1707 static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)  in handler_set_err()  argument
1709 	if (hdl->error == 0)  in handler_set_err()
1710 		hdl->error = err;  in handler_set_err()
1715 int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_handler_init_class()  argument
1719 	hdl->lock = &hdl->_lock;  in v4l2_ctrl_handler_init_class()
1720 	mutex_init(hdl->lock);  in v4l2_ctrl_handler_init_class()
1721 	lockdep_set_class_and_name(hdl->lock, key, name);  in v4l2_ctrl_handler_init_class()
1722 	INIT_LIST_HEAD(&hdl->ctrls);  in v4l2_ctrl_handler_init_class()
1723 	INIT_LIST_HEAD(&hdl->ctrl_refs);  in v4l2_ctrl_handler_init_class()
1724 	hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;  in v4l2_ctrl_handler_init_class()
1725 	hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),  in v4l2_ctrl_handler_init_class()
1727 	hdl->error = hdl->buckets ? 0 : -ENOMEM;  in v4l2_ctrl_handler_init_class()
1728 	return hdl->error;  in v4l2_ctrl_handler_init_class()
1733 void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)  in v4l2_ctrl_handler_free()  argument
1739 	if (hdl == NULL || hdl->buckets == NULL)  in v4l2_ctrl_handler_free()
1742 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_free()
1744 	list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {  in v4l2_ctrl_handler_free()
1749 	list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {  in v4l2_ctrl_handler_free()
1755 	kfree(hdl->buckets);  in v4l2_ctrl_handler_free()
1756 	hdl->buckets = NULL;  in v4l2_ctrl_handler_free()
1757 	hdl->cached = NULL;  in v4l2_ctrl_handler_free()
1758 	hdl->error = 0;  in v4l2_ctrl_handler_free()
1759 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_free()
1770 		struct v4l2_ctrl_handler *hdl, u32 id)  in find_private_ref()  argument
1775 	list_for_each_entry(ref, &hdl->ctrl_refs, node) {  in find_private_ref()
1791 static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)  in find_ref()  argument
1800 		return find_private_ref(hdl, id);  in find_ref()
1801 	bucket = id % hdl->nr_of_buckets;  in find_ref()
1804 	if (hdl->cached && hdl->cached->ctrl->id == id)  in find_ref()
1805 		return hdl->cached;  in find_ref()
1808 	ref = hdl->buckets ? hdl->buckets[bucket] : NULL;  in find_ref()
1813 		hdl->cached = ref; /* cache it! */  in find_ref()
1819 		struct v4l2_ctrl_handler *hdl, u32 id)  in find_ref_lock()  argument
1823 	if (hdl) {  in find_ref_lock()
1824 		mutex_lock(hdl->lock);  in find_ref_lock()
1825 		ref = find_ref(hdl, id);  in find_ref_lock()
1826 		mutex_unlock(hdl->lock);  in find_ref_lock()
1832 struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)  in v4l2_ctrl_find()  argument
1834 	struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);  in v4l2_ctrl_find()
1841 static int handler_new_ref(struct v4l2_ctrl_handler *hdl,  in handler_new_ref()  argument
1848 	int bucket = id % hdl->nr_of_buckets;	/* which bucket to use */  in handler_new_ref()
1855 	    id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)  in handler_new_ref()
1856 		if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))  in handler_new_ref()
1857 			return hdl->error;  in handler_new_ref()
1859 	if (hdl->error)  in handler_new_ref()
1860 		return hdl->error;  in handler_new_ref()
1864 		return handler_set_err(hdl, -ENOMEM);  in handler_new_ref()
1866 	if (ctrl->handler == hdl) {  in handler_new_ref()
1877 	mutex_lock(hdl->lock);  in handler_new_ref()
1883 	if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {  in handler_new_ref()
1884 		list_add_tail(&new_ref->node, &hdl->ctrl_refs);  in handler_new_ref()
1889 	list_for_each_entry(ref, &hdl->ctrl_refs, node) {  in handler_new_ref()
1903 	new_ref->next = hdl->buckets[bucket];  in handler_new_ref()
1904 	hdl->buckets[bucket] = new_ref;  in handler_new_ref()
1907 	mutex_unlock(hdl->lock);  in handler_new_ref()
1912 static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new()  argument
1931 	if (hdl->error)  in v4l2_ctrl_new()
1971 		handler_set_err(hdl, -ERANGE);  in v4l2_ctrl_new()
1976 		handler_set_err(hdl, err);  in v4l2_ctrl_new()
1980 		handler_set_err(hdl, -ERANGE);  in v4l2_ctrl_new()
1986 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new()
2004 		handler_set_err(hdl, -ENOMEM);  in v4l2_ctrl_new()
2010 	ctrl->handler = hdl;  in v4l2_ctrl_new()
2050 	if (handler_new_ref(hdl, ctrl)) {  in v4l2_ctrl_new()
2054 	mutex_lock(hdl->lock);  in v4l2_ctrl_new()
2055 	list_add_tail(&ctrl->node, &hdl->ctrls);  in v4l2_ctrl_new()
2056 	mutex_unlock(hdl->lock);  in v4l2_ctrl_new()
2060 struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_custom()  argument
2089 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_custom()
2093 	ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,  in v4l2_ctrl_new_custom()
2105 struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std()  argument
2117 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std()
2120 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std()
2127 struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std_menu()  argument
2150 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu()
2153 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std_menu()
2160 struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_std_menu_items()  argument
2176 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu_items()
2182 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_std_menu_items()
2185 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_std_menu_items()
2193 struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_new_int_menu()  argument
2207 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_new_int_menu()
2210 	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,  in v4l2_ctrl_new_int_menu()
2217 struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_add_ctrl()  argument
2220 	if (hdl == NULL || hdl->error)  in v4l2_ctrl_add_ctrl()
2223 		handler_set_err(hdl, -EINVAL);  in v4l2_ctrl_add_ctrl()
2226 	if (ctrl->handler == hdl)  in v4l2_ctrl_add_ctrl()
2228 	return handler_new_ref(hdl, ctrl) ? NULL : ctrl;  in v4l2_ctrl_add_ctrl()
2233 int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_add_handler()  argument
2241 	if (!hdl || !add || hdl == add)  in v4l2_ctrl_add_handler()
2243 	if (hdl->error)  in v4l2_ctrl_add_handler()
2244 		return hdl->error;  in v4l2_ctrl_add_handler()
2258 		ret = handler_new_ref(hdl, ctrl);  in v4l2_ctrl_add_handler()
2410 void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,  in v4l2_ctrl_handler_log_status()  argument
2417 	if (hdl == NULL)  in v4l2_ctrl_handler_log_status()
2424 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_log_status()
2425 	list_for_each_entry(ctrl, &hdl->ctrls, node)  in v4l2_ctrl_handler_log_status()
2428 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_log_status()
2440 int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)  in v4l2_ctrl_handler_setup()  argument
2445 	if (hdl == NULL)  in v4l2_ctrl_handler_setup()
2447 	mutex_lock(hdl->lock);  in v4l2_ctrl_handler_setup()
2448 	list_for_each_entry(ctrl, &hdl->ctrls, node)  in v4l2_ctrl_handler_setup()
2451 	list_for_each_entry(ctrl, &hdl->ctrls, node) {  in v4l2_ctrl_handler_setup()
2472 	mutex_unlock(hdl->lock);  in v4l2_ctrl_handler_setup()
2478 int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)  in v4l2_query_ext_ctrl()  argument
2485 	if (hdl == NULL)  in v4l2_query_ext_ctrl()
2488 	mutex_lock(hdl->lock);  in v4l2_query_ext_ctrl()
2491 	ref = find_ref(hdl, id);  in v4l2_query_ext_ctrl()
2493 	if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {  in v4l2_query_ext_ctrl()
2510 		if (id >= node2id(hdl->ctrl_refs.prev)) {  in v4l2_query_ext_ctrl()
2515 			list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {  in v4l2_query_ext_ctrl()
2522 			if (&ref->node == &hdl->ctrl_refs)  in v4l2_query_ext_ctrl()
2529 			list_for_each_entry(ref, &hdl->ctrl_refs, node) {  in v4l2_query_ext_ctrl()
2536 			if (&ref->node == &hdl->ctrl_refs)  in v4l2_query_ext_ctrl()
2540 	mutex_unlock(hdl->lock);  in v4l2_query_ext_ctrl()
2573 int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)  in v4l2_queryctrl()  argument
2578 	rc = v4l2_query_ext_ctrl(hdl, &qec);  in v4l2_queryctrl()
2618 int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)  in v4l2_querymenu()  argument
2623 	ctrl = v4l2_ctrl_find(hdl, qm->id);  in v4l2_querymenu()
2709 static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,  in prepare_ext_ctrls()  argument
2733 		ref = find_ref_lock(hdl, id);  in prepare_ext_ctrls()
2743 			ref = find_ref_lock(hdl, ctrl->cluster[0]->id);  in prepare_ext_ctrls()
2774 	mutex_lock(hdl->lock);  in prepare_ext_ctrls()
2796 	mutex_unlock(hdl->lock);  in prepare_ext_ctrls()
2803 static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class)  in class_check()  argument
2806 		return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;  in class_check()
2807 	return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;  in class_check()
2813 int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)  in v4l2_g_ext_ctrls()  argument
2823 	if (hdl == NULL)  in v4l2_g_ext_ctrls()
2827 		return class_check(hdl, cs->ctrl_class);  in v4l2_g_ext_ctrls()
2836 	ret = prepare_ext_ctrls(hdl, cs, helpers, true);  in v4l2_g_ext_ctrls()
2922 int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)  in v4l2_g_ctrl()  argument
2924 	struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);  in v4l2_g_ctrl()
3070 static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,  in try_set_ext_ctrls()  argument
3082 	if (hdl == NULL)  in try_set_ext_ctrls()
3086 		return class_check(hdl, cs->ctrl_class);  in try_set_ext_ctrls()
3094 	ret = prepare_ext_ctrls(hdl, cs, helpers, false);  in try_set_ext_ctrls()
3171 int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)  in v4l2_try_ext_ctrls()  argument
3173 	return try_set_ext_ctrls(NULL, hdl, cs, false);  in v4l2_try_ext_ctrls()
3177 int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,  in v4l2_s_ext_ctrls()  argument
3180 	return try_set_ext_ctrls(fh, hdl, cs, true);  in v4l2_s_ext_ctrls()
3238 int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,  in v4l2_s_ctrl()  argument
3241 	struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);  in v4l2_s_ctrl()