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| author | Li, Aubrey <aubrey.li@linux.intel.com> | 2014-03-02 08:53:57 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-03-03 00:21:14 +0100 |
| commit | 3130497f5babd42b24a7febda46b46116e0adc83 (patch) | |
| tree | 3e70fd441ef9fd16ed23db14aab063bbb8684aae /drivers/acpi/sleep.c | |
| parent | cfbf8d4857c26a8a307fb7cd258074c9dcd8c691 (diff) | |
| download | linux-3130497f5babd42b24a7febda46b46116e0adc83.tar.bz2 | |
ACPI / sleep: pm_power_off needs more sanity checks to be installed
Sleep control and status registers need santity checks as well before
ACPI installs acpi_power_off to pm_power_off hook. The checking code in
acpi_enter_sleep_state() is too late, we should not allow a not-working
pm_power_off function to be hooked up.
Signed-off-by: Aubrey Li <aubrey.li@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/sleep.c')
| -rw-r--r-- | drivers/acpi/sleep.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index b718806657cd..b0f6c4a2a119 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -807,7 +807,12 @@ int __init acpi_sleep_init(void) acpi_sleep_hibernate_setup(); status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); - if (ACPI_SUCCESS(status)) { + /* + * Check both ACPI S5 object and ACPI sleep registers to + * install pm_power_off_prepare/pm_power_off hook + */ + if (ACPI_SUCCESS(status) && acpi_gbl_FADT.sleep_control.address + && acpi_gbl_FADT.sleep_status.address) { sleep_states[ACPI_STATE_S5] = 1; pm_power_off_prepare = acpi_power_off_prepare; pm_power_off = acpi_power_off; |