[PATCH v3 22/33] omap3isp: Assume media_entity_pipeline_start may fail

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Since media_entity_pipeline_start() now does link validation, it may
actually fail. Perform the error handling.

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxx>
---
 drivers/media/video/omap3isp/ispvideo.c |   20 ++++++++++++--------
 1 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/media/video/omap3isp/ispvideo.c b/drivers/media/video/omap3isp/ispvideo.c
index c191f13..17522db 100644
--- a/drivers/media/video/omap3isp/ispvideo.c
+++ b/drivers/media/video/omap3isp/ispvideo.c
@@ -993,14 +993,16 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 	 */
 	pipe = video->video.entity.pipe
 	     ? to_isp_pipeline(&video->video.entity) : &video->pipe;
-	media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
+	ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
+	if (ret < 0)
+		goto err_media_entity_pipeline_start;
 
 	/* Verify that the currently configured format matches the output of
 	 * the connected subdev.
 	 */
 	ret = isp_video_check_format(video, vfh);
 	if (ret < 0)
-		goto error;
+		goto err_isp_video_check_format;
 
 	video->bpl_padding = ret;
 	video->bpl_value = vfh->format.fmt.pix.bytesperline;
@@ -1017,7 +1019,7 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 	} else {
 		if (far_end == NULL) {
 			ret = -EPIPE;
-			goto error;
+			goto err_isp_video_check_format;
 		}
 
 		state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT;
@@ -1032,7 +1034,7 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 	/* Validate the pipeline and update its state. */
 	ret = isp_video_validate_pipeline(pipe);
 	if (ret < 0)
-		goto error;
+		goto err_isp_video_check_format;
 
 	pipe->error = false;
 
@@ -1054,7 +1056,7 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 
 	ret = omap3isp_video_queue_streamon(&vfh->queue);
 	if (ret < 0)
-		goto error;
+		goto err_isp_video_check_format;
 
 	/* In sensor-to-memory mode, the stream can be started synchronously
 	 * to the stream on command. In memory-to-memory mode, it will be
@@ -1064,19 +1066,21 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 		ret = omap3isp_pipeline_set_stream(pipe,
 					      ISP_PIPELINE_STREAM_CONTINUOUS);
 		if (ret < 0)
-			goto error;
+			goto err_omap3isp_set_stream;
 		spin_lock_irqsave(&video->queue->irqlock, flags);
 		if (list_empty(&video->dmaqueue))
 			video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 		spin_unlock_irqrestore(&video->queue->irqlock, flags);
 	}
 
-error:
 	if (ret < 0) {
+err_omap3isp_set_stream:
 		omap3isp_video_queue_streamoff(&vfh->queue);
+err_isp_video_check_format:
+		media_entity_pipeline_stop(&video->video.entity);
+err_media_entity_pipeline_start:
 		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
-- 
1.7.2.5

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