linux-kernel - Re: [PATCH v2] media: aspeed: move err-handling together to the bottom

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Date:   Tue, 14 Dec 2021 15:53:00 +0100
From:   Mauro Carvalho Chehab <mchehab@...nel.org>
To:     Jammy Huang <jammy_huang@...eedtech.com>
Cc:     <hverkuil-cisco@...all.nl>, <sakari.ailus@...ux.intel.com>,
        <gregkh@...uxfoundation.org>, <laurent.pinchart@...asonboard.com>,
        <eajames@...ux.ibm.com>, <joel@....id.au>, <andrew@...id.au>,
        <linux-media@...r.kernel.org>, <openbmc@...ts.ozlabs.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-aspeed@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] media: aspeed: move err-handling together to the
 bottom

Em Mon, 6 Dec 2021 08:48:11 +0800
Jammy Huang <jammy_huang@...eedtech.com> escreveu:

> refine aspeed_video_setup_video() flow.

Why? It makes no difference where the error handling code is. Let's
keep it as preferred by the driver's author ;-)

Regards,
Mauro

> 
> Signed-off-by: Jammy Huang <jammy_huang@...eedtech.com>
> ---
> v2:
>  - remove change-id in comment
> ---
>  drivers/media/platform/aspeed-video.c | 24 +++++++++++-------------
>  1 file changed, 11 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c
> index fea5e4d0927e..f5c40d6b4ece 100644
> --- a/drivers/media/platform/aspeed-video.c
> +++ b/drivers/media/platform/aspeed-video.c
> @@ -1641,11 +1641,8 @@ static int aspeed_video_setup_video(struct aspeed_video *video)
>  
>  	rc = video->ctrl_handler.error;
>  	if (rc) {
> -		v4l2_ctrl_handler_free(&video->ctrl_handler);
> -		v4l2_device_unregister(v4l2_dev);
> -
>  		dev_err(video->dev, "Failed to init controls: %d\n", rc);
> -		return rc;
> +		goto err_ctrl_init;
>  	}
>  
>  	v4l2_dev->ctrl_handler = &video->ctrl_handler;
> @@ -1663,11 +1660,8 @@ static int aspeed_video_setup_video(struct aspeed_video *video)
>  
>  	rc = vb2_queue_init(vbq);
>  	if (rc) {
> -		v4l2_ctrl_handler_free(&video->ctrl_handler);
> -		v4l2_device_unregister(v4l2_dev);
> -
>  		dev_err(video->dev, "Failed to init vb2 queue\n");
> -		return rc;
> +		goto err_vb2_init;
>  	}
>  
>  	vdev->queue = vbq;
> @@ -1685,15 +1679,19 @@ static int aspeed_video_setup_video(struct aspeed_video *video)
>  	video_set_drvdata(vdev, video);
>  	rc = video_register_device(vdev, VFL_TYPE_GRABBER, 0);
>  	if (rc) {
> -		vb2_queue_release(vbq);
> -		v4l2_ctrl_handler_free(&video->ctrl_handler);
> -		v4l2_device_unregister(v4l2_dev);
> -
>  		dev_err(video->dev, "Failed to register video device\n");
> -		return rc;
> +		goto err_video_reg;
>  	}
>  
>  	return 0;
> +
> +err_video_reg:
> +	vb2_queue_release(vbq);
> +err_vb2_init:
> +err_ctrl_init:
> +	v4l2_ctrl_handler_free(&video->ctrl_handler);
> +	v4l2_device_unregister(v4l2_dev);
> +	return rc;
>  }
>  
>  static int aspeed_video_init(struct aspeed_video *video)



Thanks,
Mauro