linux-kernel - Re: [Bug #11382] e1000e: 2.6.27-rc1 corrupts EEPROM/NVM

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Date:	Thu, 25 Sep 2008 21:23:11 +0200
From:	Krzysztof Halasa <khc@...waw.pl>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Frans Pop <elendil@...net.nl>, airlied@...il.com,
	Jeff Garzik <jeff@...zik.org>, davem@...emloft.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	jeffrey.t.kirsher@...el.com, david.vrabel@....com, rjw@...k.pl,
	linux-kernel@...r.kernel.org, kernel-testers@...r.kernel.org,
	chrisl@...are.com, Ingo Molnar <mingo@...e.hu>,
	jbarnes@...tuousgeek.org, jesse.brandeburg@...il.com
Subject: Re: [Bug #11382] e1000e: 2.6.27-rc1 corrupts EEPROM/NVM

Jiri Kosina <jkosina@...e.cz> writes:

> Still, what confuses me a little bit -- the EEPROM of the card is set to 
> all 0xff, once the corruption happens. Isn't that a quite a coincidence, 
> that bytes representing "nothing" in this context are used?

Perhaps the entire chip has been erased with the "ERAL" (erase all)
command. Requires previously issued EWEN (erase/write enable).
Each command seems to require several writes to the EEPROM control
register.
-- 
Krzysztof Halasa
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