tree 979e3f88bf6e507021c28ac3e9236f7d5cc3bfa9
parent 3a9677063f00a61b6067a07df3d7ee12eace79b7
author Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> 1370619911 -0300
committer Mauro Carvalho Chehab <m.chehab@samsung.com> 1376821008 -0300

[media] media: Add support for circular graph traversal

The graph traversal API (media_entity_graph_walk_*) doesn't support
cyclic graphs and will fail to correctly walk a graph when circular
links exist. Support circular graph traversal by checking whether an
entity has already been visited before pushing it to the stack.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>