linux-kernel - Re: [PATCH 3/3] can: mscan: mpc5xxx_can: Use of_device_get_match

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Message-ID: <20210823123715.j4khoyld5mfl6kdv@pengutronix.de>
Date:   Mon, 23 Aug 2021 14:37:15 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Tang Bin <tangbin@...s.chinamobile.com>
Cc:     davem@...emloft.net, wg@...ndegger.com, kuba@...nel.org,
        kevinbrace@...cecomputerlab.com, romieu@...zoreil.com,
        linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] can: mscan: mpc5xxx_can: Use
 of_device_get_match_data to simplify code

On 23.08.2021 19:33:38, Tang Bin wrote:
> Retrieve OF match data, it's better and cleaner to use
> 'of_device_get_match_data' over 'of_match_device'.
> 
> Signed-off-by: Tang Bin <tangbin@...s.chinamobile.com>

Thanks for the patch!

LGTM, comment inside.

> ---
>  drivers/net/can/mscan/mpc5xxx_can.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/can/mscan/mpc5xxx_can.c b/drivers/net/can/mscan/mpc5xxx_can.c
> index e254e04ae..3b7465acd 100644
> --- a/drivers/net/can/mscan/mpc5xxx_can.c
> +++ b/drivers/net/can/mscan/mpc5xxx_can.c
> @@ -279,7 +279,6 @@ static u32 mpc512x_can_get_clock(struct platform_device *ofdev,
>  static const struct of_device_id mpc5xxx_can_table[];
>  static int mpc5xxx_can_probe(struct platform_device *ofdev)
>  {
> -	const struct of_device_id *match;
>  	const struct mpc5xxx_can_data *data;
>  	struct device_node *np = ofdev->dev.of_node;
>  	struct net_device *dev;
> @@ -289,10 +288,9 @@ static int mpc5xxx_can_probe(struct platform_device *ofdev)
>  	int irq, mscan_clksrc = 0;
>  	int err = -ENOMEM;
>  
> -	match = of_match_device(mpc5xxx_can_table, &ofdev->dev);
> -	if (!match)
> +	data = of_device_get_match_data(&ofdev->dev);
> +	if (!data)
>  		return -EINVAL;

Please remove the "BUG_ON(!data)", which comes later.

> -	data = match->data;
>  
>  	base = of_iomap(np, 0);
>  	if (!base) {
> -- 
> 2.20.1.windows.1
> 
> 
> 
> 

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |

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