ACPI: introduce helper function acpi_has_method()

Introduce helper function acpi_has_method() and use it in a number
of places to simplify code.

[rjw: Changelog]
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 3322b47ab7ca..b7201fc6f1e1 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -505,14 +505,12 @@ int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
                            void *preproc_data)
 {
         struct res_proc_context c;
-        acpi_handle not_used;
         acpi_status status;
 
         if (!adev || !adev->handle || !list_empty(list))
                 return -EINVAL;
 
-        status = acpi_get_handle(adev->handle, METHOD_NAME__CRS, &not_used);
-        if (ACPI_FAILURE(status))
+        if (!acpi_has_method(adev->handle, METHOD_NAME__CRS))
                 return 0;
 
         c.list = list;