diff --git a/mm/madvise.c b/mm/madvise.c
index 2566945d91ec..0ef30360c870 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -1273,8 +1273,7 @@ SYSCALL_DEFINE5(process_madvise, int, pidfd, const struct iovec __user *, vec,
 		iov_iter_advance(&iter, iovec.iov_len);
 	}
 
-	if (ret == 0)
-		ret = total_len - iov_iter_count(&iter);
+	ret = (total_len - iov_iter_count(&iter)) ? : ret;
 
 release_mm:
 	mmput(mm);