linux-kernel - Re: [PATCH 3/7] media: cedrus: Improve error messages for controls

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Date:   Mon, 11 Jul 2022 18:35:57 -0300
From:   Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
To:     Jernej Skrabec <jernej.skrabec@...il.com>
Cc:     mripard@...nel.org, paul.kocialkowski@...tlin.com, wens@...e.org,
        samuel@...lland.org, mchehab@...nel.org,
        gregkh@...uxfoundation.org, hverkuil-cisco@...all.nl,
        linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/7] media: cedrus: Improve error messages for controls

On Mon, Jun 20, 2022 at 07:55:13PM +0200, Jernej Skrabec wrote:
> Currently error messages when control creation fails are very sparse.
> Granted, user should never observe them. However, developer working on
> codecs can. In such cases additional information like which control
> creation failed and error number are very useful.
> 
> Expand error messages with additional info.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@...il.com>

Reviewed-by: Ezequiel Garcia <ezequiel@...guardiasur.com.ar>

> ---
>  drivers/staging/media/sunxi/cedrus/cedrus.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c
> index b12219123a6b..99c87319d2b4 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
> @@ -242,7 +242,8 @@ static int cedrus_init_ctrls(struct cedrus_dev *dev, struct cedrus_ctx *ctx)
>  	v4l2_ctrl_handler_init(hdl, CEDRUS_CONTROLS_COUNT);
>  	if (hdl->error) {
>  		v4l2_err(&dev->v4l2_dev,
> -			 "Failed to initialize control handler\n");
> +			 "Failed to initialize control handler: %d\n",
> +			 hdl->error);
>  		return hdl->error;
>  	}
>  
> @@ -257,7 +258,9 @@ static int cedrus_init_ctrls(struct cedrus_dev *dev, struct cedrus_ctx *ctx)
>  					    NULL);
>  		if (hdl->error) {
>  			v4l2_err(&dev->v4l2_dev,
> -				 "Failed to create new custom control\n");
> +				 "Failed to create %s control: %d\n",
> +				 v4l2_ctrl_get_name(cedrus_controls[i].cfg.id),
> +				 hdl->error);
>  
>  			v4l2_ctrl_handler_free(hdl);
>  			kfree(ctx->ctrls);
> -- 
> 2.36.1
>