i915: intel_acpi: convert acpi_get_handle() to acpi_has_method()

acpi_has_method() is a new ACPI API introduced to check
the existence of an ACPI control method.

It can be used to replace acpi_get_handle() in the case that
1. the calling function doesn't need the ACPI handle of the control method.
and
2. the calling function doesn't care the reason why the method is unavailable.

Convert acpi_get_handle() to acpi_has_method()
in drivers/gpu/drm/i915/intel_acpi.c in this patch.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_acpi.c b/drivers/gpu/drm/i915/intel_acpi.c
index 57fe1ae32a0d69d767eb7d698cfeab2ead4231e2..43959edd4291193a538449c1d4f75bba8d30ea8a 100644 (file)
--- a/drivers/gpu/drm/i915/intel_acpi.c
+++ b/drivers/gpu/drm/i915/intel_acpi.c
@@ -193,16 +193,14 @@ out:
 
 static bool intel_dsm_pci_probe(struct pci_dev *pdev)
 {
-       acpi_handle dhandle, intel_handle;
-       acpi_status status;
+       acpi_handle dhandle;
        int ret;
 
        dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
        if (!dhandle)
                return false;
 
-       status = acpi_get_handle(dhandle, "_DSM", &intel_handle);
-       if (ACPI_FAILURE(status)) {
+       if (!acpi_has_method(dhandle, "_DSM")) {
                DRM_DEBUG_KMS("no _DSM method for intel device\n");
                return false;
        }