io_uring: fix missing io_queue_linked_timeout()

Whoever called io_prep_linked_timeout() should also do
io_queue_linked_timeout(). __io_queue_sqe() doesn't follow that for the
punting path leaving linked timeouts prepared but never queued.

Fixes: 6df1db6b ("io_uring: fix mis-refcounting linked timeouts")
Signed-off-by: NPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

fs/io_uring.c

@@ -5987,20 +5987,20 @@ static void __io_queue_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe,
 	 * doesn't support non-blocking read/write attempts
 	 */
 	if (ret == -EAGAIN && !(req->flags & REQ_F_NOWAIT)) {
-		if (io_arm_poll_handler(req)) {
-			if (linked_timeout)
-				io_queue_linked_timeout(linked_timeout);
-			goto exit;
-		}
+		if (!io_arm_poll_handler(req)) {
 punt:
-		ret = io_prep_work_files(req);
-		if (unlikely(ret))
-			goto err;
-		/*
-		 * Queued up for async execution, worker will release
-		 * submit reference when the iocb is actually submitted.
-		 */
-		io_queue_async_work(req);
+			ret = io_prep_work_files(req);
+			if (unlikely(ret))
+				goto err;
+			/*
+			 * Queued up for async execution, worker will release
+			 * submit reference when the iocb is actually submitted.
+			 */
+			io_queue_async_work(req);
+		}
+
+		if (linked_timeout)
+			io_queue_linked_timeout(linked_timeout);
 		goto exit;
 	}