From: Matthew Garrett <mjg59@srcf.ucam.org>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
jbarnes@virtuousgeek.org
Subject: Re: [PATCH] PCI: Disable ASPM if BIOS asks us to
Date: Thu, 2 Dec 2010 22:55:11 +0000 [thread overview]
Message-ID: <20101202225511.GA13040@srcf.ucam.org> (raw)
In-Reply-To: <201012022351.39815.rjw@sisk.pl>
On Thu, Dec 02, 2010 at 11:51:39PM +0100, Rafael J. Wysocki wrote:
> On Thursday, December 02, 2010, Matthew Garrett wrote:
> > On Thu, Dec 02, 2010 at 11:24:31PM +0100, Rafael J. Wysocki wrote:
> > > > + if (!aspm_force) {
> > > > aspm_disabled = 1;
> > > > + if (clear)
> > > > + aspm_clear_state = clear;
> > >
> > > Well, is the if(clear) really necessary?
> >
> > If the FADT disables ASPM, and then we fail to get the control bits,
> > we'd call this twice and turn off aspm_clear_state.
>
> Ah, thanks. So if you used a separate function for handling the "BIOS tells
> us there's no ASPM" case, that wouldn't be necessary? ;-)
Yeah. I'll rework and resend - I've also figured out that we need to
clear the common PM bit.
--
Matthew Garrett | mjg59@srcf.ucam.org
prev parent reply other threads:[~2010-12-02 22:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-02 21:55 [PATCH] PCI: Disable ASPM if BIOS asks us to Matthew Garrett
2010-12-02 22:24 ` Rafael J. Wysocki
2010-12-02 22:31 ` Matthew Garrett
2010-12-02 22:51 ` Rafael J. Wysocki
2010-12-02 22:55 ` Matthew Garrett [this message]
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