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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2011-07-31 17:12:02 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-09-11 14:49:27 +0200 |
| commit | 00542edf071e249ccb541ffb2d2b9034e2533968 (patch) | |
| tree | 4fcde884ee297fa8fa1768ee28bd7927bb7ce610 /drivers/media/video/omap3isp/ispvideo.c | |
| parent | [media] gspca - main: Better values for V4L2_FMT_FLAG_COMPRESSED (diff) | |
| download | linux-00542edf071e249ccb541ffb2d2b9034e2533968.tar.xz linux-00542edf071e249ccb541ffb2d2b9034e2533968.zip | |
[media] omap3isp: Don't accept pipelines with no video source as valid
Make sure the pipeline has a valid video source (either a subdev with no
sink pad, or a non-subdev entity) at stream-on time and return -EPIPE if
no video source can be found.
Reported-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/media/video/omap3isp/ispvideo.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/media/video/omap3isp/ispvideo.c b/drivers/media/video/omap3isp/ispvideo.c index fd965adfd597..fd94cdf471bc 100644 --- a/drivers/media/video/omap3isp/ispvideo.c +++ b/drivers/media/video/omap3isp/ispvideo.c @@ -278,7 +278,8 @@ isp_video_far_end(struct isp_video *video) * limits reported by every block in the pipeline. * * Return 0 if all formats match, or -EPIPE if at least one link is found with - * different formats on its two ends. + * different formats on its two ends or if the pipeline doesn't start with a + * video source (either a subdev with no input pad, or a non-subdev entity). */ static int isp_video_validate_pipeline(struct isp_pipeline *pipe) { @@ -329,10 +330,15 @@ static int isp_video_validate_pipeline(struct isp_pipeline *pipe) * in the middle of it. */ shifter_link = subdev == &isp->isp_ccdc.subdev; - /* Retrieve the source format */ + /* Retrieve the source format. Return an error if no source + * entity can be found, and stop checking the pipeline if the + * source entity isn't a subdev. + */ pad = media_entity_remote_source(pad); - if (pad == NULL || - media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) + if (pad == NULL) + return -EPIPE; + + if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) break; subdev = media_entity_to_v4l2_subdev(pad->entity); |