io_uring: clean io_poll_complete

to #28170604

commit b0a20349f212dc725f5ddfd060e426fe6181d9c5 upstream

Deduplicate call to io_cqring_fill_event(), plain and easy
Signed-off-by: NPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>
Signed-off-by: NXiaoguang Wang <xiaoguang.wang@linux.alibaba.com>

fs/io_uring.c

@@ -3650,10 +3650,7 @@ static void io_poll_complete(struct io_kiocb *req, __poll_t mask, int error)
 	struct io_ring_ctx *ctx = req->ctx;
 
 	req->poll.done = true;
-	if (error)
-		io_cqring_fill_event(req, error);
-	else
-		io_cqring_fill_event(req, mangle_poll(mask));
+	io_cqring_fill_event(req, error ? error : mangle_poll(mask));
 	io_commit_cqring(ctx);
 }