linux-kernel - Re: [PATCH 1/7] thermal: rockchip: Simplify getting match data

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Message-ID: <6623921.lOV4Wx5bFT@phil>
Date:   Tue, 15 Nov 2022 12:19:57 +0100
From:   Heiko Stuebner <heiko@...ech.de>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Sebastian Reichel <sebastian.reichel@...labora.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-pm@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        kernel@...labora.com
Subject: Re: [PATCH 1/7] thermal: rockchip: Simplify getting match data

Am Montag, 31. Oktober 2022, 18:50:52 CET schrieb Sebastian Reichel:
> It's possible to directly get the match data in a generic
> way nowadays.
> 
> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
> ---
>  drivers/thermal/rockchip_thermal.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
> 
> diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
> index 819e059cde71..0a0f38c29842 100644
> --- a/drivers/thermal/rockchip_thermal.c
> +++ b/drivers/thermal/rockchip_thermal.c
> @@ -1353,16 +1353,11 @@ static int rockchip_thermal_probe(struct platform_device *pdev)
>  {
>  	struct device_node *np = pdev->dev.of_node;
>  	struct rockchip_thermal_data *thermal;
> -	const struct of_device_id *match;
>  	struct resource *res;
>  	int irq;
>  	int i;
>  	int error;
>  
> -	match = of_match_node(of_rockchip_thermal_match, np);
> -	if (!match)
> -		return -ENXIO;
> -
>  	irq = platform_get_irq(pdev, 0);
>  	if (irq < 0)
>  		return -EINVAL;
> @@ -1374,7 +1369,7 @@ static int rockchip_thermal_probe(struct platform_device *pdev)
>  
>  	thermal->pdev = pdev;
>  
> -	thermal->chip = (const struct rockchip_tsadc_chip *)match->data;
> +	thermal->chip = (const struct rockchip_tsadc_chip *) device_get_match_data(&pdev->dev);

Nit: This can work without the explicit cast and most users
in the kernel also use it that way - makes reading far easier.

Otherwise
Reviewed-by: Heiko Stuebner <heiko@...ech.de>

Heiko

>  	if (!thermal->chip)
>  		return -EINVAL;
>  
>