From: Lijun Ou <oulijun@huawei.com>
Date: Sat, 8 Dec 2018 18:40:08 +0800
Subject: RDMA/hns: Encapsulate and simplify qp state transition
Patch-mainline: v5.0-rc1
Git-commit: 233673e422de70d6ba32e7b41dd75e47f036d03b
References: bsc#1104427 FATE#326416

This patch move the codes of qp state transition into the new function as
well as simplify the logic for other qp states transition.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c |   31 ++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -3662,6 +3662,21 @@ static int modify_qp_rtr_to_rts(struct i
 	return 0;
 }
 
+static inline bool hns_roce_v2_check_qp_stat(enum ib_qp_state cur_state,
+					     enum ib_qp_state new_state)
+{
+
+	if ((cur_state != IB_QPS_RESET &&
+	    (new_state == IB_QPS_ERR || new_state == IB_QPS_RESET)) ||
+	    ((cur_state == IB_QPS_RTS || cur_state == IB_QPS_SQD) &&
+	    (new_state == IB_QPS_RTS || new_state == IB_QPS_SQD)) ||
+	    (cur_state == IB_QPS_SQE && new_state == IB_QPS_RTS))
+		return true;
+
+	return false;
+
+}
+
 static int hns_roce_v2_modify_qp(struct ib_qp *ibqp,
 				 const struct ib_qp_attr *attr,
 				 int attr_mask, enum ib_qp_state cur_state,
@@ -3703,21 +3718,7 @@ static int hns_roce_v2_modify_qp(struct
 					   qpc_mask);
 		if (ret)
 			goto out;
-	} else if ((cur_state == IB_QPS_RTS && new_state == IB_QPS_RTS) ||
-		   (cur_state == IB_QPS_SQE && new_state == IB_QPS_RTS) ||
-		   (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD) ||
-		   (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD) ||
-		   (cur_state == IB_QPS_SQD && new_state == IB_QPS_RTS) ||
-		   (cur_state == IB_QPS_INIT && new_state == IB_QPS_RESET) ||
-		   (cur_state == IB_QPS_RTR && new_state == IB_QPS_RESET) ||
-		   (cur_state == IB_QPS_RTS && new_state == IB_QPS_RESET) ||
-		   (cur_state == IB_QPS_ERR && new_state == IB_QPS_RESET) ||
-		   (cur_state == IB_QPS_INIT && new_state == IB_QPS_ERR) ||
-		   (cur_state == IB_QPS_RTR && new_state == IB_QPS_ERR) ||
-		   (cur_state == IB_QPS_RTS && new_state == IB_QPS_ERR) ||
-		   (cur_state == IB_QPS_SQD && new_state == IB_QPS_ERR) ||
-		   (cur_state == IB_QPS_SQE && new_state == IB_QPS_ERR) ||
-		   (cur_state == IB_QPS_ERR && new_state == IB_QPS_ERR)) {
+	} else if (hns_roce_v2_check_qp_stat(cur_state, new_state)) {
 		/* Nothing */
 		;
 	} else {