RDMA/rtrs-srv: Do not signal REG_MR

commit e8ae7dd upstream.

We do not need to wait for REG_MR completion, so remove the
SIGNAL flag.

Fixes: 9cb8374 ("RDMA/rtrs: server: main functionality")
Link: https://lore.kernel.org/r/20201217141915.56989-18-jinpu.wang@cloud.ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/infiniband/ulp/rtrs/rtrs-srv.c

@@ -820,7 +820,7 @@ static int process_info_req(struct rtrs_srv_con *con,
 		rwr[mri].wr.opcode = IB_WR_REG_MR;
 		rwr[mri].wr.wr_cqe = &local_reg_cqe;
 		rwr[mri].wr.num_sge = 0;
-		rwr[mri].wr.send_flags = mri ? 0 : IB_SEND_SIGNALED;
+		rwr[mri].wr.send_flags = 0;
 		rwr[mri].mr = mr;
 		rwr[mri].key = mr->rkey;
 		rwr[mri].access = (IB_ACCESS_LOCAL_WRITE |