linux-kernel - Re: Random MAC address on my BeagleBone White

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Message-ID: <20140815144120.58597f37@gandalf.local.home>
Date:	Fri, 15 Aug 2014 14:41:20 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Anand Moon <moon.linux@...oo.com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	linaro-kernel@...ts.linaro.org,
	LKML <linux-kernel@...r.kernel.org>,
	Mugunthan V N <mugunthanvnm@...com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Vaibhav Hiremath <hvaibhav@...com>,
	Felipe Balbi <balbi@...com>,
	Markus Pargmann <mpa@...gutronix.de>,
	Robert Nelson <robertcnelson@...il.com>
Subject: Re: Random MAC address on my BeagleBone White

On Sat, 16 Aug 2014 00:02:19 +0530
Anand Moon <moon.linux@...oo.com> wrote:

> Hi Steven,
> 
> Please follow the bellow link to set mac address.
> 
> http://www.armadeus.com/wiki/index.php?title=Ethernet_MAC_address
> 
> -Anand Moon

Hi,

My U-Boot already has a ethaddr defined. It's what is used by the
default kernel that came with the board (3.2).

U-Boot# printenv
[...]
ethaddr=d4:94:a1:8b:ec:78

The problem is that this is ignored by the latest kernel and it
replaces it with some random mac.

Note, I boot via bootp, thus it has to have a mac. That mac is what
tells my dhcp server what kernel image to load this board.

-- Steve

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