ACPI / video: skip evaluating _DOD when it does not exist
Some system supports hybrid graphics and its discrete VGA
does not have any connectors and therefore has no _DOD method.
Signed-off-by: Alex Hung <alex.hung@canonical.com>
Reviewed-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c
index c1d138e..c5557d0 100644
--- a/drivers/acpi/acpi_video.c
+++ b/drivers/acpi/acpi_video.c
@@ -1246,6 +1246,9 @@
union acpi_object *dod = NULL;
union acpi_object *obj;
+ if (!video->cap._DOD)
+ return AE_NOT_EXIST;
+
status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
if (!ACPI_SUCCESS(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));