RDMA/hns: Fix cast from or to restricted __le32 for driver

Sparse is whining about the u32 and __le32 mixed usage in the driver.
The roce_set_field() is used to __le32 data of hardware only.
If a variable is not delivered to the hardware, the __le32 type and
related operations are not required.

Signed-off-by: Lang Cheng <chenglang@huawei.com>
Link: https://lore.kernel.org/r/1566393276-42555-6-git-send-email-oulijun@huawei.com
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 16 insertions, 21 deletions

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
index 3fcd0bdc79dd..07b72061faa5 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
@@ -73,7 +73,7 @@ static int hns_roce_v1_post_send(struct ib_qp *ibqp,
 	int ps_opcode = 0, i = 0;
 	unsigned long flags = 0;
 	void *wqe = NULL;
-	u32 doorbell[2];
+	__le32 doorbell[2];
 	int nreq = 0;
 	u32 ind = 0;
 	int ret = 0;
@@ -332,10 +332,10 @@ out:
 			       SQ_DOORBELL_U32_8_QPN_S, qp->doorbell_qpn);
 		roce_set_bit(sq_db.u32_8, SQ_DOORBELL_HW_SYNC_S, 1);
 
-		doorbell[0] = le32_to_cpu(sq_db.u32_4);
-		doorbell[1] = le32_to_cpu(sq_db.u32_8);
+		doorbell[0] = sq_db.u32_4;
+		doorbell[1] = sq_db.u32_8;
 
-		hns_roce_write64_k((__le32 *)doorbell, qp->sq.db_reg_l);
+		hns_roce_write64_k(doorbell, qp->sq.db_reg_l);
 		qp->sq_next_wqe = ind;
 	}
 
@@ -360,7 +360,7 @@ static int hns_roce_v1_post_recv(struct ib_qp *ibqp,
 	struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device);
 	struct device *dev = &hr_dev->pdev->dev;
 	struct hns_roce_rq_db rq_db;
-	uint32_t doorbell[2] = {0};
+	__le32 doorbell[2] = {0};
 
 	spin_lock_irqsave(&hr_qp->rq.lock, flags);
 	ind = hr_qp->rq.head & (hr_qp->rq.wqe_cnt - 1);
@@ -434,11 +434,10 @@ out:
 			roce_set_bit(rq_db.u32_8, RQ_DOORBELL_U32_8_HW_SYNC_S,
 				     1);
 
-			doorbell[0] = le32_to_cpu(rq_db.u32_4);
-			doorbell[1] = le32_to_cpu(rq_db.u32_8);
+			doorbell[0] = rq_db.u32_4;
+			doorbell[1] = rq_db.u32_8;
 
-			hns_roce_write64_k((__le32 *)doorbell,
-					   hr_qp->rq.db_reg_l);
+			hns_roce_write64_k(doorbell, hr_qp->rq.db_reg_l);
 		}
 	}
 	spin_unlock_irqrestore(&hr_qp->rq.lock, flags);
@@ -712,7 +711,7 @@ static int hns_roce_v1_rsv_lp_qp(struct hns_roce_dev *hr_dev)
 	struct ib_cq *cq;
 	struct ib_pd *pd;
 	union ib_gid dgid;
-	u64 subnet_prefix;
+	__be64 subnet_prefix;
 	int attr_mask = 0;
 	int ret;
 	int i, j;
@@ -2162,7 +2161,7 @@ static int hns_roce_v1_req_notify_cq(struct ib_cq *ibcq,
 {
 	struct hns_roce_cq *hr_cq = to_hr_cq(ibcq);
 	u32 notification_flag;
-	__le32 doorbell[2];
+	__le32 doorbell[2] = {};
 
 	notification_flag = (flags & IB_CQ_SOLICITED_MASK) ==
 			    IB_CQ_SOLICITED ? CQ_DB_REQ_NOT : CQ_DB_REQ_NOT_SOL;
@@ -2437,18 +2436,12 @@ static int hns_roce_v1_clear_hem(struct hns_roce_dev *hr_dev,
 
 	switch (table->type) {
 	case HEM_TYPE_QPC:
-		roce_set_field(bt_cmd_val[1], ROCEE_BT_CMD_H_ROCEE_BT_CMD_MDF_M,
-			ROCEE_BT_CMD_H_ROCEE_BT_CMD_MDF_S, HEM_TYPE_QPC);
 		bt_ba = priv->bt_table.qpc_buf.map >> 12;
 		break;
 	case HEM_TYPE_MTPT:
-		roce_set_field(bt_cmd_val[1], ROCEE_BT_CMD_H_ROCEE_BT_CMD_MDF_M,
-			ROCEE_BT_CMD_H_ROCEE_BT_CMD_MDF_S, HEM_TYPE_MTPT);
 		bt_ba = priv->bt_table.mtpt_buf.map >> 12;
 		break;
 	case HEM_TYPE_CQC:
-		roce_set_field(bt_cmd_val[1], ROCEE_BT_CMD_H_ROCEE_BT_CMD_MDF_M,
-			ROCEE_BT_CMD_H_ROCEE_BT_CMD_MDF_S, HEM_TYPE_CQC);
 		bt_ba = priv->bt_table.cqc_buf.map >> 12;
 		break;
 	case HEM_TYPE_SRQC:
@@ -2457,6 +2450,8 @@ static int hns_roce_v1_clear_hem(struct hns_roce_dev *hr_dev,
 	default:
 		return 0;
 	}
+	roce_set_field(bt_cmd_val[1], ROCEE_BT_CMD_H_ROCEE_BT_CMD_MDF_M,
+			ROCEE_BT_CMD_H_ROCEE_BT_CMD_MDF_S, table->type);
 	roce_set_field(bt_cmd_val[1], ROCEE_BT_CMD_H_ROCEE_BT_CMD_IN_MDF_M,
 		ROCEE_BT_CMD_H_ROCEE_BT_CMD_IN_MDF_S, obj);
 	roce_set_bit(bt_cmd_val[1], ROCEE_BT_CMD_H_ROCEE_BT_CMD_S, 0);
@@ -2481,7 +2476,7 @@ static int hns_roce_v1_clear_hem(struct hns_roce_dev *hr_dev,
 		end -= HW_SYNC_SLEEP_TIME_INTERVAL;
 	}
 
-	bt_cmd_val[0] = (__le32)bt_ba;
+	bt_cmd_val[0] = cpu_to_le32(bt_ba);
 	roce_set_field(bt_cmd_val[1], ROCEE_BT_CMD_H_ROCEE_BT_CMD_BA_H_M,
 		ROCEE_BT_CMD_H_ROCEE_BT_CMD_BA_H_S, bt_ba >> 32);
 	hns_roce_write64_k(bt_cmd_val, hr_dev->reg_base + ROCEE_BT_CMD_L_REG);
@@ -2624,7 +2619,7 @@ static int hns_roce_v1_m_sqp(struct ib_qp *ibqp, const struct ib_qp_attr *attr,
 			       QP1C_BYTES_16_PORT_NUM_S, hr_qp->phy_port);
 		roce_set_bit(context->qp1c_bytes_16,
 			     QP1C_BYTES_16_SIGNALING_TYPE_S,
-			     le32_to_cpu(hr_qp->sq_signal_bits));
+			     hr_qp->sq_signal_bits);
 		roce_set_bit(context->qp1c_bytes_16, QP1C_BYTES_16_RQ_BA_FLG_S,
 			     1);
 		roce_set_bit(context->qp1c_bytes_16, QP1C_BYTES_16_SQ_BA_FLG_S,
@@ -2930,7 +2925,7 @@ static int hns_roce_v1_m_qp(struct ib_qp *ibqp, const struct ib_qp_attr *attr,
 			     1);
 		roce_set_bit(context->qpc_bytes_32,
 			     QP_CONTEXT_QPC_BYTE_32_SIGNALING_TYPE_S,
-			     le32_to_cpu(hr_qp->sq_signal_bits));
+			     hr_qp->sq_signal_bits);
 
 		port = (attr_mask & IB_QP_PORT) ? (attr->port_num - 1) :
 			hr_qp->port;
@@ -3575,7 +3570,7 @@ static int hns_roce_v1_q_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
 	qp_attr->retry_cnt = roce_get_field(context->qpc_bytes_148,
 			     QP_CONTEXT_QPC_BYTES_148_RETRY_COUNT_M,
 			     QP_CONTEXT_QPC_BYTES_148_RETRY_COUNT_S);
-	qp_attr->rnr_retry = (u8)context->rnr_retry;
+	qp_attr->rnr_retry = (u8)le32_to_cpu(context->rnr_retry);
 
 done:
 	qp_attr->cur_qp_state = qp_attr->qp_state;