From 3130497f5babd42b24a7febda46b46116e0adc83 Mon Sep 17 00:00:00 2001
From: "Li, Aubrey" <aubrey.li@linux.intel.com>
Date: Sun, 2 Mar 2014 08:53:57 +0800
Subject: [PATCH] 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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