The patch titled
Hibernation: Make sure that ACPI is enabled in acpi_hibernation_finish
has been added to the -mm tree. Its filename is
hibernation-make-sure-that-acpi-is-enabled-in-acpi_hibernation_finish.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Hibernation: Make sure that ACPI is enabled in acpi_hibernation_finish
From: Rafael J. Wysocki <rjw@xxxxxxx>
If the BIOS does not enable ACPI and the "acpi=off" command line parameter
is passed to the boot kernel, ACPI may be disabled when the (restored)
image kernel attempts to execute acpi_hibernation_finish(). To prevent
this from happening we can call acpi_enable() from
acpi_hibernation_finish() (if ACPI is already enabled, this will have no
effect).
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/sleep/main.c | 5 +++++
1 files changed, 5 insertions(+)
diff -puN drivers/acpi/sleep/main.c~hibernation-make-sure-that-acpi-is-enabled-in-acpi_hibernation_finish drivers/acpi/sleep/main.c
--- a/drivers/acpi/sleep/main.c~hibernation-make-sure-that-acpi-is-enabled-in-acpi_hibernation_finish
+++ a/drivers/acpi/sleep/main.c
@@ -230,6 +230,11 @@ static int acpi_hibernation_enter(void)
static void acpi_hibernation_finish(void)
{
+ /*
+ * If ACPI is not enabled by the BIOS and the boot kernel, we need to
+ * enable it here.
+ */
+ acpi_enable();
acpi_leave_sleep_state(ACPI_STATE_S4);
acpi_disable_wakeup_device(ACPI_STATE_S4);
_
Patches currently in -mm which might be from rjw@xxxxxxx are
pm-fix-dependencies-of-config_suspend-and-config_hibernation-updated-3x.patch
enable-gpes-before-calling-_wak-on-resume.patch
hibernation-make-sure-that-acpi-is-enabled-in-acpi_hibernation_finish.patch
uli526x-add-suspend-and-resume-routines.patch
make-kernel-power-maincsuspend_enter-static.patch
pm-move-definition-of-struct-pm_ops-to-suspendh.patch
pm-rename-struct-pm_ops-and-related-things.patch
pm-rework-struct-platform_suspend_ops.patch
pm-make-suspend_ops-static.patch
pm-rework-struct-hibernation_ops.patch
pm-rename-hibernation_ops-to-platform_hibernation_ops.patch
freezer-document-relationship-with-memory-shrinking.patch
freezer-do-not-sync-filesystems-from-freeze_processes.patch
freezer-prevent-new-tasks-from-inheriting-tif_freeze-set.patch
freezer-introduce-freezer-firendly-waiting-macros.patch
freezer-introduce-freezer-firendly-waiting-macros-fix.patch
freezer-do-not-send-signals-to-kernel-threads.patch
unexport-pm_power_off_prepare.patch
pm_trace-displays-the-wrong-time-from-the-rtc.patch
freezer-be-more-verbose.patch
freezer-use-wait-queue-instead-of-busy-looping.patch
freezer-measure-freezing-time.patch
serial-turn-serial-console-suspend-a-boot-rather-than-compile-time-option.patch
serial-turn-serial-console-suspend-a-boot-rather-than-compile-time-option-update.patch
s2ram-kill-old-debugging-junk.patch
pnp-make-pnpacpi_suspend-handle-errors.patch
shrink_slab-handle-bad-shrinkers.patch
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