linux-kernel - [PATCH 0/3] ACPI / PM: Make ACPI-based PCI wakeup work for the "freeze" sleep state

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Date:	Tue, 22 Jul 2014 03:23:29 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Linux PCI <linux-pci@...r.kernel.org>,
	Zhang Rui <rui.zhang@...el.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH 0/3] ACPI / PM: Make ACPI-based PCI wakeup work for the "freeze" sleep state

On Saturday, July 19, 2014 10:36:53 PM Rafael J. Wysocki wrote:
> Hi,
> 
> As per the subject, this is to make ACPI-based PCI wakeup (such as WoL on some
> systems among other things) work with the "freeze" sleep state.  For this
> purpose ACPI wakeup GPEs need to be enabled for wakeup devices before
> freeze_enter() is called and it is best to do that when configuring devices
> for wakeup.
> 
> [1/2] Always enable wakeup GPEs when configuring devices for wakeup
> [2/2] Rename one static function to avoid possible future confusion
> 
> Thanks!

That turned out to be more challenging than I had thought initially.

The last version I sent was almost OK, but it had some issues (like it could
walk the PCI hierarchy before resuming any PCI devices during system resume),
so a new version follows.  I did my best to avoid introducing any new problems
with it, but I obviously might overlook something.

It works for me and doesn't seem to break anything as far as I can say.

[1/3] Make PM workqueue available for CONFIG_PM_RUNTIME unset.
[2/3] Rework the handling of ACPI device wakeup notifications.
[3/3] Enable wakeup GPEs while setting up devices for wakeup during system
      suspend too.

Thanks!

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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