linux-kernel - Re: [PATCH 2/4] net: phy: adin1100: Add ethtool get

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Message-ID: <YNS+rEcYXlTqirwg@lunn.ch>
Date:   Thu, 24 Jun 2021 19:19:40 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     alexandru.tachici@...log.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        davem@...emloft.net, kuba@...nel.org, linux@...linux.org.uk
Subject: Re: [PATCH 2/4] net: phy: adin1100: Add ethtool get_stats support

> +static u64 adin_get_stat(struct phy_device *phydev, int i)
> +{
> +	const struct adin_hw_stat *stat = &adin_hw_stats[i];
> +	struct adin_priv *priv = phydev->priv;
> +	u64 val;
> +	int ret;
> +
> +	ret = phy_read_mmd(phydev, MDIO_MMD_VEND2, stat->reg1);
> +	if (ret < 0)
> +		return (u64)(~0);

U64_MAX is more common.

	Andrew