103 static void stack_push(struct media_entity_graph *graph,  in stack_push()  argument
106 	if (graph->top == MEDIA_ENTITY_ENUM_MAX_DEPTH - 1) {  in stack_push()
110 	graph->top++;  in stack_push()
111 	graph->stack[graph->top].link = 0;  in stack_push()
112 	graph->stack[graph->top].entity = entity;  in stack_push()
115 static struct media_entity *stack_pop(struct media_entity_graph *graph)  in stack_pop()  argument
119 	entity = graph->stack[graph->top].entity;  in stack_pop()
120 	graph->top--;  in stack_pop()
138 void media_entity_graph_walk_start(struct media_entity_graph *graph,  in media_entity_graph_walk_start()  argument
141 	graph->top = 0;  in media_entity_graph_walk_start()
142 	graph->stack[graph->top].entity = NULL;  in media_entity_graph_walk_start()
143 	bitmap_zero(graph->entities, MEDIA_ENTITY_ENUM_MAX_ID);  in media_entity_graph_walk_start()
148 	__set_bit(entity->id, graph->entities);  in media_entity_graph_walk_start()
149 	stack_push(graph, entity);  in media_entity_graph_walk_start()
166 media_entity_graph_walk_next(struct media_entity_graph *graph)  in media_entity_graph_walk_next()  argument
168 	if (stack_top(graph) == NULL)  in media_entity_graph_walk_next()
176 	while (link_top(graph) < stack_top(graph)->num_links) {  in media_entity_graph_walk_next()
177 		struct media_entity *entity = stack_top(graph);  in media_entity_graph_walk_next()
178 		struct media_link *link = &entity->links[link_top(graph)];  in media_entity_graph_walk_next()
183 			link_top(graph)++;  in media_entity_graph_walk_next()
193 		if (__test_and_set_bit(next->id, graph->entities)) {  in media_entity_graph_walk_next()
194 			link_top(graph)++;  in media_entity_graph_walk_next()
199 		link_top(graph)++;  in media_entity_graph_walk_next()
200 		stack_push(graph, next);  in media_entity_graph_walk_next()
203 	return stack_pop(graph);  in media_entity_graph_walk_next()
229 	struct media_entity_graph graph;  in media_entity_pipeline_start()  local
235 	media_entity_graph_walk_start(&graph, entity);  in media_entity_pipeline_start()
237 	while ((entity = media_entity_graph_walk_next(&graph))) {  in media_entity_pipeline_start()
315 	media_entity_graph_walk_start(&graph, entity_err);  in media_entity_pipeline_start()
317 	while ((entity_err = media_entity_graph_walk_next(&graph))) {  in media_entity_pipeline_start()
351 	struct media_entity_graph graph;  in media_entity_pipeline_stop()  local
355 	media_entity_graph_walk_start(&graph, entity);  in media_entity_pipeline_stop()
357 	while ((entity = media_entity_graph_walk_next(&graph))) {  in media_entity_pipeline_stop()