RDMA/hns: Set NULL for __internal_mr

This patch mainly configure value for __internal_mr of mr_free_pd.
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/hns/hns_roce_hw_v1.c

@@ -722,6 +722,7 @@ static int hns_roce_v1_rsv_lp_qp(struct hns_roce_dev *hr_dev)
 	free_mr->mr_free_pd = to_hr_pd(pd);
 	free_mr->mr_free_pd->ibpd.device  = &hr_dev->ib_dev;
 	free_mr->mr_free_pd->ibpd.uobject = NULL;
+	free_mr->mr_free_pd->ibpd.__internal_mr = NULL;
 	atomic_set(&free_mr->mr_free_pd->ibpd.usecnt, 0);
 
 	attr.qp_access_flags	= IB_ACCESS_REMOTE_WRITE;