[PATCH RFC] io_uring: remove retries from io_wq_submit_work()

[Pavel Begunkov <asml.silence@gmail.com>]

It seems no opcode may return -EAGAIN for non-blocking case and expect
to be reissued. Remove retry code from io_wq_submit_work().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 fs/io_uring.c | 18 +++---------------
 1 file changed, 3 insertions(+), 15 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index b9dd94143c30..b2ce8a3d3dd1 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -4622,26 +4622,14 @@ static void io_wq_submit_work(struct io_wq_work **workptr)
 	struct io_wq_work *work = *workptr;
 	struct io_kiocb *req = container_of(work, struct io_kiocb, work);
 	struct io_kiocb *nxt = NULL;
-	int ret = 0;
+	int ret;
 
 	/* if NO_CANCEL is set, we must still run the work */
 	if ((work->flags & (IO_WQ_WORK_CANCEL|IO_WQ_WORK_NO_CANCEL)) ==
 				IO_WQ_WORK_CANCEL) {
 		ret = -ECANCELED;
-	}
-
-	if (!ret) {
-		do {
-			ret = io_issue_sqe(req, NULL, &nxt, false);
-			/*
-			 * We can get EAGAIN for polled IO even though we're
-			 * forcing a sync submission from here, since we can't
-			 * wait for request slots on the block side.
-			 */
-			if (ret != -EAGAIN)
-				break;
-			cond_resched();
-		} while (1);
+	} else {
+		ret = io_issue_sqe(req, NULL, &nxt, false);
 	}
 
 	/* drop submission reference */
-- 
2.24.0