linux-kernel - Re: [PATCH v6 4/4] drm/bridge: lvds-codec: simplify error handling

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Message-ID: <ba4337c1-97b5-46e7-8181-ffadf98935e8@baylibre.com>
Date:   Mon, 29 Jun 2020 10:33:24 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Andrzej Hajda <a.hajda@...sung.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        andy.shevchenko@...il.com, Mark Brown <broonie@...nel.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Daniel Vetter <daniel@...ll.ch>,
        "open list:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH v6 4/4] drm/bridge: lvds-codec: simplify error handling

On 26/06/2020 12:01, Andrzej Hajda wrote:
> Using dev_err_probe code has following advantages:
> - shorter code,
> - recorded defer probe reason for debugging,
> - uniform error code logging.
> 
> Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
> ---
>  drivers/gpu/drm/bridge/lvds-codec.c | 10 +++-------
>  1 file changed, 3 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/lvds-codec.c b/drivers/gpu/drm/bridge/lvds-codec.c
> index 24fb1befdfa2..f19d9f7a5db2 100644
> --- a/drivers/gpu/drm/bridge/lvds-codec.c
> +++ b/drivers/gpu/drm/bridge/lvds-codec.c
> @@ -71,13 +71,9 @@ static int lvds_codec_probe(struct platform_device *pdev)
>  	lvds_codec->connector_type = (uintptr_t)of_device_get_match_data(dev);
>  	lvds_codec->powerdown_gpio = devm_gpiod_get_optional(dev, "powerdown",
>  							     GPIOD_OUT_HIGH);
> -	if (IS_ERR(lvds_codec->powerdown_gpio)) {
> -		int err = PTR_ERR(lvds_codec->powerdown_gpio);
> -
> -		if (err != -EPROBE_DEFER)
> -			dev_err(dev, "powerdown GPIO failure: %d\n", err);
> -		return err;
> -	}
> +	if (IS_ERR(lvds_codec->powerdown_gpio))
> +		return dev_err_probe(dev, PTR_ERR(lvds_codec->powerdown_gpio),
> +				     "powerdown GPIO failure\n");
>  
>  	/* Locate the panel DT node. */
>  	panel_node = of_graph_get_remote_node(dev->of_node, 1, 0);
> 

Reviewed-by: Neil Armstrong <narmstrong@...libre.com>