Random MAC address on my BeagleBone White

From: moon.linux@yahoo.com (Anand Moon)
To: linux-arm-kernel@lists.infradead.org
Subject: Random MAC address on my BeagleBone White
Date: Sat, 16 Aug 2014 00:02:19 +0530	[thread overview]
Message-ID: <53EE5233.6000605@yahoo.com> (raw)
In-Reply-To: <20140815134221.08c546a0@gandalf.local.home>

Hi Steven,

Please follow the bellow link to set mac address.

http://www.armadeus.com/wiki/index.php?title=Ethernet_MAC_address

-Anand Moon
On 8/15/2014 11:12 PM, Steven Rostedt wrote:
> Hi,
>
> I'm using my BeagleBone White to debug some ftrace code and with the
> help from people like Robert Nelson I was finally able to boot it and
> test my kernel.
>
> But I'm still having some other issues. The most annoying one is that
> the new kernel assigns some random MAC address to my NIC and I can't
> give my board the proper IP address via DHCP.
>
> Seems there was talk about adding this via the device tree, but it was
> rejected because U-Boot can do it. The problem I have is that U-Boot
> doesn't!
>
> I downloaded the latest U-Boot from git://git.denx.de/u-boot.git (Is
> that the right place?) and had to tweak it so that I can boot a kernel
> via tftp and still use the filesystem on the SD card.
>
> When I place the 3.2 kernel that came with the board on my tftp server,
> all works fine. I get the same MAC addr each boot and things just work.
> But if I place the 3.16 kernel that I build on the tftp server, I get
> some random MAC address, and then a dynamic IP to go with it :-(
>
> This is in my dmesg:
>
> [    2.304970] cpsw 4a100000.ethernet: Random MACID = 8a:fc:f5:aa:b6:e1
>
> I can also see in the file arch/arm/boot/dts/am33xx.dtsi:
>
>
>                          cpsw_emac0: slave at 4a100200 {
>                                  /* Filled in by U-Boot */
>                                  mac-address = [ 00 00 00 00 00 00 ];
>                          };
>
> Well, it's not filled in by U-Boot.
>
> My question to all of you is, how do I fix this? I need a static mac
> addr.
>
> One way is that I might have to update that file myself with a temp
> patch, but I think that's a hack and not something worth doing.
>
> What's the proper way to have the board always come up with the same
> MAC addr?
>
> Thanks, this is rather annoying.
>
> -- Steve
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel