From 7a6f0b22706e2314dbba91f53d20502050aec1d2 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Fri, 11 Mar 2011 11:34:35 -0300 Subject: [media] media: Properly handle link flags in link setup, link notify callback The link flags were not properly handled in __media_entity_setup_link which could lead to link_notify callback to be called when the flags are not modified. Fix this. Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- drivers/media/media-entity.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c index 23640ed44d8..056138f63c7 100644 --- a/drivers/media/media-entity.c +++ b/drivers/media/media-entity.c @@ -378,7 +378,6 @@ EXPORT_SYMBOL_GPL(media_entity_create_link); static int __media_entity_setup_link_notify(struct media_link *link, u32 flags) { - const u32 mask = MEDIA_LNK_FL_ENABLED; int ret; /* Notify both entities. */ @@ -395,7 +394,7 @@ static int __media_entity_setup_link_notify(struct media_link *link, u32 flags) return ret; } - link->flags = (link->flags & ~mask) | (flags & mask); + link->flags = flags; link->reverse->flags = link->flags; return 0; @@ -417,6 +416,7 @@ static int __media_entity_setup_link_notify(struct media_link *link, u32 flags) */ int __media_entity_setup_link(struct media_link *link, u32 flags) { + const u32 mask = MEDIA_LNK_FL_ENABLED; struct media_device *mdev; struct media_entity *source, *sink; int ret = -EBUSY; @@ -424,6 +424,10 @@ int __media_entity_setup_link(struct media_link *link, u32 flags) if (link == NULL) return -EINVAL; + /* The non-modifiable link flags must not be modified. */ + if ((link->flags & ~mask) != (flags & ~mask)) + return -EINVAL; + if (link->flags & MEDIA_LNK_FL_IMMUTABLE) return link->flags == flags ? 0 : -EINVAL; -- cgit v1.2.3