RDMA/hns: Fix QP state judgement before receiving work requests

The QP can accept receive work requests only when the QP is
in the states that allow them to be submitted.

This patch updates the QP state judgement based on the
specification.

Signed-off-by: Yixian Liu <liuyixian@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -509,7 +509,7 @@ static int hns_roce_v2_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 	spin_lock_irqsave(&hr_qp->rq.lock, flags);
 	ind = hr_qp->rq.head & (hr_qp->rq.wqe_cnt - 1);
 
-	if (hr_qp->state == IB_QPS_RESET || hr_qp->state == IB_QPS_ERR) {
+	if (hr_qp->state == IB_QPS_RESET) {
 		spin_unlock_irqrestore(&hr_qp->rq.lock, flags);
 		*bad_wr = wr;
 		return -EINVAL;