linux-toradex.git/kernel/power, branch v2.6.21.4

[PATCH] swsusp: fix memory shrinker

2007-04-05T04:12:47+00:00

Fix a bug in the swsusp's memory shrinker that causes some systems using
highmem to refuse to suspend to disk if image_size is set above 1/2 of
available RAM.

Special thanks to Jiri Slaby for reporting the problem and assistance in
debugging it.

Signed-off-by: Rafael J. Wysocki 
Cc: Jiri Slaby 
Cc: Pavel Machek 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Revert "swsusp: disable nonboot CPUs before entering platform suspend"

2007-03-27T16:20:03+00:00

This reverts commit 94985134b7b46848267ed6b734320db01c974e72 and
insteads removes the WARN_ON() that caused that commit in the first
place.

The problem is that we call disable_nonboot_cpus() in swsusp before
powering down the system in order to avoid triggering the WARN_ON()
in arch/x86_64/kernel/acpi/sleep.c:init_low_mapping() and this doesn't
work well on Thomas' system.

So instead, remove the WARN_ON() in arch/x86_64/kernel/acpi/sleep.c:
init_low_mapping(), which triggers every time during the suspend to disk
in the platform mode, as the potential problem it is related to doesn't
seem to occur in practice.

[ I think we might want to disallow the case of multiple users of that
  mm, or something.  Normally, playing with the current process page
  tables on the current CPU should be fine as long as we don't have
  other threads using those tables at the same time..

  Anyway, not pretty, but better than the warning or the lockup - Linus ]

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Linus Torvalds

[PATCH] fix extra BIOS invocation during resume

2007-03-23T02:39:06+00:00

It causes extra moon icons blinking on x60, and breaks at least two other
systems.

During resume, we do not know that "reboot"/"shutdown" method was used, so
we assume "plaform" and call BIOS, anyway...

This is 2.6.21 material, and should fix 2 or 3 regressions from 2.6.20.

Signed-off-by: Pavel Machek 
Acked-by: "Rafael J. Wysocki" 
Cc: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] swsusp: Fix SNAPSHOT_S2RAM ioctl

2007-03-23T02:39:05+00:00

The SNAPSHOT_S2RAM ioctl does not disable the nonboot CPUs before entering
the suspend, although it should do this.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] swsusp: fix suspend when console is in VT_AUTO+KD_GRAPHICS mode

2007-03-17T02:25:05+00:00

When the console is in VT_AUTO+KD_GRAPHICS mode, switching to the
SUSPEND_CONSOLE fails, resulting in vt_waitactive() waiting indefinitely or
until the task is interrupted.  This patch tests if a console switch can
occur in set_console() and returns early if a console switch is not
possible.

[akpm@linux-foundation.org: cleanup]
Signed-off-by: Andrew Johnson 
Acked-by: Pavel Machek 
Cc: "Antonino A. Daplas" 
Cc: "Rafael J. Wysocki" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] swsusp: disable nonboot CPUs before entering platform suspend

2007-03-17T02:25:03+00:00

Prevent the WARN_ON() in arch/x86_64/kernel/acpi/sleep.c:init_low_mapping()
from triggering by disabling nonboot CPUs before we finally enter the
platform suspend.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] swsusp: Fix resume error path in platform mode

2007-03-17T02:25:03+00:00

If swsusp is using the platform mode during the resume and the image cannot
be read, the platform mode should be switched off before software_resume()
returns.  Make it happen.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] kconfig: Update swsusp description

2007-03-06T17:30:26+00:00

Update the outdated and inaccurate description of the software suspend in
Kconfig.

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

power management: no valid states w/o pm_ops

2007-02-23T22:52:09+00:00

Change /sys/power/state to not advertise any valid states (except for disk
if SOFTWARE_SUSPEND is enabled) when no pm_ops have been set so userspace
can easily discover what states should be available.

Signed-off-by: Johannes Berg 
Cc: "Randy.Dunlap" 
Cc: Rafael J. Wysocki 
Cc: Pavel Macheck 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

[PATCH] swsusp: Change pm_ops handling by userland interface

2007-02-11T18:51:20+00:00

Make the userland interface of swsusp call pm_ops->finish() after
enable_nonboot_cpus() and before resume_device(), as indicated by the recent
discussion on Linux-PM (cf.
http://lists.osdl.org/pipermail/linux-pm/2006-November/004164.html).

This patch changes the SNAPSHOT_PMOPS ioctl so that its first function,
PMOPS_PREPARE, only sets a switch turning the platform suspend mode on, and
its last function, PMOPS_FINISH, only checks if the platform mode is enabled.
This should allow the older userland tools to work with new kernels without
any modifications.

The changes here only affect the userland interface of swsusp.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Cc: Greg KH 
Cc: Nigel Cunningham 
Cc: Patrick Mochel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds