1694 static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)  in handler_set_err()  argument
1696 	if (hdl->error == 0)  in handler_set_err()
1697 		hdl->error = err;  in handler_set_err()
1702 int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_handler_init_class()  argument
1706 	hdl->lock = &hdl->_lock;  in v4l2_ctrl_handler_init_class()
1707 	mutex_init(hdl->lock);  in v4l2_ctrl_handler_init_class()
1708 	lockdep_set_class_and_name(hdl->lock, key, name);  in v4l2_ctrl_handler_init_class()
1709 	INIT_LIST_HEAD(&hdl->ctrls);  in v4l2_ctrl_handler_init_class()
1710 	INIT_LIST_HEAD(&hdl->ctrl_refs);  in v4l2_ctrl_handler_init_class()
1711 	hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;  in v4l2_ctrl_handler_init_class()
1712 	hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),  in v4l2_ctrl_handler_init_class()
1714 	hdl->error = hdl->buckets ? 0 : -ENOMEM;  in v4l2_ctrl_handler_init_class()
1715 	return hdl->error;  in v4l2_ctrl_handler_init_class()
1720 void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)  in v4l2_ctrl_handler_free()  argument
1726 	if (hdl == NULL || hdl->buckets == NULL)  in v4l2_ctrl_handler_free()
1729 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_free()
1731 	list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {  in v4l2_ctrl_handler_free()
1736 	list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {  in v4l2_ctrl_handler_free()
1742 	kfree(hdl->buckets);  in v4l2_ctrl_handler_free()
1743 	hdl->buckets = NULL;  in v4l2_ctrl_handler_free()
1744 	hdl->cached = NULL;  in v4l2_ctrl_handler_free()
1745 	hdl->error = 0;  in v4l2_ctrl_handler_free()
1746 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_free()
1757 		struct v4l2_ctrl_handler *hdl, u32 id)  in find_private_ref()  argument
1762 	list_for_each_entry(ref, &hdl->ctrl_refs, node) {  in find_private_ref()
1778 static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)  in find_ref()  argument
1787 		return find_private_ref(hdl, id);  in find_ref()
1788 	bucket = id % hdl->nr_of_buckets;  in find_ref()
1791 	if (hdl->cached && hdl->cached->ctrl->id == id)  in find_ref()
1792 		return hdl->cached;  in find_ref()
1795 	ref = hdl->buckets ? hdl->buckets[bucket] : NULL;  in find_ref()
1800 		hdl->cached = ref; /* cache it! */  in find_ref()
1806 		struct v4l2_ctrl_handler *hdl, u32 id)  in find_ref_lock()  argument
1810 	if (hdl) {  in find_ref_lock()
1811 		mutex_lock(hdl->lock);  in find_ref_lock()
1812 		ref = find_ref(hdl, id);  in find_ref_lock()
1813 		mutex_unlock(hdl->lock);  in find_ref_lock()
1819 struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)  in v4l2_ctrl_find()  argument
1821 	struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);  in v4l2_ctrl_find()
1828 static int handler_new_ref(struct v4l2_ctrl_handler *hdl,  in handler_new_ref()  argument
1835 	int bucket = id % hdl->nr_of_buckets;	/* which bucket to use */  in handler_new_ref()
1842 	    id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)  in handler_new_ref()
1843 		if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))  in handler_new_ref()
1844 			return hdl->error;  in handler_new_ref()
1846 	if (hdl->error)  in handler_new_ref()
1847 		return hdl->error;  in handler_new_ref()
1851 		return handler_set_err(hdl, -ENOMEM);  in handler_new_ref()
1853 	if (ctrl->handler == hdl) {  in handler_new_ref()
1864 	mutex_lock(hdl->lock);  in handler_new_ref()
1870 	if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {  in handler_new_ref()
1871 		list_add_tail(&new_ref->node, &hdl->ctrl_refs);  in handler_new_ref()
1876 	list_for_each_entry(ref, &hdl->ctrl_refs, node) {  in handler_new_ref()
1890 	new_ref->next = hdl->buckets[bucket];  in handler_new_ref()
1891 	hdl->buckets[bucket] = new_ref;  in handler_new_ref()
1894 	mutex_unlock(hdl->lock);  in handler_new_ref()
1899 static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new()  argument
1918 	if (hdl->error)  in v4l2_ctrl_new()
1958 		handler_set_err(hdl, -ERANGE);  in v4l2_ctrl_new()
1963 		handler_set_err(hdl, err);  in v4l2_ctrl_new()
1967 		handler_set_err(hdl, -ERANGE);  in v4l2_ctrl_new()
1973 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new()
1991 		handler_set_err(hdl, -ENOMEM);  in v4l2_ctrl_new()
1997 	ctrl->handler = hdl;  in v4l2_ctrl_new()
2037 	if (handler_new_ref(hdl, ctrl)) {  in v4l2_ctrl_new()
2041 	mutex_lock(hdl->lock);  in v4l2_ctrl_new()
2042 	list_add_tail(&ctrl->node, &hdl->ctrls);  in v4l2_ctrl_new()
2043 	mutex_unlock(hdl->lock);  in v4l2_ctrl_new()
2047 struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_custom()  argument
2076 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_custom()
2080 	ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,  in v4l2_ctrl_new_custom()
2092 struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std()  argument
2104 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std()
2107 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std()
2114 struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std_menu()  argument
2137 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu()
2140 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std_menu()
2147 struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std_menu_items()  argument
2163 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu_items()
2169 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu_items()
2172 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std_menu_items()
2180 struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_int_menu()  argument
2194 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_int_menu()
2197 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_int_menu()
2204 struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_add_ctrl()  argument
2207 	if (hdl == NULL || hdl->error)  in v4l2_ctrl_add_ctrl()
2210 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_add_ctrl()
2213 	if (ctrl->handler == hdl)  in v4l2_ctrl_add_ctrl()
2215 	return handler_new_ref(hdl, ctrl) ? NULL : ctrl;  in v4l2_ctrl_add_ctrl()
2220 int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_add_handler()  argument
2228 	if (!hdl || !add || hdl == add)  in v4l2_ctrl_add_handler()
2230 	if (hdl->error)  in v4l2_ctrl_add_handler()
2231 		return hdl->error;  in v4l2_ctrl_add_handler()
2245 		ret = handler_new_ref(hdl, ctrl);  in v4l2_ctrl_add_handler()
2397 void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_handler_log_status()  argument
2404 	if (hdl == NULL)  in v4l2_ctrl_handler_log_status()
2411 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_log_status()
2412 	list_for_each_entry(ctrl, &hdl->ctrls, node)  in v4l2_ctrl_handler_log_status()
2415 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_log_status()
2427 int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)  in v4l2_ctrl_handler_setup()  argument
2432 	if (hdl == NULL)  in v4l2_ctrl_handler_setup()
2434 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_setup()
2435 	list_for_each_entry(ctrl, &hdl->ctrls, node)  in v4l2_ctrl_handler_setup()
2438 	list_for_each_entry(ctrl, &hdl->ctrls, node) {  in v4l2_ctrl_handler_setup()
2459 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_setup()
2465 int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)  in v4l2_query_ext_ctrl()  argument
2472 	if (hdl == NULL)  in v4l2_query_ext_ctrl()
2475 	mutex_lock(hdl->lock);  in v4l2_query_ext_ctrl()
2478 	ref = find_ref(hdl, id);  in v4l2_query_ext_ctrl()
2480 	if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {  in v4l2_query_ext_ctrl()
2497 		if (id >= node2id(hdl->ctrl_refs.prev)) {  in v4l2_query_ext_ctrl()
2502 			list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {  in v4l2_query_ext_ctrl()
2509 			if (&ref->node == &hdl->ctrl_refs)  in v4l2_query_ext_ctrl()
2516 			list_for_each_entry(ref, &hdl->ctrl_refs, node) {  in v4l2_query_ext_ctrl()
2523 			if (&ref->node == &hdl->ctrl_refs)  in v4l2_query_ext_ctrl()
2527 	mutex_unlock(hdl->lock);  in v4l2_query_ext_ctrl()
2560 int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)  in v4l2_queryctrl()  argument
2565 	rc = v4l2_query_ext_ctrl(hdl, &qec);  in v4l2_queryctrl()
2605 int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)  in v4l2_querymenu()  argument
2610 	ctrl = v4l2_ctrl_find(hdl, qm->id);  in v4l2_querymenu()
2696 static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,  in prepare_ext_ctrls()  argument
2720 		ref = find_ref_lock(hdl, id);  in prepare_ext_ctrls()
2730 			ref = find_ref_lock(hdl, ctrl->cluster[0]->id);  in prepare_ext_ctrls()
2761 	mutex_lock(hdl->lock);  in prepare_ext_ctrls()
2783 	mutex_unlock(hdl->lock);  in prepare_ext_ctrls()
2790 static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class)  in class_check()  argument
2793 		return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;  in class_check()
2794 	return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;  in class_check()
2800 int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)  in v4l2_g_ext_ctrls()  argument
2810 	if (hdl == NULL)  in v4l2_g_ext_ctrls()
2814 		return class_check(hdl, cs->ctrl_class);  in v4l2_g_ext_ctrls()
2823 	ret = prepare_ext_ctrls(hdl, cs, helpers, true);  in v4l2_g_ext_ctrls()
2909 int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)  in v4l2_g_ctrl()  argument
2911 	struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);  in v4l2_g_ctrl()
3057 static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,  in try_set_ext_ctrls()  argument
3069 	if (hdl == NULL)  in try_set_ext_ctrls()
3073 		return class_check(hdl, cs->ctrl_class);  in try_set_ext_ctrls()
3081 	ret = prepare_ext_ctrls(hdl, cs, helpers, false);  in try_set_ext_ctrls()
3158 int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)  in v4l2_try_ext_ctrls()  argument
3160 	return try_set_ext_ctrls(NULL, hdl, cs, false);  in v4l2_try_ext_ctrls()
3164 int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,  in v4l2_s_ext_ctrls()  argument
3167 	return try_set_ext_ctrls(fh, hdl, cs, true);  in v4l2_s_ext_ctrls()
3225 int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,  in v4l2_s_ctrl()  argument
3228 	struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);  in v4l2_s_ctrl()