linux-kernel - Re: [PATCH 3/3] ACPI: Bug compatibility for Windows on the ACPI reboot vector

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Message-ID: <4D0159EA.90303@zytor.com>
Date:	Thu, 09 Dec 2010 14:36:26 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matthew Garrett <mjg@...hat.com>
CC:	x86@...nel.org, linux-acpi@...r.kernel.org, lenb@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] ACPI: Bug compatibility for Windows on the ACPI reboot
 vector

On 12/09/2010 01:46 PM, Matthew Garrett wrote:
> Windows ignores the bit_offset and bit_width, despite the spec requiring
> that they be validated. Drop the checks so that we match this behaviour.
> Windows also goes straight for the keyboard controller if the ACPI reboot
> fails, so we shouldn't sleep if we're still alive.
>
> Signed-off-by: Matthew Garrett<mjg@...hat.com>

Be careful: the goal isn't bug-compatibility with Windows, the goal is 
to work on the maximum number of systems.  Bug-compatibility with 
Windows *may* be a way to that goal, but it is not a guarantee, since 
Windows doesn't get validated against older systems that went through 
WHQL under an earlier version of Windows.

	-hpa
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