linux-kernel - Re: PME via interrupt or SCI mechanism?

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Message-Id: <201109291105.38342.rjw@sisk.pl>
Date:	Thu, 29 Sep 2011 11:05:38 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	linux-acpi@...r.kernel.org, linux-pci@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: PME via interrupt or SCI mechanism?

On Thursday, September 29, 2011, Matthew Garrett wrote:
> On Thu, Sep 29, 2011 at 12:21:28AM +0200, Rafael J. Wysocki wrote:
> 
> > Moreover, evidently, the event is signaled and it causes pci_acpi_wake_dev()
> > to be called for multiple devices, _except_ for the xhci_hcd.  Perhaps
> > the notifier is not installed for that device for some reason.
> 
> I suspect that we're just going to end up accepting defeat and having to 
> poll *all* pci devices (including pcie) once a second.

Well, this case actually looks like a subtle bug in ACPICA.  I think we
need to debug it further before deciding anything.

Thanks,
Rafael
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