RDMA/hns: Make the end of sge process more clear

Instead of i with the sge number of wr will make the comparision more
clear, that is, when the sge number in wr is small than the maximum
supported sge number in the queue, then a stop sge needed to be filled at
the end of sges in wr.

Link: https://lore.kernel.org/r/1590152579-32364-5-git-send-email-liweihang@huawei.comSigned-off-by: NYixian Liu <liuyixian@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -646,7 +646,7 @@ static int hns_roce_v2_post_recv(struct ib_qp *ibqp,
 			dseg++;
 		}
 
-		if (i < hr_qp->rq.max_gs) {
+		if (wr->num_sge < hr_qp->rq.max_gs) {
 			dseg->lkey = cpu_to_le32(HNS_ROCE_INVALID_LKEY);
 			dseg->addr = 0;
 			dseg->len = cpu_to_le32(HNS_ROCE_INVALID_SGE_LENGTH);
@@ -782,7 +782,7 @@ static int hns_roce_v2_post_srq_recv(struct ib_srq *ibsrq,
 			dseg[i].addr = cpu_to_le64(wr->sg_list[i].addr);
 		}
 
-		if (i < srq->max_gs) {
+		if (wr->num_sge < srq->max_gs) {
 			dseg[i].len = cpu_to_le32(HNS_ROCE_INVALID_SGE_LENGTH);
 			dseg[i].lkey = cpu_to_le32(HNS_ROCE_INVALID_LKEY);
 			dseg[i].addr = 0;