diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 979f7e4b4989db733e7ea430697cdd8002ef3b14..c0ae7e9e48d455c331a8fa444a2d225403d77964 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -1090,6 +1090,9 @@ static int __hns_roce_cmq_send(struct hns_roce_dev *hr_dev,
 		handle++;
 	}
 
+	/* Memory barrier */
+	wmb();
+
 	/* Write to hardware */
 	roce_write(hr_dev, ROCEE_TX_CMQ_TAIL_REG, csq->next_to_use);