io_uring/iopoll: unify tw breaking logic

Let's keep checks for whether to break the iopoll loop or not same for
normal and defer tw, this includes ->cached_cq_tail checks guarding
against polling more than asked for.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d2fa8a44f8114f55a4807528da438cde93815360.1662652536.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/io_uring.c

@@ -1428,22 +1428,22 @@ static int io_iopoll_check(struct io_ring_ctx *ctx, long min)
 		 */
 		if (wq_list_empty(&ctx->iopoll_list) ||
 		    io_task_work_pending(ctx)) {
+			u32 tail = ctx->cached_cq_tail;
+
 			if (!llist_empty(&ctx->work_llist))
 				__io_run_local_work(ctx, true);
+
 			if (task_work_pending(current) ||
 			    wq_list_empty(&ctx->iopoll_list)) {
-				u32 tail = ctx->cached_cq_tail;
-
 				mutex_unlock(&ctx->uring_lock);
 				io_run_task_work();
 				mutex_lock(&ctx->uring_lock);
-
+			}
 			/* some requests don't go through iopoll_list */
 			if (tail != ctx->cached_cq_tail ||
 			    wq_list_empty(&ctx->iopoll_list))
 				break;
 		}
-		}
 		ret = io_do_iopoll(ctx, !min);
 		if (ret < 0)
 			break;