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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2007-10-02 22:24:08 +0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-10-10 06:23:09 +0200 |
| commit | 8a0bb7362587807fec985f72fb0317aa8ed24835 (patch) | |
| tree | a7ca52aeb218b5207349d93ffcf1fec49356bdb9 /drivers/acpi/sleep | |
| parent | Linux 2.6.23 (diff) | |
| download | linux-8a0bb7362587807fec985f72fb0317aa8ed24835.tar.xz linux-8a0bb7362587807fec985f72fb0317aa8ed24835.zip | |
Hibernation: Make sure that ACPI is enabled in acpi_hibernation_finish
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@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/sleep')
| -rw-r--r-- | drivers/acpi/sleep/main.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c index 2cbb9aabd00e..caf8721ae6fb 100644 --- a/drivers/acpi/sleep/main.c +++ b/drivers/acpi/sleep/main.c @@ -256,6 +256,11 @@ 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); |