linux-kernel - [PATCH 5/6] PM: Allow ACPI devices to suspend/resume asynchronously

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Message-Id: <200908262223.28899.rjw@sisk.pl>
Date:	Wed, 26 Aug 2009 22:23:28 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	"linux-pm" <linux-pm@...ts.linux-foundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, Len Brown <lenb@...nel.org>,
	Pavel Machek <pavel@....cz>,
	Alan Stern <stern@...land.harvard.edu>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Zhang Rui <rui.zhang@...el.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Linux PCI <linux-pci@...r.kernel.org>
Subject: [PATCH 5/6] PM: Allow ACPI devices to suspend/resume asynchronously

From: Rafael J. Wysocki <rjw@...k.pl>

Set async_suspend for all ACPI devices, so that they can be suspended
and resumed asynchronously with other devices they don't depend on in
a known way (i.e. devices which are not their parents or children and
to which they are not connected via struct pm_link objects).

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 drivers/acpi/scan.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-2.6/drivers/acpi/scan.c
===================================================================
--- linux-2.6.orig/drivers/acpi/scan.c
+++ linux-2.6/drivers/acpi/scan.c
@@ -539,6 +539,7 @@ static int acpi_device_register(struct a
 		       dev_name(&device->dev));
 
 	device->removal_type = ACPI_BUS_REMOVAL_NORMAL;
+	device_enable_async_suspend(&device->dev, true);
 	return 0;
 end:
 	mutex_lock(&acpi_device_lock);

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