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authorSakari Ailus <sakari.ailus@iki.fi>2015-12-16 11:32:21 -0200
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2016-01-11 12:19:18 -0200
commit5dd8775dc6b480f67be11108d7cd798fba724cab (patch)
treea98e42430cc8bfd4c1c68ae485b9b8f6f24d6db3 /drivers/media/media-entity.c
parent434257f19ce0a6b635a84882257034ae79d2f274 (diff)
download96b-common-5dd8775dc6b480f67be11108d7cd798fba724cab.tar.gz
[media] media: Move media graph state for streamon/off to the pipeline
The struct media_entity_graph was allocated in the stack, limiting the number of entities that could be reasonably allocated. Instead, move the struct to struct media_pipeline which is typically allocated using kmalloc() instead. The intent is to keep the enumeration around for later use for the duration of the streaming. As streaming is eventually stopped, an unfortunate memory allocation failure would prevent stopping the streaming. As no memory will need to be allocated, the problem is avoided altogether. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/media-entity.c')
-rw-r--r--drivers/media/media-entity.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index 5e3f32f63187..83cfde6dcb1c 100644
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -349,16 +349,16 @@ __must_check int media_entity_pipeline_start(struct media_entity *entity,
struct media_pipeline *pipe)
{
struct media_device *mdev = entity->graph_obj.mdev;
- struct media_entity_graph graph;
+ struct media_entity_graph *graph = &pipe->graph;
struct media_entity *entity_err = entity;
struct media_link *link;
int ret;
mutex_lock(&mdev->graph_mutex);
- media_entity_graph_walk_start(&graph, entity);
+ media_entity_graph_walk_start(graph, entity);
- while ((entity = media_entity_graph_walk_next(&graph))) {
+ while ((entity = media_entity_graph_walk_next(graph))) {
DECLARE_BITMAP(active, MEDIA_ENTITY_MAX_PADS);
DECLARE_BITMAP(has_no_links, MEDIA_ENTITY_MAX_PADS);
@@ -439,9 +439,9 @@ error:
* Link validation on graph failed. We revert what we did and
* return the error.
*/
- media_entity_graph_walk_start(&graph, entity_err);
+ media_entity_graph_walk_start(graph, entity_err);
- while ((entity_err = media_entity_graph_walk_next(&graph))) {
+ while ((entity_err = media_entity_graph_walk_next(graph))) {
entity_err->stream_count--;
if (entity_err->stream_count == 0)
entity_err->pipe = NULL;
@@ -463,13 +463,13 @@ EXPORT_SYMBOL_GPL(media_entity_pipeline_start);
void media_entity_pipeline_stop(struct media_entity *entity)
{
struct media_device *mdev = entity->graph_obj.mdev;
- struct media_entity_graph graph;
+ struct media_entity_graph *graph = &entity->pipe->graph;
mutex_lock(&mdev->graph_mutex);
- media_entity_graph_walk_start(&graph, entity);
+ media_entity_graph_walk_start(graph, entity);
- while ((entity = media_entity_graph_walk_next(&graph))) {
+ while ((entity = media_entity_graph_walk_next(graph))) {
entity->stream_count--;
if (entity->stream_count == 0)
entity->pipe = NULL;