netdev - Re: [PATCH v4 net-next 05/10] net: dsa: microchip: add DSA support for microchip lan937x

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Date:   Thu, 7 Oct 2021 23:58:51 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Prasanna Vengateshan <prasanna.vengateshan@...rochip.com>
Cc:     netdev@...r.kernel.org, olteanv@...il.com, robh+dt@...nel.org,
        UNGLinuxDriver@...rochip.com, Woojung.Huh@...rochip.com,
        hkallweit1@...il.com, linux@...linux.org.uk, davem@...emloft.net,
        kuba@...nel.org, linux-kernel@...r.kernel.org,
        vivien.didelot@...il.com, f.fainelli@...il.com,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v4 net-next 05/10] net: dsa: microchip: add DSA support
 for microchip lan937x

> +static int lan937x_sw_mdio_read(struct mii_bus *bus, int addr, int regnum)
> +{
> +	struct ksz_device *dev = bus->priv;
> +	u16 val;
> +	int ret;
> +

It would be good to check for C45 regnum values and return -EOPNOTSUPP.


> +	ret = lan937x_internal_phy_read(dev, addr, regnum, &val);
> +	if (ret < 0)
> +		return ret;
> +
> +	return val;
> +}
> +
> +static int lan937x_sw_mdio_write(struct mii_bus *bus, int addr, int regnum,
> +				 u16 val)
> +{
> +	struct ksz_device *dev = bus->priv;
> +

Same here.

     Andrew