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>
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@ -807,7 +807,12 @@ int __init acpi_sleep_init(void)
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acpi_sleep_hibernate_setup();
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status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
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if (ACPI_SUCCESS(status)) {
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/*
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* Check both ACPI S5 object and ACPI sleep registers to
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* install pm_power_off_prepare/pm_power_off hook
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*/
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if (ACPI_SUCCESS(status) && acpi_gbl_FADT.sleep_control.address
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&& acpi_gbl_FADT.sleep_status.address) {
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sleep_states[ACPI_STATE_S5] = 1;
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pm_power_off_prepare = acpi_power_off_prepare;
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pm_power_off = acpi_power_off;
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