linux-kernel - Re: [PATCH v3 3/3] net: dsa: mv88e6xxx: Support serdes ports on MV88E6123/6131

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Message-ID: <20201020101851.GC1551@shell.armlinux.org.uk>
Date:   Tue, 20 Oct 2020 11:18:51 +0100
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>
Cc:     andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com,
        olteanv@...il.com, davem@...emloft.net, kuba@...nel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/3] net: dsa: mv88e6xxx: Support serdes ports on
 MV88E6123/6131

On Tue, Oct 20, 2020 at 04:45:58PM +1300, Chris Packham wrote:
> +void mv88e6123_serdes_get_regs(struct mv88e6xxx_chip *chip, int port, void *_p)
> +{
> +	u16 *p = _p;
> +	u16 reg;
> +	int i;
> +
> +	if (mv88e6xxx_serdes_get_lane(chip, port) == 0)
> +		return;
> +
> +	for (i = 0; i < 26; i++) {
> +		mv88e6xxx_phy_read(chip, port, i, &reg);

Shouldn't this deal with a failed read in some way, rather than just
assigning the last or possibly uninitialised value to p[i] ?

-- 
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