diff options
Diffstat (limited to 'drivers/media/video/omap3isp/ispvideo.c')
| -rw-r--r-- | drivers/media/video/omap3isp/ispvideo.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/media/video/omap3isp/ispvideo.c b/drivers/media/video/omap3isp/ispvideo.c index 912ac071b104..0cb8a9f9d675 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); @@ -1050,6 +1056,14 @@ error: if (video->isp->pdata->set_constraints) video->isp->pdata->set_constraints(video->isp, false); media_entity_pipeline_stop(&video->video.entity); + /* The DMA queue must be emptied here, otherwise CCDC interrupts + * that will get triggered the next time the CCDC is powered up + * will try to access buffers that might have been freed but + * still present in the DMA queue. This can easily get triggered + * if the above omap3isp_pipeline_set_stream() call fails on a + * system with a free-running sensor. + */ + INIT_LIST_HEAD(&video->dmaqueue); video->queue = NULL; } |