1524 static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)  in handler_set_err()  argument
1526 	if (hdl->error == 0)  in handler_set_err()
1527 		hdl->error = err;  in handler_set_err()
1532 int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_handler_init_class()  argument
1536 	mutex_init(&hdl->_lock);  in v4l2_ctrl_handler_init_class()
1537 	hdl->lock = &hdl->_lock;  in v4l2_ctrl_handler_init_class()
1538 	lockdep_set_class_and_name(hdl->lock, key, name);  in v4l2_ctrl_handler_init_class()
1539 	INIT_LIST_HEAD(&hdl->ctrls);  in v4l2_ctrl_handler_init_class()
1540 	INIT_LIST_HEAD(&hdl->ctrl_refs);  in v4l2_ctrl_handler_init_class()
1541 	hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;  in v4l2_ctrl_handler_init_class()
1542 	hdl->buckets = kvcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),  in v4l2_ctrl_handler_init_class()
1544 	hdl->error = hdl->buckets ? 0 : -ENOMEM;  in v4l2_ctrl_handler_init_class()
1545 	v4l2_ctrl_handler_init_request(hdl);  in v4l2_ctrl_handler_init_class()
1546 	return hdl->error;  in v4l2_ctrl_handler_init_class()
1551 void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)  in v4l2_ctrl_handler_free()  argument
1557 	if (hdl == NULL || hdl->buckets == NULL)  in v4l2_ctrl_handler_free()
1560 	v4l2_ctrl_handler_free_request(hdl);  in v4l2_ctrl_handler_free()
1562 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_free()
1564 	list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {  in v4l2_ctrl_handler_free()
1571 	list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {  in v4l2_ctrl_handler_free()
1578 	kvfree(hdl->buckets);  in v4l2_ctrl_handler_free()
1579 	hdl->buckets = NULL;  in v4l2_ctrl_handler_free()
1580 	hdl->cached = NULL;  in v4l2_ctrl_handler_free()
1581 	hdl->error = 0;  in v4l2_ctrl_handler_free()
1582 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_free()
1583 	mutex_destroy(&hdl->_lock);  in v4l2_ctrl_handler_free()
1594 		struct v4l2_ctrl_handler *hdl, u32 id)  in find_private_ref()  argument
1599 	list_for_each_entry(ref, &hdl->ctrl_refs, node) {  in find_private_ref()
1615 struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)  in find_ref()  argument
1624 		return find_private_ref(hdl, id);  in find_ref()
1625 	bucket = id % hdl->nr_of_buckets;  in find_ref()
1628 	if (hdl->cached && hdl->cached->ctrl->id == id)  in find_ref()
1629 		return hdl->cached;  in find_ref()
1632 	ref = hdl->buckets ? hdl->buckets[bucket] : NULL;  in find_ref()
1637 		hdl->cached = ref; /* cache it! */  in find_ref()
1642 struct v4l2_ctrl_ref *find_ref_lock(struct v4l2_ctrl_handler *hdl, u32 id)  in find_ref_lock()  argument
1646 	if (hdl) {  in find_ref_lock()
1647 		mutex_lock(hdl->lock);  in find_ref_lock()
1648 		ref = find_ref(hdl, id);  in find_ref_lock()
1649 		mutex_unlock(hdl->lock);  in find_ref_lock()
1655 struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)  in v4l2_ctrl_find()  argument
1657 	struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);  in v4l2_ctrl_find()
1664 int handler_new_ref(struct v4l2_ctrl_handler *hdl,  in handler_new_ref()  argument
1673 	int bucket = id % hdl->nr_of_buckets;	/* which bucket to use */  in handler_new_ref()
1684 	    id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)  in handler_new_ref()
1685 		if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))  in handler_new_ref()
1686 			return hdl->error;  in handler_new_ref()
1688 	if (hdl->error)  in handler_new_ref()
1689 		return hdl->error;  in handler_new_ref()
1695 		return handler_set_err(hdl, -ENOMEM);  in handler_new_ref()
1703 	mutex_lock(hdl->lock);  in handler_new_ref()
1709 	if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {  in handler_new_ref()
1710 		list_add_tail(&new_ref->node, &hdl->ctrl_refs);  in handler_new_ref()
1715 	list_for_each_entry(ref, &hdl->ctrl_refs, node) {  in handler_new_ref()
1729 	new_ref->next = hdl->buckets[bucket];  in handler_new_ref()
1730 	hdl->buckets[bucket] = new_ref;  in handler_new_ref()
1733 	if (ctrl->handler == hdl) {  in handler_new_ref()
1744 	mutex_unlock(hdl->lock);  in handler_new_ref()
1749 static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new()  argument
1768 	if (hdl->error)  in v4l2_ctrl_new()
1882 		handler_set_err(hdl, -ERANGE);  in v4l2_ctrl_new()
1887 		handler_set_err(hdl, err);  in v4l2_ctrl_new()
1893 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new()
1904 			handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new()
1929 		handler_set_err(hdl, -ENOMEM);  in v4l2_ctrl_new()
1935 	ctrl->handler = hdl;  in v4l2_ctrl_new()
1994 	if (handler_new_ref(hdl, ctrl, NULL, false, false)) {  in v4l2_ctrl_new()
1999 	mutex_lock(hdl->lock);  in v4l2_ctrl_new()
2000 	list_add_tail(&ctrl->node, &hdl->ctrls);  in v4l2_ctrl_new()
2001 	mutex_unlock(hdl->lock);  in v4l2_ctrl_new()
2005 struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_custom()  argument
2033 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_custom()
2037 	ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,  in v4l2_ctrl_new_custom()
2049 struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std()  argument
2061 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std()
2064 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std()
2071 struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std_menu()  argument
2094 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu()
2097 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std_menu()
2104 struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std_menu_items()  argument
2120 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu_items()
2126 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu_items()
2129 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std_menu_items()
2137 struct v4l2_ctrl *v4l2_ctrl_new_std_compound(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std_compound()  argument
2148 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_compound()
2151 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std_compound()
2158 struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_int_menu()  argument
2172 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_int_menu()
2175 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_int_menu()
2182 int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_add_handler()  argument
2191 	if (!hdl || !add || hdl == add)  in v4l2_ctrl_add_handler()
2193 	if (hdl->error)  in v4l2_ctrl_add_handler()
2194 		return hdl->error;  in v4l2_ctrl_add_handler()
2208 		ret = handler_new_ref(hdl, ctrl, NULL, from_other_dev, false);  in v4l2_ctrl_add_handler()
2451 int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)  in __v4l2_ctrl_handler_setup()  argument
2456 	if (hdl == NULL)  in __v4l2_ctrl_handler_setup()
2459 	lockdep_assert_held(hdl->lock);  in __v4l2_ctrl_handler_setup()
2461 	list_for_each_entry(ctrl, &hdl->ctrls, node)  in __v4l2_ctrl_handler_setup()
2464 	list_for_each_entry(ctrl, &hdl->ctrls, node) {  in __v4l2_ctrl_handler_setup()
2490 int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)  in v4l2_ctrl_handler_setup()  argument
2494 	if (hdl == NULL)  in v4l2_ctrl_handler_setup()
2497 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_setup()
2498 	ret = __v4l2_ctrl_handler_setup(hdl);  in v4l2_ctrl_handler_setup()
2499 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_setup()
2532 void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_handler_log_status()  argument
2539 	if (!hdl)  in v4l2_ctrl_handler_log_status()
2546 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_log_status()
2547 	list_for_each_entry(ctrl, &hdl->ctrls, node)  in v4l2_ctrl_handler_log_status()
2550 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_log_status()
2554 int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_fwnode_properties()  argument
2574 		if (!v4l2_ctrl_new_std_menu(hdl, ctrl_ops,  in v4l2_ctrl_new_fwnode_properties()
2578 			return hdl->error;  in v4l2_ctrl_new_fwnode_properties()
2582 		if (!v4l2_ctrl_new_std(hdl, ctrl_ops,  in v4l2_ctrl_new_fwnode_properties()
2586 			return hdl->error;  in v4l2_ctrl_new_fwnode_properties()
2589 	return hdl->error;  in v4l2_ctrl_new_fwnode_properties()