Re: [PATCH 1/1] drm/bridge: imx93-mipi-dsi: Use dev_err_probe

From: Liu Ying <victor.liu@nxp.com>
To: Alexander Stein <alexander.stein@ew.tq-group.com>,
	Andrzej Hajda <andrzej.hajda@intel.com>,
	Neil Armstrong <neil.armstrong@linaro.org>,
	Robert Foss <rfoss@kernel.org>,
	Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	Jonas Karlman <jonas@kwiboo.se>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>
Cc: dri-devel@lists.freedesktop.org, imx@lists.linux.dev,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] drm/bridge: imx93-mipi-dsi: Use dev_err_probe
Date: Tue, 28 May 2024 18:02:29 +0800	[thread overview]
Message-ID: <40bc3142-c7be-4dfc-a2ff-6ac209112aa6@nxp.com> (raw)
In-Reply-To: <20240528093922.194684-1-alexander.stein@ew.tq-group.com>

On 05/28/2024, Alexander Stein wrote:
> Although very unlike to occur (media_blk_ctrl needs 'syscon' compatible
> removed), it lines up with the other error paths in probe function.
> 
> Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
> ---
>  drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c b/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
> index 2347f8dd632f9..8331db3b4f054 100644
> --- a/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
> +++ b/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
> @@ -841,11 +841,9 @@ static int imx93_dsi_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	dsi->regmap = syscon_regmap_lookup_by_phandle(np, "fsl,media-blk-ctrl");
> -	if (IS_ERR(dsi->regmap)) {
> -		ret = PTR_ERR(dsi->regmap);
> -		dev_err(dev, "failed to get block ctrl regmap: %d\n", ret);
> -		return ret;
> -	}
> +	if (IS_ERR(dsi->regmap))
> +		return dev_err_probe(dev, PTR_ERR(dsi->regmap),
> +				     "failed to get block ctrl regmap");

Missing \n.

And, a build warning:
drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c: In function ‘imx93_dsi_probe’:
drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c:837:13: warning: unused variable ‘ret’ [-Wunused-variable]
  837 |         int ret;
      |             ^~~

Regards,
Liu Ying

>  
>  	dsi->clk_pixel = devm_clk_get(dev, "pix");
>  	if (IS_ERR(dsi->clk_pixel))