linux-kernel - Re: [patch 51/57] ACPI: Ingore the RESET_REG_SUP bit when using ACPI reset mechanism

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Date:	Tue, 4 Nov 2008 17:02:05 -0800
From:	Greg KH <gregkh@...e.de>
To:	Zhao Yakui <yakui.zhao@...el.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...nel.org" <stable@...nel.org>,
	Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	Theodore Ts'o <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	Domenico Andreoli <cavokz@...il.com>, Willy Tarreau <w@....eu>,
	Rodrigo Rubira Branco <rbranco@...checkpoint.com>,
	Jake Edge <jake@....net>, Eugene Teo <eteo@...hat.com>,
	"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"alan@...rguk.ukuu.org.uk" <alan@...rguk.ukuu.org.uk>,
	"Brown, Len" <len.brown@...el.com>
Subject: Re: [patch 51/57] ACPI: Ingore the RESET_REG_SUP bit when using
	ACPI reset mechanism

On Wed, Nov 05, 2008 at 08:48:12AM +0800, Zhao Yakui wrote:
> On Wed, 2008-11-05 at 07:33 +0800, Greg KH wrote:
> > 2.6.27-stable review patch.  If anyone has any objections, please let us know.
> Please don't apply this patch.And this causes the reboot regression on
> AMD chipset. (Bug11942)
>     Now the default reboot type is changed from BOOT_KBD to BOOT_ACPI.
>       
> On the AMD box there exists the definition of RESET_REG &RESET_VALUE,
> which is identical to the definition in Intel Chipset. After the
> RESET_REG_SUP is ignored, the AMD box can't be rebooted by writing the
> RESET_VALUE to RESET_REG I/O port.

Was there a follow-on patch that fixes the regression that has gone into
Linus's tree?  If so, wouldn't it be better to apply that as well?

Len, what do you advise here?

thanks,

greg k-h
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