[media] uvcvideo: Fix crash when linking entities
authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Tue, 6 Sep 2011 22:16:18 +0000 (19:16 -0300)
committerMauro Carvalho Chehab <mchehab@redhat.com>
Thu, 22 Sep 2011 01:18:07 +0000 (22:18 -0300)
The uvc_mc_register_entity() function wrongfully selects the
media_entity associated with a UVC entity when creating links. This
results in access to uninitialized media_entity structures and can hit a
BUG_ON statement in media_entity_create_link(). Fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
drivers/media/video/uvc/uvc_entity.c

index 48fea37..29e2399 100644 (file)
@@ -49,7 +49,7 @@ static int uvc_mc_register_entity(struct uvc_video_chain *chain,
                if (remote == NULL)
                        return -EINVAL;
 
-               source = (UVC_ENTITY_TYPE(remote) != UVC_TT_STREAMING)
+               source = (UVC_ENTITY_TYPE(remote) == UVC_TT_STREAMING)
                       ? (remote->vdev ? &remote->vdev->entity : NULL)
                       : &remote->subdev.entity;
                if (source == NULL)