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Date:   Thu, 28 Feb 2019 17:37:29 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Flavio Suligoi <f.suligoi@...m.it>
Cc:     Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        "David S . Miller" <davem@...emloft.net>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] net: e1000e: add MAC address kernel cmd line parameter

> Hi Andrew,
> 
> we produce a lot of boards and we have to change the MAC address,
> from u-boot, for every board.  So I must save in the u-boot
> environment (SPI NOR flash) the MAC address for every board.

Hi Flavio

u-boot should be able to write the MAC address in the correct part of
device tree. Boards have been doing this a long time.

Module parameters are considered bad. You should only do it if you
have no other option. Here you do have another options, so it is going
to be a hard sell getting David to access your patch.

You will have more success by adding a call to
eth_platform_get_mac_address() to the e1000e driver.

   Andrew

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