diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c
index cc3c83e4cc23..f97a4dff336e 100644
--- a/drivers/acpi/x86/s2idle.c
+++ b/drivers/acpi/x86/s2idle.c
@@ -463,9 +463,6 @@ static int lps0_device_attach(struct acpi_device *adev,
 			lps0_dsm_func_mask = (lps0_dsm_func_mask << 1) | 0x1;
 			acpi_handle_debug(adev->handle, "_DSM UUID %s: Adjusted function mask: 0x%x\n",
 					  ACPI_LPS0_DSM_UUID_AMD, lps0_dsm_func_mask);
-		} else if (lps0_dsm_func_mask_microsoft > 0 && rev_id) {
-			lps0_dsm_func_mask_microsoft = -EINVAL;
-			acpi_handle_debug(adev->handle, "_DSM Using AMD method\n");
 		}
 	} else {
 		rev_id = 1;