linux-kernel - Re: [PATCH] net: phy: at803x: disable WOL at probe

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Message-ID: <20220526210044.638128f6@kernel.org>
Date:   Thu, 26 May 2022 21:00:44 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     "Viorel Suman (OSS)" <viorel.suman@....nxp.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, Luo Jie <luoj@...eaurora.org>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-imx@....com, Viorel Suman <viorel.suman@....com>
Subject: Re: [PATCH] net: phy: at803x: disable WOL at probe

On Wed, 25 May 2022 13:36:57 +0300 Viorel Suman (OSS) wrote:
> diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
> index 73926006d319..6277d1b1d814 100644
> --- a/drivers/net/phy/at803x.c
> +++ b/drivers/net/phy/at803x.c
> @@ -443,10 +443,10 @@ static int at803x_set_wol(struct phy_device *phydev,
>  		AT803X_LOC_MAC_ADDR_0_15_OFFSET,
>  	};
>  
> -	if (!ndev)
> -		return -ENODEV;
> -
>  	if (wol->wolopts & WAKE_MAGIC) {
> +		if (!ndev)
> +			return -ENODEV;

Please move the ndev variable into the scope.
It'll make it clear that it can't be used elsewhere
in this function.

>  		mac = (const u8 *) ndev->dev_addr;
>  
>  		if (!is_valid_ether_addr(mac))
> @@ -857,6 +857,9 @@ static int at803x_probe(struct phy_device *phydev)
>  	if (phydev->drv->phy_id == ATH8031_PHY_ID) {
>  		int ccr = phy_read(phydev, AT803X_REG_CHIP_CONFIG);
>  		int mode_cfg;
> +		struct ethtool_wolinfo wol = {
> +			.wolopts = 0,
> +		};
>  
>  		if (ccr < 0)
>  			goto err;
> @@ -872,6 +875,13 @@ static int at803x_probe(struct phy_device *phydev)
>  			priv->is_fiber = true;
>  			break;
>  		}
> +
> +		/* Disable WOL by default */
> +		ret = at803x_set_wol(phydev, &wol);
> +		if (ret < 0) {
> +			phydev_err(phydev, "failed to disable WOL on probe: %d\n", ret);
> +			return ret;

Don't you need to goto err; here?

> +		}
>  	}
>  
>  	return 0;