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Date:   Wed, 29 Mar 2023 18:24:21 +0200
From:   Andrew Lunn <andrew@lunn.ch>
To:     Daniel Golle <daniel@makrotopia.org>
Cc:     netdev@vger.kernel.org, linux-mediatek@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Florian Fainelli <f.fainelli@gmail.com>,
        Vladimir Oltean <olteanv@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        Sean Wang <sean.wang@mediatek.com>,
        Landen Chao <Landen.Chao@mediatek.com>,
        DENG Qingfang <dqfext@gmail.com>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Sam Shih <Sam.Shih@mediatek.com>,
        Lorenzo Bianconi <lorenzo@kernel.org>,
        John Crispin <john@phrozen.org>, Felix Fietkau <nbd@nbd.name>
Subject: Re: [RFC PATCH net-next v3 03/15] net: dsa: mt7530: use regmap to
 access switch register space
Message-ID: <7eb07ed2-2b1c-44fa-b029-0ecad7872fd2@lunn.ch>
References: <cover.1680105013.git.daniel@makrotopia.org>
 <754322262cd754aee5916954b8e651989b229a09.1680105013.git.daniel@makrotopia.org>
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Precedence: bulk

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