netdev - Re: [PATCH v5 2/6] staging: fsl-dpaa2/ethsw: Add Freescale DPAA2 Ethernet Switch driver

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Message-ID: <20180313152614.GC17895@lunn.ch>
Date:   Tue, 13 Mar 2018 16:26:14 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Razvan Stefanescu <razvan.stefanescu@....com>
Cc:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Alexander Graf <agraf@...e.de>,
        "arnd@...db.de" <arnd@...db.de>,
        Alexandru Marginean <alexandru.marginean@....com>,
        Ruxandra Ioana Ciocoi Radulescu <ruxandra.radulescu@....com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        "stuyoder@...il.com" <stuyoder@...il.com>
Subject: Re: [PATCH v5 2/6] staging: fsl-dpaa2/ethsw: Add Freescale DPAA2
 Ethernet Switch driver

> Hello Andrew,
> 
> The current driver implementation uses only a single FDB for the switch,
> so  it is not possible configure multiple flooding domains to accommodate
> ports partitioning.

Ah, O.K. Rather than break somebodies network by wrongly flooding, it
would be better to return -EOPNOTSUPP when the requirement for the
second FDB is met. The offload to hardware will then not happen, and
the software bridge will do all the work.

    Andrew