linux-kernel - Re: [PATCH net-next v2 4/7] net: mscc: Add initial Ocelot switch support

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Message-ID: <20180426210915.GE23481@lunn.ch>
Date:   Thu, 26 Apr 2018 23:09:15 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Allan Nielsen <Allan.Nielsen@...rosemi.com>,
        razvan.stefanescu@....com, po.liu@....com,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mips@...ux-mips.org
Subject: Re: [PATCH net-next v2 4/7] net: mscc: Add initial Ocelot switch
 support

> +/* Checks if the net_device instance given to us originate from our driver. */
> +static bool ocelot_netdevice_dev_check(const struct net_device *dev)
> +{
> +	return dev->netdev_ops == &ocelot_port_netdev_ops;
> +}

This is probably O.K. now, but when you add support for controlling
the switch over PCIe, i think it breaks. A board could have two
switches...

It might be possible to do something with dev->parent. All ports of a
switch should have the same parent.

       Andrew