linux-kernel - Re: [PATCH] PCI: Remove not needed check in disable aspm link

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Date:	Fri, 14 Jun 2013 22:48:13 +0000
From:	Matthew Garrett <matthew.garrett@...ula.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Roman Yepishev <roman.yepishev@...il.com>,
	Jiang Liu <jiang.liu@...wei.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Maxim Levitsky <maximlevitsky@...il.com>,
	Jussi Kivilinna <jussi.kivilinna@....fi>
Subject: Re: [PATCH] PCI: Remove not needed check in disable aspm link

On Fri, 2013-06-14 at 15:40 -0700, Yinghai Lu wrote:
> On Fri, Jun 14, 2013 at 3:27 PM, Matthew Garrett
> <matthew.garrett@...ula.com> wrote:
> > On Fri, 2013-06-14 at 15:17 -0700, Yinghai Lu wrote:
> >
> >> after those two patches, it aspm_disabled is set, via _osc early,
> >> pre-1.1 devices aspm register will be touched even aspm_force is not specified.
> >
> > I don't follow. We were previously automatically disabling ASPM on
> > pre-1.1 devices even if _OSC didn't give us control.
> 
> I don't think so, we just moved _OSC support/control setting before pci scan
> in 3.8 and revert that in v3.9.

Right, sorry, I don't mean _OSC, I mean the FADT flag. We were
previously automatically disabling ASPM on pre-1.1 devices even if the
FADT flag was set.

-- 
Matthew Garrett | mjg59@...f.ucam.org