linux-kernel - Re: [PATCH] pch_gbe: Use a randomly generated MAC instead of failing probe

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Message-ID: <CANKRQnge1n4M7W5xCqwyGzXp8J3eK1HbZVRqGW7BoE5iOwYCDQ@mail.gmail.com>
Date:	Mon, 16 Jan 2012 16:38:23 +0900
From:	Tomoya MORINAGA <tomoya.rohm@...il.com>
To:	Darren Hart <dvhart@...ux.intel.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, arjan@...ux.intel.com,
	alan@...ux.intel.com, jeffrey.t.kirsher@...el.com,
	paul.gortmaker@...driver.com, jdmason@...zu.us,
	netdev@...r.kernel.org
Subject: Re: [PATCH] pch_gbe: Use a randomly generated MAC instead of failing probe

2012/1/16 Darren Hart <darren.hart@...el.com>:
> I have since resolved this particular issue. I did not disable the
> pcieqos driver I forward ported. With that disabled, pch_phub works as
> expected.
Yes, you can not use both pcieqos and pch_phub at the same time.
Because pcieqos is previous version of pch_phub which is upstreamed.


> Which is to say it lists pch_mac, reads all 0's, and does
> nothing on write (since the MAC ROM doesn't exist). Please see the patch
> thread from Friday to address this using a random mac if the ROM is
> missing or invalid.
Saving MAC address into external ROM is generic method, I think.
Though I know the ROM-less system using eg20t-pch, however I think
this system is not common.
So, I think pch_gbe shouldn't have auto-mac address assignment.

BTW, as you know, a use can write MAC address using sysfs file system
like below.
echo aa:bb:cc:dd:ee:ff > pch_mac

thanks,
tomoya
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