linux-kernel - Re: [PATCH net-next v2] net: mdio: mscc-miim: Use devm_platform_get_and_ioremap

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Message-ID: <72e99523-b1f0-bff4-ad96-0d71b3901480@huawei.com>
Date:   Fri, 11 Jun 2021 14:57:48 +0800
From:   "weiyongjun (A)" <weiyongjun1@...wei.com>
To:     Yang Yingliang <yangyingliang@...wei.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "andrew@...n.ch" <andrew@...n.ch>
Subject: Re: [PATCH net-next v2] net: mdio: mscc-miim: Use
 devm_platform_get_and_ioremap_resource()


> Use devm_platform_get_and_ioremap_resource() to simplify
> code.
>
> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
> ---
> v2:
>    only convert the first platform_get_resource()
> ---
>   drivers/net/mdio/mdio-mscc-miim.c | 6 +-----
>   1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/drivers/net/mdio/mdio-mscc-miim.c b/drivers/net/mdio/mdio-mscc-miim.c
> index b36e5ea04ddf..071c654bab29 100644
> --- a/drivers/net/mdio/mdio-mscc-miim.c
> +++ b/drivers/net/mdio/mdio-mscc-miim.c
> @@ -139,10 +139,6 @@ static int mscc_miim_probe(struct platform_device *pdev)
>   	struct mscc_miim_dev *dev;
>   	int ret;
>   
> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!res)
> -		return -ENODEV;
> -
>   	bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*dev));
>   	if (!bus)
>   		return -ENOMEM;
> @@ -155,7 +151,7 @@ static int mscc_miim_probe(struct platform_device *pdev)
>   	bus->parent = &pdev->dev;
>   
>   	dev = bus->priv;
> -	dev->regs = devm_ioremap_resource(&pdev->dev, res);
> +	dev->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);


res not used later, so should be

dev->regs = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);


>   	if (IS_ERR(dev->regs)) {
>   		dev_err(&pdev->dev, "Unable to map MIIM registers\n");
>   		return PTR_ERR(dev->regs);