diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/media-entity.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c index 83cfde6dcb1c..9bf96c71374e 100644 --- a/drivers/media/media-entity.c +++ b/drivers/media/media-entity.c @@ -282,6 +282,33 @@ static struct media_entity *stack_pop(struct media_entity_graph *graph) #define link_top(en) ((en)->stack[(en)->top].link) #define stack_top(en) ((en)->stack[(en)->top].entity) +/** + * media_entity_graph_walk_init - Allocate resources for graph walk + * @graph: Media graph structure that will be used to walk the graph + * @mdev: Media device + * + * Reserve resources for graph walk in media device's current + * state. The memory must be released using + * media_entity_graph_walk_free(). + * + * Returns error on failure, zero on success. + */ +__must_check int media_entity_graph_walk_init( + struct media_entity_graph *graph, struct media_device *mdev) +{ + return 0; +} +EXPORT_SYMBOL_GPL(media_entity_graph_walk_init); + +/** + * media_entity_graph_walk_cleanup - Release resources related to graph walking + * @graph: Media graph structure that was used to walk the graph + */ +void media_entity_graph_walk_cleanup(struct media_entity_graph *graph) +{ +} +EXPORT_SYMBOL_GPL(media_entity_graph_walk_cleanup); + void media_entity_graph_walk_start(struct media_entity_graph *graph, struct media_entity *entity) { |