[RFC PATCH net-next v3 03/15] net: dsa: mt7530: use regmap to access switch register space

[Andrew Lunn]

Thanks for splitting this patchset up. This is much easier to review.

> +static u32
> +mt7530_mii_read(struct mt7530_priv *priv, u32 reg)
> +{
> +	int ret;
> +	u32 val;
> +
> +	ret = regmap_read(priv->regmap, reg, &val);
> +	if (ret) {
> +		dev_err(priv->dev,
> +			"failed to read mt7530 register\n");
> +		return ret;

This is a u32 function. ret should be negative on error, which is
going to be turned positive in order to return a u32. So you probably
want to make this an int function.

     Andrew