linux-kernel - Re: [PATCH linux-next] drm/panel: Simplify with dev_err

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Message-ID: <e41db6d2-2c3c-4dbe-a01c-6587fc762e68@linaro.org>
Date: Fri, 22 Dec 2023 09:02:04 +0100
From: neil.armstrong@...aro.org
To: yang.guang5@....com.cn, hanxu5@...qin.corp-partner.google.com
Cc: jiang.xuexin@....com.cn, chen.haonan2@....com.cn, cgel.zte@...il.com,
 quic_jesszhan@...cinc.com, sam@...nborg.org,
 maarten.lankhorst@...ux.intel.com, mripard@...nel.org, tzimmermann@...e.de,
 airlied@...il.com, daniel@...ll.ch, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH linux-next] drm/panel: Simplify with dev_err_probe()

On 20/12/2023 03:48, yang.guang5@....com.cn wrote:
> From: Yang Guang <yang.guang5@....com.cn>
> 
> dev_err_probe() can check if the error code is -EPROBE_DEFER
> and can return the error code, replacing dev_err() with it
> simplifies the code.
> 
> Signed-off-by: Chen Haonan <chen.haonan2@....com.cn>

Got the following checkpatch error:
ERROR:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Yang Guang <yang.guang5@....com.cn>'

Thanks,
Neil

> ---
>   drivers/gpu/drm/panel/panel-boe-himax8279d.c | 18 ++++++------------
>   1 file changed, 6 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-boe-himax8279d.c b/drivers/gpu/drm/panel/panel-boe-himax8279d.c
> index 11b64acbe8a9..e225840b0d67 100644
> --- a/drivers/gpu/drm/panel/panel-boe-himax8279d.c
> +++ b/drivers/gpu/drm/panel/panel-boe-himax8279d.c
> @@ -854,26 +854,20 @@ static int panel_add(struct panel_info *pinfo)
> 
>   	pinfo->pp18_gpio = devm_gpiod_get(dev, "pp18", GPIOD_OUT_HIGH);
>   	if (IS_ERR(pinfo->pp18_gpio)) {
> -		ret = PTR_ERR(pinfo->pp18_gpio);
> -		if (ret != -EPROBE_DEFER)
> -			dev_err(dev, "failed to get pp18 gpio: %d\n", ret);
> -		return ret;
> +		return dev_err_probe(dev, PTR_ERR(pinfo->pp18_gpio),
> +							 "failed to get pp18 gpio\n");
>   	}
> 
>   	pinfo->pp33_gpio = devm_gpiod_get(dev, "pp33", GPIOD_OUT_HIGH);
>   	if (IS_ERR(pinfo->pp33_gpio)) {
> -		ret = PTR_ERR(pinfo->pp33_gpio);
> -		if (ret != -EPROBE_DEFER)
> -			dev_err(dev, "failed to get pp33 gpio: %d\n", ret);
> -		return ret;
> +		return	dev_err_probe(dev, PTR_ERR(pinfo->pp33_gpio),
> +							 "failed to get pp33 gpio\n");
>   	}
> 
>   	pinfo->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
>   	if (IS_ERR(pinfo->enable_gpio)) {
> -		ret = PTR_ERR(pinfo->enable_gpio);
> -		if (ret != -EPROBE_DEFER)
> -			dev_err(dev, "failed to get enable gpio: %d\n", ret);
> -		return ret;
> +		return	dev_err_probe(dev, PTR_ERR(pinfo->enable_gpio),
> +						 "failed to get enable gpio\n");
>   	}
> 
>   	drm_panel_init(&pinfo->base, dev, &panel_funcs,