linux-kernel - Re: [PATCH 2/3] e1000e: Useset_memory_ro()/set_memory

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Message-ID: <48DA1B95.5030806@s5r6.in-berlin.de>
Date:	Wed, 24 Sep 2008 12:51:01 +0200
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	David Miller <davem@...emloft.net>
CC:	jkosina@...e.cz, jeffrey.t.kirsher@...el.com, jeff@...zik.org,
	mingo@...e.hu, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, jesse.brandeburg@...el.com,
	john.ronciak@...el.com, bruce.w.allan@...el.com
Subject: Re: [PATCH 2/3] e1000e: Useset_memory_ro()/set_memory_rw() to protect
 flash memory

David Miller wrote:
> From: Jiri Kosina <jkosina@...e.cz>
> Date: Wed, 24 Sep 2008 01:45:53 +0200 (CEST)
> 
>> Yes, probably not a vanilla kernel material, but could be very well used 
>> for testing to further isolate whether it is kernel or userspace 
>> corrupting the memory mapped eeprom.
> 
> Absolutely.

Would it help and would it be feasible to drastically shorten the 
lifetime of the MMIO mapping?  I.e. only have it mapped briefly during 
the driver probe, and temporarily whenever a userspace tool like ethtool 
needs it.
-- 
Stefan Richter
-=====-==--- =--= ==---
http://arcgraph.de/sr/
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