linux-kernel - Re: [PATCH] acpi: remove length check for large registers

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Message-ID: <20130315211845.GD10730@oranje.fc.hp.com>
Date:	Fri, 15 Mar 2013 15:18:45 -0600
From:	Linn Crosetto <linn@...com>
To:	"Moore, Robert" <robert.moore@...el.com>
Cc:	"rjw@...k.pl" <rjw@...k.pl>,
	"ming.m.lin@...el.com" <ming.m.lin@...el.com>,
	"Zheng, Lv" <lv.zheng@...el.com>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] acpi: remove length check for large registers

On Fri, Mar 15, 2013 at 08:50:45PM +0000, Moore, Robert wrote:
> Can you explain in a bit more detail what brings this up?
> 
> I'm aware of the limitation of the generic address structure, but we are forced by the (current) ACPI specification to use it if it is present for a given register.

A system with a GPE block bit_width of 256 triggers it. In this case, the length
check can never succeed.

Thanks,
Linn
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