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authorRafael J. Wysocki <rjw@sisk.pl>2008-02-23 13:13:25 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-23 13:40:04 -0500
commit3a2d5b700132f35401f1d9e22fe3c2cab02c2549 (patch)
treead991428c41aee92a5f78b06bf73430af0e6f7ae /drivers/macintosh
parent39273b58a409cd6d65c9732bdca00bacd1626672 (diff)
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 <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Tested-by: Jeff Chua <jeff.chua.linux@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/macintosh')
-rw-r--r--drivers/macintosh/mediabay.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/macintosh/mediabay.c b/drivers/macintosh/mediabay.c
index 51a112815f46..bd8a1d14b45d 100644
--- a/drivers/macintosh/mediabay.c
+++ b/drivers/macintosh/mediabay.c
@@ -698,7 +698,8 @@ static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state)
698{ 698{
699 struct media_bay_info *bay = macio_get_drvdata(mdev); 699 struct media_bay_info *bay = macio_get_drvdata(mdev);
700 700
701 if (state.event != mdev->ofdev.dev.power.power_state.event && state.event == PM_EVENT_SUSPEND) { 701 if (state.event != mdev->ofdev.dev.power.power_state.event
702 && (state.event & PM_EVENT_SLEEP)) {
702 down(&bay->lock); 703 down(&bay->lock);
703 bay->sleeping = 1; 704 bay->sleeping = 1;
704 set_mb_power(bay, 0); 705 set_mb_power(bay, 0);