intel-smartconnect: convert acpi_evaluate_object() to acpi_evaluate_integer()

acpi_evaluate_integer() is an ACPI API introduced to evaluate an
ACPI control method that is known to have an integer return value.
This API can simplify the code because the calling function does not need to
use the specified acpi_buffer structure required by acpi_evaluate_object();

Convert acpi_evaluate_object() to acpi_evaluate_integer()
in drivers/platform/x86/intel-smartconnect.c in this patch.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
CC: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 3 insertions, 13 deletions

diff --git a/drivers/platform/x86/intel-smartconnect.c b/drivers/platform/x86/intel-smartconnect.c
index 898400865f40..1838400dc036 100644
--- a/drivers/platform/x86/intel-smartconnect.c
+++ b/drivers/platform/x86/intel-smartconnect.c
@@ -25,28 +25,18 @@ MODULE_LICENSE("GPL");
 
 static int smartconnect_acpi_init(struct acpi_device *acpi)
 {
-        struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
-        union acpi_object *result;
+        unsigned long long value;
         acpi_status status;
 
-        status = acpi_evaluate_object(acpi->handle, "GAOS", NULL, &output);
+        status = acpi_evaluate_integer(acpi->handle, "GAOS", NULL, &value);
         if (!ACPI_SUCCESS(status))
                 return -EINVAL;
 
-        result = output.pointer;
-
-        if (result->type != ACPI_TYPE_INTEGER) {
-                kfree(result);
-                return -EINVAL;
-        }
-
-        if (result->integer.value & 0x1) {
+        if (value & 0x1) {
                 dev_info(&acpi->dev, "Disabling Intel Smart Connect\n");
                 status = acpi_execute_simple_method(acpi->handle, "SAOS", 0);
         }
 
-        kfree(result);
-
         return 0;
 }