ACPI: power: don't cache power resource state

ACPI may change power resource state behind our back, so don't
keep our local copy, which may not be valid.

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index fb2cff9a2d24..fdee82d37b7d 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -198,11 +198,9 @@ int acpi_bus_set_power(acpi_handle handle, int state)
                 return -ENODEV;
         }
         /*
-         * Get device's current power state if it's unknown
-         * This means device power state isn't initialized or previous setting failed
+         * Get device's current power state
          */
-        if ((device->power.state == ACPI_STATE_UNKNOWN) || device->flags.force_power_state)
-                acpi_bus_get_power(device->handle, &device->power.state);
+        acpi_bus_get_power(device->handle, &device->power.state);
         if ((state == device->power.state) && !device->flags.force_power_state) {
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
                                   state));