On Thu, Oct 03, 2013 at 01:55:29AM +0200, Laurent Pinchart wrote:
> +
> + ret = vb2_streamon(&vfh->queue, type);
> + if (ret < 0)
> + goto err_iss_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
> + * started when buffers are queued on both the input and output.
> + */
> + if (pipe->input == NULL) {
> + unsigned long flags;
> + ret = omap4iss_pipeline_set_stream(pipe,
> + ISS_PIPELINE_STREAM_CONTINUOUS);
> + if (ret < 0)
> + goto err_omap4iss_set_stream;
> + spin_lock_irqsave(&video->qlock, flags);
> + if (list_empty(&video->dmaqueue))
> + video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN;
> + spin_unlock_irqrestore(&video->qlock, flags);
> + }
> +
> + if (ret < 0) {
> +err_omap4iss_set_stream:
> + vb2_streamoff(&vfh->queue, type);
> +err_iss_video_check_format:
> + media_entity_pipeline_stop(&video->video.entity);
> +err_media_entity_pipeline_start:
> + if (video->iss->pdata->set_constraints)
> + video->iss->pdata->set_constraints(video->iss, false);
> + video->queue = NULL;
> + }
> +
> + if (!ret)
> + video->streaming = 1;
> +
> + mutex_unlock(&video->stream_lock);
> + return ret;
> +}
This driver is mostly really nice code, but this error handling is
spaghetti-al-nasty. Just split up the success and failure returns.
video->streaming = 1;
mutex_unlock(&video->stream_lock);
return 0;
err_omap4iss_set_stream:
vb2_streamoff(&vfh->queue, type);
err_iss_video_check_format:
media_entity_pipeline_stop(&video->video.entity);
err_media_entity_pipeline_start:
if (video->iss->pdata->set_constraints)
video->iss->pdata->set_constraints(video->iss, false);
video->queue = NULL;
mutex_unlock(&video->stream_lock);
return ret;
}
regards,
dan carpenter
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