diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index a6585854a85f..2eeeb6fd631d 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -396,6 +396,14 @@ static void __unmap_grant_pages_done(int result,
 			map->unmap_ops[offset+i].handle,
 			map->unmap_ops[offset+i].status);
 		map->unmap_ops[offset+i].handle = -1;
+		if (use_ptemod) {
+			WARN_ON(map->kunmap_ops[offset+i].status &&
+				map->kunmap_ops[offset+i].handle != -1);
+			pr_debug("kunmap handle=%u st=%d\n",
+				 map->kunmap_ops[offset+i].handle,
+				 map->kunmap_ops[offset+i].status);
+			map->kunmap_ops[offset+i].handle = -1;
+		}
 	}
 	/*
 	 * Decrease the live-grant counter.  This must happen after the loop to