linux-kernel - Re: [PATCH] PCI / PCIe: Clear Root PME Status bits during early resume

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 19 Dec 2010 13:54:47 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Matthew Wilcox <matthew@....cx>
Cc:	linux-pci@...r.kernel.org, Jesse Barnes <jbarnes@...tuousgeek.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Linux-pm mailing list" <linux-pm@...ts.linux-foundation.org>
Subject: Re: [PATCH] PCI / PCIe: Clear Root PME Status bits during early resume

On Sunday, December 19, 2010, Rafael J. Wysocki wrote:
> On Sunday, December 19, 2010, Rafael J. Wysocki wrote:
> > On Sunday, December 19, 2010, Matthew Wilcox wrote:
> > > On Sun, Dec 19, 2010 at 11:49:40AM +0100, Rafael J. Wysocki wrote:
> > > > in pci_pm_default_resume_early() and not in the port's resume
> > > > routine, because it's generally necessary even if the PCI Express
> > > > port driver is not used).
> > > 
> > > We should make it impossible to not use the PCIe port driver.
> > 
> > Actually, that's not correct.  In some cases (e.g. _OSI doesn't allow us
> 
> That should have been _OSC(), sorry.
> 
> > to use PCIe native services), we simply can't use it (because it is unsafe
> > and leads to serious problems).

Well, in fact, scratch that.  We can make it do nothing except for an early
resume routine doing the clearing of the Root PME Status bit in that cases.

I'll rework the patch in that direction.

Thanks,
Rafael
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/