linux-kernel - [PATCH 4/6] PM: Allow PCI devices to suspend/resume asynchronously

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Message-Id: <200908262222.31789.rjw@sisk.pl>
Date:	Wed, 26 Aug 2009 22:22:31 +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 4/6] PM: Allow PCI devices to suspend/resume asynchronously

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

Set async_suspend for all PCI devices and PCIe port services, 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/pci/pci.c               |    1 +
 drivers/pci/pcie/portdrv_core.c |    1 +
 2 files changed, 2 insertions(+)

Index: linux-2.6/drivers/pci/pci.c
===================================================================
--- linux-2.6.orig/drivers/pci/pci.c
+++ linux-2.6/drivers/pci/pci.c
@@ -1360,6 +1360,7 @@ void pci_pm_init(struct pci_dev *dev)
 	int pm;
 	u16 pmc;
 
+	device_enable_async_suspend(&dev->dev, true);
 	dev->pm_cap = 0;
 
 	/* find PCI PM capability in list */
Index: linux-2.6/drivers/pci/pcie/portdrv_core.c
===================================================================
--- linux-2.6.orig/drivers/pci/pcie/portdrv_core.c
+++ linux-2.6/drivers/pci/pcie/portdrv_core.c
@@ -280,6 +280,7 @@ static void pcie_device_init(struct pci_
 	dev_set_name(device, "%s:pcie%02x",
 		 pci_name(parent), get_descriptor_id(port_type, service_type));
 	device->parent = &parent->dev;
+	device_enable_async_suspend(device, true);
 }
 
 /**

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