Hi Sakari,
Thanks for the patch.
On Friday 02 March 2012 19:30:32 Sakari Ailus wrote:
> Since media_entity_pipeline_start() now does link validation, it may
> actually fail. Perform the error handling.
>
> Signed-off-by: Sakari Ailus <sakari.ai...@iki.fi>
>
> ---
> drivers/media/video/omap3isp/ispvideo.c | 53
> +++++++++++++++++-------------- 1 files changed, 29 insertions(+), 24
> deletions(-)
>
> diff --git a/drivers/media/video/omap3isp/ispvideo.c
> b/drivers/media/video/omap3isp/ispvideo.c index b0d541b..f2621bc 100644
> --- a/drivers/media/video/omap3isp/ispvideo.c
> +++ b/drivers/media/video/omap3isp/ispvideo.c
> @@ -997,14 +997,16 @@ isp_video_streamon(struct file *file, void *fh, enum
> v4l2_buf_type type) pipe->l3_ick =
> clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]);
> pipe->max_rate = pipe->l3_ick;
>
> - 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;
> @@ -1021,7 +1023,7 @@ 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
> @@ -1064,32 +1066,35 @@ 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) {
> - omap3isp_video_queue_streamoff(&vfh->queue);
> - media_entity_pipeline_stop(&video->video.entity);
> - if (video->isp->pdata->set_constraints)
> - video->isp->pdata->set_constraints(video->isp, false);
> - /* 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;
> - }
> + video->streaming = 1;
> +
> + mutex_unlock(&video->stream_lock);
> + return 0;
>
> - if (!ret)
> - video->streaming = 1;
> +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:
Could you please shorten the labels a bit (err_set_stream, err_check_format
and err_pipeline_start for instance) ?
> + if (video->isp->pdata->set_constraints)
> + video->isp->pdata->set_constraints(video->isp, false);
> + /* 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.
Please reindent the text to the 80 columns limits.
> + */
> + INIT_LIST_HEAD(&video->dmaqueue);
> + video->queue = NULL;
>
> mutex_unlock(&video->stream_lock);
> return ret;
--
Regards,
Laurent Pinchart
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