linux-kernel - Ghost EDD devices in /sys again

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Date:	Fri, 5 Sep 2008 22:19:43 +0400
From:	Andrey Borzenkov <arvidjaar@...mail.ru>
To:	hpa@...or.com, Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Ghost EDD devices in /sys again

This is regression but old enough. Apparently I had for whatever reasons
EDD turned off till recently. This is 2.6.27-rc5 just in case.

In 2006 I fixed ghost devices due to buggy BIOS:

http://marc.info/?l=linux-kernel&m=114087765422490&w=2

Later edd.S has been rewritten in C, and apparently this patch has been
lost:

{pts/1}% ls /sys/firmware/edd
int13_dev80/  int13_dev84/  int13_dev88/  int13_dev8c/
int13_dev81/  int13_dev85/  int13_dev89/  int13_dev8d/
int13_dev82/  int13_dev86/  int13_dev8a/  int13_dev8e/
int13_dev83/  int13_dev87/  int13_dev8b/  int13_dev8f/

But I have just a single disk. This is the same system BTW.

Unfortunately I do not speak asm language of C; if somebody could provide
equivalent fix for current edd.c, I am more than ready to test it.

Thank you

-andrey

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