diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 520fe3d0a882352a206cb6f3136b147f53cdf2f4..f8540cc67b44cca5ea37548f781f61f609124fda 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -1254,7 +1254,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
 
 	}
 
-	return 0;
+	return -ENOTTY;
 }
 
 static ssize_t