diff options
| -rw-r--r-- | drivers/media/media-entity.c | 17 | ||||
| -rw-r--r-- | include/media/media-entity.h | 4 |
2 files changed, 14 insertions, 7 deletions
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c index 86a8396f6ec2..3cad525c2ac1 100644 --- a/drivers/media/media-entity.c +++ b/drivers/media/media-entity.c @@ -379,10 +379,10 @@ __must_check int media_entity_pipeline_start(struct media_entity *entity, mutex_lock(&mdev->graph_mutex); - ret = media_entity_graph_walk_init(&pipe->graph, mdev); - if (ret) { - mutex_unlock(&mdev->graph_mutex); - return ret; + if (!pipe->streaming_count++) { + ret = media_entity_graph_walk_init(&pipe->graph, mdev); + if (ret) + goto error_graph_walk_start; } media_entity_graph_walk_start(&pipe->graph, entity); @@ -483,7 +483,9 @@ error: break; } - media_entity_graph_walk_cleanup(graph); +error_graph_walk_start: + if (!--pipe->streaming_count) + media_entity_graph_walk_cleanup(graph); mutex_unlock(&mdev->graph_mutex); @@ -495,9 +497,11 @@ void media_entity_pipeline_stop(struct media_entity *entity) { struct media_device *mdev = entity->graph_obj.mdev; struct media_entity_graph *graph = &entity->pipe->graph; + struct media_pipeline *pipe = entity->pipe; mutex_lock(&mdev->graph_mutex); + WARN_ON(!pipe->streaming_count); media_entity_graph_walk_start(graph, entity); while ((entity = media_entity_graph_walk_next(graph))) { @@ -506,7 +510,8 @@ void media_entity_pipeline_stop(struct media_entity *entity) entity->pipe = NULL; } - media_entity_graph_walk_cleanup(graph); + if (!--pipe->streaming_count) + media_entity_graph_walk_cleanup(graph); mutex_unlock(&mdev->graph_mutex); } diff --git a/include/media/media-entity.h b/include/media/media-entity.h index a53acb099c16..a47a7c8a93cf 100644 --- a/include/media/media-entity.h +++ b/include/media/media-entity.h @@ -119,9 +119,11 @@ struct media_entity_graph { /* * struct media_pipeline - Media pipeline related information * - * @graph: Media graph walk during pipeline start / stop + * @streaming_count: Streaming start count - streaming stop count + * @graph: Media graph walk during pipeline start / stop */ struct media_pipeline { + int streaming_count; struct media_entity_graph graph; }; |