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Date: Fri, 12 Jan 2024 10:35:25 +0100
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From: neil.armstrong@linaro.org
Reply-To: neil.armstrong@linaro.org
Subject: Re: [PATCH linux-next] drm/panel: samsung: Simplify with
 dev_err_probe()
Content-Language: en-US, fr
To: chenguanxi11234@163.com
Cc: cgel.zte@gmail.com, yang.guang5@zte.com.cn, quic_jesszhan@quicinc.com,
 sam@ravnborg.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org,
 tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch,
 dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
 Chen Haonan <chen.haonan2@zte.com.cn>
References: <061ed94a003362bb7d7e9d3e4d38358c5b91c8a3.1704186827.git.chen.haonan2@zte.com.cn>
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On 03/01/2024 15:17, chenguanxi11234@163.com wrote:
> From: Chen Haonan <chen.haonan2@zte.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@zte.com.cn>
> ---
>   drivers/gpu/drm/panel/panel-samsung-s6d16d0.c | 6 ++----
>   1 file changed, 2 insertions(+), 4 deletions(-)
> diff --git a/drivers/gpu/drm/panel/panel-samsung-s6d16d0.c b/drivers/gpu/drm/panel/panel-samsung-s6d16d0.c
> index 79f611963c61..f4103e762b53 100644
> --- a/drivers/gpu/drm/panel/panel-samsung-s6d16d0.c
> +++ b/drivers/gpu/drm/panel/panel-samsung-s6d16d0.c
> @@ -194,10 +194,8 @@ static int s6d16d0_probe(struct mipi_dsi_device *dsi)
>   	s6->reset_gpio = devm_gpiod_get_optional(dev, "reset",
>   						GPIOD_OUT_HIGH);
>   	if (IS_ERR(s6->reset_gpio)) {
> -		ret = PTR_ERR(s6->reset_gpio);
> -		if (ret != -EPROBE_DEFER)
> -			dev_err(dev, "failed to request GPIO (%d)\n", ret);
> -		return ret;
> +		return dev_err_probe(dev, PTR_ERR(s6->reset_gpio),
> +							 "failed to request GPIO\n");
>   	}
>   
>   	drm_panel_init(&s6->panel, dev, &s6d16d0_drm_funcs,

This patch fails to apply on current drm-misc-next, please refresh.

Neil