libata: zpodd: eliminate odd_can_poweroff

Now that we can directly get the ACPI device conterpart of the physical
ATA transport device, the odd_can_poweroff can be eliminated.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/drivers/ata/libata-zpodd.c b/drivers/ata/libata-zpodd.c
index 88949c6..f3a65a3 100644 (file)
--- a/drivers/ata/libata-zpodd.c
+++ b/drivers/ata/libata-zpodd.c
@@ -85,21 +85,6 @@ static enum odd_mech_type zpodd_get_mech_type(struct ata_device *dev)
                return ODD_MECH_TYPE_UNSUPPORTED;
 }
 
-static bool odd_can_poweroff(struct ata_device *ata_dev)
-{
-       acpi_handle handle;
-       struct acpi_device *acpi_dev;
-
-       handle = ata_dev_acpi_handle(ata_dev);
-       if (!handle)
-               return false;
-
-       if (acpi_bus_get_device(handle, &acpi_dev))
-               return false;
-
-       return acpi_device_can_poweroff(acpi_dev);
-}
-
 /* Test if ODD is zero power ready by sense code */
 static bool zpready(struct ata_device *dev)
 {
@@ -267,13 +252,11 @@ static void ata_acpi_remove_pm_notifier(struct ata_device *dev)
 
 void zpodd_init(struct ata_device *dev)
 {
+       struct acpi_device *adev = ACPI_COMPANION(&dev->tdev);
        enum odd_mech_type mech_type;
        struct zpodd *zpodd;
 
-       if (dev->zpodd)
-               return;
-
-       if (!odd_can_poweroff(dev))
+       if (dev->zpodd || !adev || !acpi_device_can_poweroff(adev))
                return;
 
        mech_type = zpodd_get_mech_type(dev);