Date: Tue, 13 May 2003 15:03:54 +0100
From: Dave Jones <davej@codemonkey.org.uk>
To: john stultz <johnstul@us.ibm.com>
Cc: lkml <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@digeo.com>,
       Alan Cox <alan@lxorguk.ukuu.org.uk>, James <jamesclv@us.ibm.com>
Subject: Re: [PATCH] linux-2.5.69_clear-smi-fix_A1
Message-ID: <20030513140354.GB676@suse.de>
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	john stultz <johnstul@us.ibm.com>,
	lkml <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@digeo.com>,
	Alan Cox <alan@lxorguk.ukuu.org.uk>, James <jamesclv@us.ibm.com>
References: <1052785802.4169.12.camel@w-jstultz2.beaverton.ibm.com>
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On Mon, May 12, 2003 at 05:30:03PM -0700, john stultz wrote:

 > 	I've been having problems with ACPI on a box here in our lab. Some of
 > our more recent hardware requires that SMIs are routed through the
 > IOAPIC, thus when we clear_IO_APIC() at boot time, we clear the BIOS
 > initialized SMI pin. This basically clobbers the SMI so we can then
 > never make the transition into ACPI mode. 
 > 
 > This patch simply reads the apic entry in clear_IO_APIC to make sure the
 > delivery_mode isn't dest_SMI. If it is, we leave the apic entry alone
 > and return.
 > 
 > With this patch, the box boots and SMIs function properly.

There's a whole bunch of 'ACPI buggers up interrupt routing' bugs
in bugzilla right now, I wonder if this could help out with those.

		Dave

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