[PATCH v3 5/7] surface: surface3_power: Drop redundant acpi_bus_get_device() call

["Rafael J. Wysocki" <rjw@rjwysocki.net>]

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

If the ACPI companion of a given device is not present, the result
of the ACPI_HANDLE() evaluation for it will be NULL, so calling
acpi_bus_get_device() on ACPI_HANDLE() result in order to validate
it is redundant.

Drop the redundant acpi_bus_get_device() call from mshw0011_notify()
along with a local variable related to it.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com>
---

v2 -> v3:
   * Resend with a different From and S-o-b address and with R-by from
     Maximilian.  No other changes.

---
 drivers/platform/surface/surface3_power.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Index: linux-pm/drivers/platform/surface/surface3_power.c
===================================================================
--- linux-pm.orig/drivers/platform/surface/surface3_power.c
+++ linux-pm/drivers/platform/surface/surface3_power.c
@@ -159,12 +159,11 @@ mshw0011_notify(struct mshw0011_data *cd
 		unsigned int *ret_value)
 {
 	union acpi_object *obj;
-	struct acpi_device *adev;
 	acpi_handle handle;
 	unsigned int i;
 
 	handle = ACPI_HANDLE(&cdata->adp1->dev);
-	if (!handle || acpi_bus_get_device(handle, &adev))
+	if (!handle)
 		return -ENODEV;
 
 	obj = acpi_evaluate_dsm_typed(handle, &mshw0011_guid, arg1, arg2, NULL,