl->cached && hdl->cached->ctrl->id == id)  in find_ref()
1378 		return hdl->cached;  in find_ref()
1381 	ref = hdl->buckets ? hdl->buckets[bucket] : NULL;  in find_ref()
1386 		hdl->cached = ref; /* cache it! */  in find_ref()
1391 struct v4l2_ctrl_ref *find_ref_lock(struct v4l2_ctrl_handler *hdl, u32 id)  in find_ref_lock()  argument
1395 	if (hdl) {  in find_ref_lock()
1396 		mutex_lock(hdl->lock);  in find_ref_lock()
1397 		ref = find_ref(hdl, id);  in find_ref_lock()
1398 		mutex_unlock(hdl->lock);  in find_ref_lock()
1404 struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)  in v4l2_ctrl_find()  argument
1406 	struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);  in v4l2_ctrl_find()
1413 int handler_new_ref(struct v4l2_ctrl_handler *hdl,  in handler_new_ref()  argument
1422 	int bucket = id % hdl->nr_of_buckets;	/* which bucket to use */  in handler_new_ref()
1433 	    id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)  in handler_new_ref()
1434 		if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))  in handler_new_ref()
1435 			return hdl->error;  in handler_new_ref()
1437 	if (hdl->error)  in handler_new_ref()
1438 		return hdl->error;  in handler_new_ref()
1444 		return handler_set_err(hdl, -ENOMEM);  in handler_new_ref()
1452 	mutex_lock(hdl->lock);  in handler_new_ref()
1458 	if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {  in handler_new_ref()
1459 		list_add_tail(&new_ref->node, &hdl->ctrl_refs);  in handler_new_ref()
1464 	list_for_each_entry(ref, &hdl->ctrl_refs, node) {  in handler_new_ref()
1478 	new_ref->next = hdl->buckets[bucket];  in handler_new_ref()
1479 	hdl->buckets[bucket] = new_ref;  in handler_new_ref()
1482 	if (ctrl->handler == hdl) {  in handler_new_ref()
1493 	mutex_unlock(hdl->lock);  in handler_new_ref()
1498 static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new()  argument
1517 	if (hdl->error)  in v4l2_ctrl_new()
1619 		handler_set_err(hdl, -ERANGE);  in v4l2_ctrl_new()
1624 		handler_set_err(hdl, err);  in v4l2_ctrl_new()
1630 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new()
1641 			handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new()
1666 		handler_set_err(hdl, -ENOMEM);  in v4l2_ctrl_new()
1672 	ctrl->handler = hdl;  in v4l2_ctrl_new()
1731 	if (handler_new_ref(hdl, ctrl, NULL, false, false)) {  in v4l2_ctrl_new()
1736 	mutex_lock(hdl->lock);  in v4l2_ctrl_new()
1737 	list_add_tail(&ctrl->node, &hdl->ctrls);  in v4l2_ctrl_new()
1738 	mutex_unlock(hdl->lock);  in v4l2_ctrl_new()
1742 struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_custom()  argument
1770 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_custom()
1774 	ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,  in v4l2_ctrl_new_custom()
1786 struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std()  argument
1798 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std()
1801 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std()
1808 struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std_menu()  argument
1831 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu()
1834 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std_menu()
1841 struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std_menu_items()  argument
1857 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu_items()
1863 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu_items()
1866 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std_menu_items()
1874 struct v4l2_ctrl *v4l2_ctrl_new_std_compound(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std_compound()  argument
1885 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_compound()
1888 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std_compound()
1895 struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_int_menu()  argument
1909 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_int_menu()
1912 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_int_menu()
1919 int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_add_handler()  argument
1928 	if (!hdl || !add || hdl == add)  in v4l2_ctrl_add_handler()
1930 	if (hdl->error)  in v4l2_ctrl_add_handler()
1931 		return hdl->error;  in v4l2_ctrl_add_handler()
1945 		ret = handler_new_ref(hdl, ctrl, NULL, from_other_dev, false);  in v4l2_ctrl_add_handler()
2188 int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)  in __v4l2_ctrl_handler_setup()  argument
2193 	if (hdl == NULL)  in __v4l2_ctrl_handler_setup()
2196 	lockdep_assert_held(hdl->lock);  in __v4l2_ctrl_handler_setup()
2198 	list_for_each_entry(ctrl, &hdl->ctrls, node)  in __v4l2_ctrl_handler_setup()
2201 	list_for_each_entry(ctrl, &hdl->ctrls, node) {  in __v4l2_ctrl_handler_setup()
2227 int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)  in v4l2_ctrl_handler_setup()  argument
2231 	if (hdl == NULL)  in v4l2_ctrl_handler_setup()
2234 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_setup()
2235 	ret = __v4l2_ctrl_handler_setup(hdl);  in v4l2_ctrl_handler_setup()
2236 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_setup()
2269 void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_handler_log_status()  argument
2276 	if (!hdl)  in v4l2_ctrl_handler_log_status()
2283 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_log_status()
2284 	list_for_each_entry(ctrl, &hdl->ctrls, node)  in v4l2_ctrl_handler_log_status()
2287 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_log_status()
2291 int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_fwnode_properties()  argument
2311 		if (!v4l2_ctrl_new_std_menu(hdl, ctrl_ops,  in v4l2_ctrl_new_fwnode_properties()
2315 			return hdl->error;  in v4l2_ctrl_new_fwnode_properties()
2319 		if (!v4l2_ctrl_new_std(hdl, ctrl_ops,  in v4l2_ctrl_new_fwnode_properties()
2323 			return hdl->error;  in v4l2_ctrl_new_fwnode_properties()
2326 	return hdl->error;  in v4l2_ctrl_new_fwnode_properties()