diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 9e92ec8006fc..d76ea27e2bbb 100644
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -179,6 +179,8 @@ int __mmu_notifier_invalidate_range_start(struct mmu_notifier_range *range)
 				pr_info("%pS callback failed with %d in %sblockable context.\n",
 					mn->ops->invalidate_range_start, _ret,
 					!mmu_notifier_range_blockable(range) ? "non-" : "");
+				WARN_ON(mmu_notifier_range_blockable(range) ||
+					ret != -EAGAIN);
 				ret = _ret;
 			}
 		}