linux-kernel - Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops

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Date:	Mon, 17 Dec 2007 00:03:01 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Pavel Machek <pavel@....cz>
Cc:	Ingo Molnar <mingo@...e.hu>, unlisted-recipients: no@...is.elte.hu,
	To-header@...is.elte.hu, on@...is.elte.hu, "input <"@elvis.elte.hu,
	; Rene Herman <rene.herman@...access.nl>,
	Paul Rolland <rol@...917.net>,
	"H. Peter Anvin" <hpa@...or.com>, Krzysztof Halasa <khc@...waw.pl>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, rol@...be.net
Subject: Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64
 with MCP51 laptops

On Sun, 16 Dec 2007 22:26:33 +0100
Pavel Machek <pavel@....cz> wrote:

> On Fri 2007-12-14 15:33:28, Ingo Molnar wrote:
> > 
> > * Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
> > 
> > > There is another reason we can't just do a dumb changeover - two 
> > > actually
> > > 
> > > #1: Some drivers are using inb_p/outb_p in PCI cases which are going 
> > > #to cause PCI posting changes. Most are probably just wrong in the 
> > > #first place but they need hand checking
> > 
> > hm, any intelligent way to force PCI posting? I guess not.
> > 
> > here's a list of candidate drivers (match the out*_p() pattern and do 
> > pci)
> > 
> > ./char/epca.c 
> > ./char/sonypi.c
> > ./scsi/megaraid.c
> > ./ide/pci/serverworks.c
> > ./ide/pci/cmd640.c
> > ./input/mouse/pc110pad.c

You are missing some watchdogs at least ?
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