linux-kernel - Re: [PATCH net-next 10/14] net: dsa: mv88e6xxx: rework port mode setup

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Date:   Fri, 10 Mar 2017 01:29:28 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...oirfairelinux.com,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: Re: [PATCH net-next 10/14] net: dsa: mv88e6xxx: rework port mode
 setup

Hi Vivien

> +static int mv88e6xxx_set_port_mode_normal(struct mv88e6xxx_chip *chip, int port)
> +{
> +	return mv88e6xxx_set_port_mode(chip, port, MV88E6XXX_FRAME_MODE_NORMAL,
> +				       PORT_CONTROL_EGRESS_UNMODIFIED, 0x9100);

It would be nice to replace this magic number with a #define. How does
the datasheet describe this? 0x9100 is ETH_P_QINQ1. Would that
actually fit?

> +static int mv88e6xxx_setup_port_mode(struct mv88e6xxx_chip *chip, int port)
> +{
> +	if (dsa_is_dsa_port(chip->ds, port))
> +		return mv88e6xxx_set_port_mode_dsa(chip, port);
> +
> +	if (!dsa_is_cpu_port(chip->ds, port))
> +		return mv88e6xxx_set_port_mode_normal(chip, port);

Maybe add a dsa_is_normal_port() helper? It just makes the code even
easier to read.

       Andrew