From 3a2d5b700132f35401f1d9e22fe3c2cab02c2549 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Sat, 23 Feb 2008 19:13:25 +0100 Subject: PM: Introduce PM_EVENT_HIBERNATE callback state During the last step of hibernation in the "platform" mode (with the help of ACPI) we use the suspend code, including the devices' ->suspend() methods, to prepare the system for entering the ACPI S4 system sleep state. But at least for some devices the operations performed by the ->suspend() callback in that case must be different from its operations during regular suspend. For this reason, introduce the new PM event type PM_EVENT_HIBERNATE and pass it to the device drivers' ->suspend() methods during the last phase of hibernation, so that they can distinguish this case and handle it as appropriate. Modify the drivers that handle PM_EVENT_SUSPEND in a special way and need to handle PM_EVENT_HIBERNATE in the same way. These changes are necessary to fix a hibernation regression related to the i915 driver (ref. http://lkml.org/lkml/2008/2/22/488). Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Tested-by: Jeff Chua Signed-off-by: Linus Torvalds --- drivers/ata/ata_piix.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/ata/ata_piix.c') diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c index 752e7d2f3b2f..fae8404254c0 100644 --- a/drivers/ata/ata_piix.c +++ b/drivers/ata/ata_piix.c @@ -1339,7 +1339,7 @@ static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) * cycles and power trying to do something to the sleeping * beauty. */ - if (piix_broken_suspend() && mesg.event == PM_EVENT_SUSPEND) { + if (piix_broken_suspend() && (mesg.event & PM_EVENT_SLEEP)) { pci_save_state(pdev); /* mark its power state as "unknown", since we don't -- cgit v1.2.1