netdev - Re: [PATCH 06/11] net: dsa: microchip: ksz8795: use phy_port

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Date:   Thu, 19 Nov 2020 01:29:15 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Michael Grzeschik <m.grzeschik@...gutronix.de>
Cc:     netdev@...r.kernel.org, f.fainelli@...il.com, davem@...emloft.net,
        kernel@...gutronix.de, matthias.schiffer@...tq-group.com,
        woojung.huh@...rochip.com, UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH 06/11] net: dsa: microchip: ksz8795: use phy_port_cnt
 where possible

>  	case BR_STATE_DISABLED:
>  		data |= PORT_LEARN_DISABLE;
> -		if (port < SWITCH_PORT_NUM)
> +		if (port < dev->phy_port_cnt)
>  			member = 0;
>  		break;

So this, unlike all the other patches so far, is not obviously
correct. What exactly does phy_port_cnt mean? Can there be ports
without PHYs? What if the PHYs are external? You still need to be able
to change the STP state of such ports.

Andrew