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Date:   Fri, 11 Nov 2022 06:26:56 +0100
From:   Oleksij Rempel <o.rempel@pengutronix.de>
To:     Florian Fainelli <f.fainelli@gmail.com>
Cc:     Woojung Huh <woojung.huh@microchip.com>,
        UNGLinuxDriver@microchip.com, Andrew Lunn <andrew@lunn.ch>,
        Vivien Didelot <vivien.didelot@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>,
        Arun Ramadoss <arun.ramadoss@microchip.com>,
        kernel@pengutronix.de, linux-kernel@vger.kernel.org,
        netdev@vger.kernel.org
Subject: Re: [PATCH net-next v4 1/4] net: dsa: microchip: move max mtu to one
 location
Message-ID: <20221111052656.GC27099@pengutronix.de>
References: <20221110122225.1283326-1-o.rempel@pengutronix.de>
 <20221110122225.1283326-2-o.rempel@pengutronix.de>
 <53bd4c46-17f9-91c1-fda5-bd2d09ae2ff7@gmail.com>
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In-Reply-To: <53bd4c46-17f9-91c1-fda5-bd2d09ae2ff7@gmail.com>
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Hi Florian,

On Thu, Nov 10, 2022 at 06:42:03AM -0800, Florian Fainelli wrote:
> 
> 
> On 11/10/2022 4:22 AM, Oleksij Rempel wrote:
> > There are no HW specific registers, so we can process all of them
> > in one location.
> > 
> > Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
> > Tested-by: Arun Ramadoss <arun.ramadoss@microchip.com> (KSZ9893 and LAN937x)
> 
> This looks good to me, just one nit see below
> 
> [snip]
> 
> > @@ -2500,10 +2499,23 @@ static int ksz_max_mtu(struct dsa_switch *ds, int port)
> >   {
> >   	struct ksz_device *dev = ds->priv;
> > -	if (!dev->dev_ops->max_mtu)
> > -		return -EOPNOTSUPP;
> > +	switch (dev->chip_id) {
> > +	case KSZ8563_CHIP_ID:
> > +	case KSZ9477_CHIP_ID:
> > +	case KSZ9563_CHIP_ID:
> > +	case KSZ9567_CHIP_ID:
> > +	case KSZ9893_CHIP_ID:
> > +	case KSZ9896_CHIP_ID:
> > +	case KSZ9897_CHIP_ID:
> > +	case LAN9370_CHIP_ID:
> > +	case LAN9371_CHIP_ID:
> > +	case LAN9372_CHIP_ID:
> > +	case LAN9373_CHIP_ID:
> > +	case LAN9374_CHIP_ID:
> > +		return KSZ9477_MAX_FRAME_SIZE - VLAN_ETH_HLEN - ETH_FCS_LEN;
> 
> Rename to KSZ_MAX_FRAME_SIZE to denote this is a common constant?

This is not so common. This list is extended by the patch 4, with two
more types of switches with different max frame size.

Regards,
Oleksij
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