linux-kernel - Re: [PATCH] Ghost EDD devices in /sys again

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Message-ID: <48C28DE7.8030302@zytor.com>
Date:	Sat, 06 Sep 2008 07:04:23 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andrey Borzenkov <arvidjaar@...mail.ru>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Ghost EDD devices in /sys again

Andrey Borzenkov wrote:
> 
> Was it really that simple?
> 
> Subject: [PATCH] Fix ghost devices under /sys/firmware/edd
> From: Andrey Borzenkov <arvidjaar@...l.ru>
> 
> Some BIOSes do not always set CF on error before return from int13.
> The patch adds additional check for status being zero (AH == 0).
> 

Do you have any evidence that there aren't any BIOSes which leave AH != 
0 on legitimate success?  If so, you have turned a nuisance bug into 
something that could cause install failures.

	-hpa
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