[PATCH v3 1/2] RDMA/rxe: Update wqe_index for each wqe error completion

[Li Zhijian]

Previously, if user space keeps sending abnormal wqe, queue.prod will
keep increasing while queue.index doesn't. Once
queue.index==queue.prod in next round, req_next_wqe() will treat queue
as empty. In such case, no new completion would be generated.

Update wqe_index for each wqe completion so that req_next_wqe() can get
next wqe properly.

Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
 drivers/infiniband/sw/rxe/rxe_req.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/infiniband/sw/rxe/rxe_req.c b/drivers/infiniband/sw/rxe/rxe_req.c
index a0d5e57f73c1..8bdd0b6b578f 100644
--- a/drivers/infiniband/sw/rxe/rxe_req.c
+++ b/drivers/infiniband/sw/rxe/rxe_req.c
@@ -773,6 +773,8 @@ int rxe_requester(void *arg)
 	if (ah)
 		rxe_put(ah);
 err:
+	/* update wqe_index for each wqe completion */
+	qp->req.wqe_index = queue_next_index(qp->sq.queue, qp->req.wqe_index);
 	wqe->state = wqe_state_error;
 	__rxe_do_task(&qp->comp.task);
 
-- 
2.31.1