ide: hook ACPI _PSx method to IDE power on/off

ACPI spec defines the sequence of IDE power on/off:
Powering down:
	Call _GTM.
	Power down drive (calls _PS3 method and turns off power planes).
Powering up:
	Power up drive (calls _PS0 method if present and turns on power planes).
	Call _STM passing info from _GTM (possibly modified), with ID data from
	each drive.
	Initialize the channel.
	May modify the results of _GTF.
	For each drive:
		Call _GTF.
		Execute task file (possibly modified).
This patch adds the missed _PS0/_PS3 methods call.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 9ba778a2b484..feab124d8e05 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -262,10 +262,12 @@ int acpi_bus_set_power(acpi_handle handle, int state)
                 printk(KERN_WARNING PREFIX
                               "Transitioning device [%s] to D%d\n",
                               device->pnp.bus_id, state);
-        else
+        else {
+                device->power.state = state;
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                   "Device [%s] transitioned to D%d\n",
                                   device->pnp.bus_id, state));
+        }
 
         return result;
 }