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[media] media-device: supress backlinks at G_TOPOLOGY ioctl

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Due to the graph traversal algorithm currently in usage, we
need a copy of all data links. Those backlinks should not be
send to userspace, as otherwise, all links there will be
duplicated.

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Mauro Carvalho Chehab
2015-08-30 09:53:57 -03:00
parent 28b6ba1106
commit 39d1ebc609
3 changed files with 6 additions and 0 deletions
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2
include/media/media-entity.h
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@@ -96,6 +96,7 @@ struct media_pipeline {
* @reverse: Pointer to the link for the reverse direction of a pad to pad
* link.
* @flags: Link flags, as defined in uapi/media.h (MEDIA_LNK_FL_*)
* @is_backlink: Indicate if the link is a backlink.
*/
struct media_link {
struct media_gobj graph_obj;
@@ -112,6 +113,7 @@ struct media_link {
};
struct media_link *reverse;
unsigned long flags;
bool is_backlink;
};
/**