[dpdk-dev] [PATCH] net/mlx5: fix Tx queue doorbell record field offset

[Viacheslav Ovsiienko]

If the Send Queue (backing one for PMD Tx queue) the was
created with DevX API the doorbell record offset for the
producer index field was incorrect. If hardware missed the
doorbell register write event the wrong content of doorbell
record might cause queue malfunction. For the Send Queues
created with Verbs API the doorbell record offset was
configured correctly.

Fixes: 86d259cec852 ("net/mlx5: separate Tx queue object creations")
Cc: stable at dpdk.org

Signed-off-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>
---
 drivers/net/mlx5/mlx5_devx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_devx.c b/drivers/net/mlx5/mlx5_devx.c
index 76d31f5539..531a81d7fa 100644
--- a/drivers/net/mlx5/mlx5_devx.c
+++ b/drivers/net/mlx5/mlx5_devx.c
@@ -1113,7 +1113,7 @@ mlx5_txq_devx_obj_new(struct rte_eth_dev *dev, uint16_t idx)
 	txq_data->wqe_pi = 0;
 	txq_data->wqe_comp = 0;
 	txq_data->wqe_thres = txq_data->wqe_s / MLX5_TX_COMP_THRESH_INLINE_DIV;
-	txq_data->qp_db = txq_obj->sq_obj.db_rec;
+	txq_data->qp_db = &txq_obj->sq_obj.db_rec[MLX5_SND_DBR];
 	*txq_data->qp_db = 0;
 	txq_data->qp_num_8s = txq_obj->sq_obj.sq->id << 8;
 	/* Change Send Queue state to Ready-to-Send. */
-- 
2.18.1