linux/kernel/power
Rafael J. Wysocki 3a2d5b7001 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>
2008-02-23 10:40:04 -08:00
..
Kconfig PM: documentation cleanups 2008-02-07 01:27:17 -05:00
Makefile Introduce CONFIG_SUSPEND for suspend-to-Ram and standby 2007-07-29 16:45:38 -07:00
console.c [PATCH] swsusp: fix suspend when console is in VT_AUTO+KD_GRAPHICS mode 2007-03-16 19:25:05 -07:00
disk.c PM: Introduce PM_EVENT_HIBERNATE callback state 2008-02-23 10:40:04 -08:00
main.c Suspend: Invoke suspend notifications after console switch 2008-02-01 18:30:58 -05:00
pm.c PM: ACPI and APM must not be enabled at the same time 2008-01-11 12:26:47 -05:00
power.h Suspend: Add config option to disable the freezer if architecture wants that 2008-02-01 18:30:58 -05:00
poweroff.c WorkStruct: Pass the work_struct pointer instead of context data 2006-11-22 14:55:48 +00:00
process.c power: Use task_is_* 2007-12-06 17:34:47 -05:00
snapshot.c Hibernation: Handle DEBUG_PAGEALLOC on x86 2008-02-21 02:15:28 -05:00
swap.c Hibernation: Update messages 2008-02-01 18:30:55 -05:00
swsusp.c Hibernation: Update messages 2008-02-01 18:30:55 -05:00
user.c Hibernation: Add PM_RESTORE_PREPARE and PM_POST_RESTORE notifiers (rev. 2) 2008-02-01 18:30:53 -05:00