netdev - Re: [PATCH 2/2] smsc95xx: allow to re-use MAC address already programmed

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Message-ID: <alpine.DEB.2.01.1202091038580.8085@pmeerw.net>
Date:	Thu, 9 Feb 2012 10:59:36 +0100 (CET)
From:	Peter Meerwald <pmeerw@...erw.net>
To:	David Miller <davem@...emloft.net>
cc:	netdev@...r.kernel.org, danny.kukawka@...ect.de
Subject: Re: [PATCH 2/2] smsc95xx: allow to re-use MAC address already
 programmed

Hello David,

> > patch adds a module parameter which allows to keep the MAC address already 
> > set (e.g. by the boot loader) if it is valid (otherwise the MAC address is read 
> > from an optional EEPROM or randomly generated)

> No way, for the same reason as your other patch.
> Module parameters suck, use something generic.

is there a generic solution (yet)?

the goal is to support tftp-ing a kernel image from u-boot and doing 
a rootnfs mount in the kernel (with the same MAC address)

it was suggested to set the MAC address from userspace/initrd which seems 
to be a lot of overhead

I am aware of Danny Kukawka's work in a similar direction

the embedded approach would probably be to hand some board-specific 
callback to the 'network layer' in order to obtain a MAC whenever it is 
needed; this could replace/supplement random_ether_addr() found in many 
drivers

regards, p.

-- 

Peter Meerwald
+43-664-2444418 (mobile)
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