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Date:   Wed, 13 Dec 2023 15:45:24 +0000
From:   "Russell King (Oracle)" <linux@armlinux.org.uk>
To:     Christian Marangi <ansuelsmth@gmail.com>
Cc:     Florian Fainelli <florian.fainelli@broadcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@broadcom.com>,
        Andrew Lunn <andrew@lunn.ch>,
        Heiner Kallweit <hkallweit1@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Vladimir Oltean <olteanv@gmail.com>,
        David Epping <david.epping@missinglinkelectronics.com>,
        Harini Katakam <harini.katakam@amd.com>,
        Simon Horman <horms@kernel.org>, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [net-next PATCH v6 1/3] net: phy: extend PHY package API to
 support multiple global address
Message-ID: <ZXnRlERUGhwxKJxi@shell.armlinux.org.uk>
References: <20231213105730.1731-1-ansuelsmth@gmail.com>
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Sender: Russell King (Oracle) <linux@armlinux.org.uk>
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On Wed, Dec 13, 2023 at 11:57:28AM +0100, Christian Marangi wrote:
> -static inline int phy_package_read(struct phy_device *phydev, u32 regnum)
> +static inline int phy_package_read(struct phy_device *phydev,
> +				   unsigned int addr_offset, u32 regnum)
>  {
>  	struct phy_package_shared *shared = phydev->shared;
> +	int addr = shared->base_addr + addr_offset;
>  
> -	if (!shared)
> +	if (addr >= PHY_MAX_ADDR)
>  		return -EIO;

If we're going to check the address, I think we should check it
properly, which means also checking whether it's become negative.

Alternatively, we could consider making "addr" and "base_addr"
unsigned types, since they should never be negative. However,
that probably should be done as a separate patch before this one.

Thanks.

-- 
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