diff --git a/drivers/infiniband/hw/hns/hns_roce_cq.c b/drivers/infiniband/hw/hns/hns_roce_cq.c
index f558f95d8827..2111b57a3489 100644
--- a/drivers/infiniband/hw/hns/hns_roce_cq.c
+++ b/drivers/infiniband/hw/hns/hns_roce_cq.c
@@ -156,6 +156,7 @@ static int hns_roce_cq_alloc(struct hns_roce_dev *hr_dev, int nent,
 	}
 
 	hr_cq->cons_index = 0;
+	hr_cq->arm_sn = 1;
 	hr_cq->uar = hr_uar;
 
 	atomic_set(&hr_cq->refcount, 1);
@@ -456,6 +457,7 @@ void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn)
 		return;
 	}
 
+	++cq->arm_sn;
 	cq->comp(cq);
 }
 
diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index 724a5a0c1991..01d3d695cbba 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -347,6 +347,7 @@ struct hns_roce_cq {
 	u32				cons_index;
 	void __iomem			*cq_db_l;
 	u16				*tptr_addr;
+	int				arm_sn;
 	unsigned long			cqn;
 	u32				vector;
 	atomic_t			refcount;
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 7008fa3add80..8f719c00467b 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -1440,7 +1440,7 @@ static int hns_roce_v2_req_notify_cq(struct ib_cq *ibcq,
 		       V2_CQ_DB_PARAMETER_CONS_IDX_S,
 		       hr_cq->cons_index & ((hr_cq->cq_depth << 1) - 1));
 	roce_set_field(doorbell[1], V2_CQ_DB_PARAMETER_CMD_SN_M,
-		       V2_CQ_DB_PARAMETER_CMD_SN_S, 1);
+		       V2_CQ_DB_PARAMETER_CMD_SN_S, hr_cq->arm_sn & 0x3);
 	roce_set_bit(doorbell[1], V2_CQ_DB_PARAMETER_NOTIFY_S,
 		     notification_flag);