netdev - RE: [PATCH v1 net-next 0/7] net: dsa: microchip: Modify KSZ9477 DSA driver in preparation to add other KSZ switch drivers

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Date:   Fri, 17 Nov 2017 19:33:47 +0000
From:   <Tristram.Ha@...rochip.com>
To:     <andrew@...n.ch>
CC:     <davem@...emloft.net>, <f.fainelli@...il.com>, <pavel@....cz>,
        <arkadis@...lanox.com>, <UNGLinuxDriver@...rochip.com>,
        <netdev@...r.kernel.org>
Subject: RE: [PATCH v1 net-next 0/7] net: dsa: microchip: Modify KSZ9477 DSA
 driver in preparation to add other KSZ switch drivers

> On Thu, Nov 16, 2017 at 06:41:24PM -0800, Tristram.Ha@...rochip.com
> wrote:
> > From: Tristram Ha <Tristram.Ha@...rochip.com>
> >
> > This series of patches is to modify the original KSZ9477 DSA driver so
> > that other KSZ switch drivers can be added and use the common code.
> 
> Hi Tristram
> 
> http://vger.kernel.org/~davem/net-next.html
> 
> It is better to send an RFC patchset while netdev is closed and not
> send it to David. He will shout at you otherwise.

Noted.

I really need to monitor the DSA discussion to better contribute to its success.
I just found out the DSA API set_addr was removed last month due to not
everybody is using it.  It cited the Marvell switch was the only switch using that
API and found a new way to program the MAC address.  But looking at that
driver I found it simply uses a randomized MAC address.

For big switch with many ports where the main function is forwarding that MAC
address may not matter.  For small switch with 2 ports it acts more like an Ethernet
controller where the switch is mainly used for daisy chaining in a ring network the MAC
address can be used in feature like source address filtering.