linux-kernel - Re: [RFC PATCH 1/2] net: fec: make fec_reset

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Message-ID: <Ya4MgQA7lqiSrWoX@lunn.ch>
Date:   Mon, 6 Dec 2021 14:13:37 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Philippe Schenker <philippe.schenker@...adex.com>
Cc:     netdev@...r.kernel.org, Joakim Zhang <qiangqing.zhang@....com>,
        Fabio Estevam <festevam@...il.com>,
        Fugang Duan <fugang.duan@....com>,
        "David S . Miller" <davem@...emloft.net>,
        Russell King <linux@...linux.org.uk>,
        Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 1/2] net: fec: make fec_reset_phy not only usable once

>  #ifdef CONFIG_OF
> -static int fec_reset_phy(struct platform_device *pdev)
> +static int fec_reset_phy_probe(struct platform_device *pdev,
> +			       struct net_device *ndev)
>  {
> -	int err, phy_reset;
> -	bool active_high = false;
> -	int msec = 1, phy_post_delay = 0;
>  	struct device_node *np = pdev->dev.of_node;
> +	struct fec_enet_private *fep = netdev_priv(ndev);
> +	int tmp, ret;
>  
>  	if (!np)
>  		return 0;
>  
> -	err = of_property_read_u32(np, "phy-reset-duration", &msec);
> +	tmp = 1;
> +	ret = of_property_read_u32(np, "phy-reset-duration", &tmp);
>  	/* A sane reset duration should not be longer than 1s */
> -	if (!err && msec > 1000)
> -		msec = 1;
> +	if (!ret && tmp > 1000)
> +		tmp = 1;
> +
> +	fep->phy_reset_duration = tmp;

If you don't change the names msec and ret, this code would be
unchanged. It then becomes a lot easier to see you have not changed,
the code, only moved it around.

    Andrew