linux-kernel - Re: [RESEND] [PATCH] atl1: relax eeprom mac address error check

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Message-ID: <4858806D.3070009@garzik.org>
Date:	Tue, 17 Jun 2008 23:26:37 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Jay Cliburn <jacliburn@...lsouth.net>
CC:	advantis@....net, csnook@...hat.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RESEND] [PATCH] atl1: relax eeprom mac address error check

Jay Cliburn wrote:
> From: Radu Cristescu <advantis@....net>
> 
> The atl1 driver tries to determine the MAC address thusly:
> 
> 	- If an EEPROM exists, read the MAC address from EEPROM and
> 	  validate it.
> 	- If an EEPROM doesn't exist, try to read a MAC address from
> 	  SPI flash.
> 	- If that fails, try to read a MAC address directly from the
> 	  MAC Station Address register.
> 	- If that fails, assign a random MAC address provided by the
> 	  kernel.
> 
> We now have a report of a system fitted with an EEPROM containing all
> zeros where we expect the MAC address to be, and we currently handle
> this as an error condition.  Turns out, on this system the BIOS writes
> a valid MAC address to the NIC's MAC Station Address register, but we
> never try to read it because we return an error when we find the all-
> zeros address in EEPROM.
> 
> This patch relaxes the error check and continues looking for a MAC
> address even if it finds an illegal one in EEPROM.
> 
> Signed-off-by: Radu Cristescu <advantis@....net>
> Signed-off-by: Jay Cliburn <jacliburn@...lsouth.net>
> ---
>  drivers/net/atlx/atl1.c |    1 -
>  1 files changed, 0 insertions(+), 1 deletions(-)

applied


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