[dpdk-dev] [PATCH dpdk-dev 1/3] net/mlx5: avoid crash when setting hairpin queues

[xiangxia.m.yue at gmail.com]

From: Tonghao Zhang <xiangxia.m.yue at gmail.com>

If configuring the number of tx/rx queue with rte_eth_dev_configure
to nr_queues + hairpin_nr_queues, and setting tx/rx queues to
nr_queues with rte_eth_tx/rx_queue_setup. But not configuring the
hairpin queues via rte_eth_tx/rx_hairpin_queue_setup.

When starting the netdev, there is a crash because of NULL accessing.

Fixes: cf5516696d77 ("ethdev: add hairpin queue")
Cc: Ori Kam <orika at mellanox.com>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue at gmail.com>
---
 drivers/net/mlx5/mlx5_ethdev.c  | 2 +-
 drivers/net/mlx5/mlx5_trigger.c | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 1d6c084119ec..0076d05b00cc 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -476,7 +476,7 @@ mlx5_dev_configure_rss_reta(struct rte_eth_dev *dev)
 
 		rxq_data = (*priv->rxqs)[i];
 		rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
-		if (rxq_ctrl->type == MLX5_RXQ_TYPE_STANDARD)
+		if (rxq_ctrl && rxq_ctrl->type == MLX5_RXQ_TYPE_STANDARD)
 			rss_queue_arr[j++] = i;
 	}
 	rss_queue_n = j;
diff --git a/drivers/net/mlx5/mlx5_trigger.c b/drivers/net/mlx5/mlx5_trigger.c
index cafab25c67e7..ab6937ab10d1 100644
--- a/drivers/net/mlx5/mlx5_trigger.c
+++ b/drivers/net/mlx5/mlx5_trigger.c
@@ -106,9 +106,12 @@ mlx5_rxq_start(struct rte_eth_dev *dev)
 	unsigned int i;
 	int ret = 0;
 	enum mlx5_rxq_obj_type obj_type = MLX5_RXQ_OBJ_TYPE_IBV;
+	struct mlx5_rxq_data *rxq = NULL;
 
 	for (i = 0; i < priv->rxqs_n; ++i) {
-		if ((*priv->rxqs)[i]->lro) {
+		rxq = (*priv->rxqs)[i];
+
+		if (rxq && rxq->lro) {
 			obj_type =  MLX5_RXQ_OBJ_TYPE_DEVX_RQ;
 			break;
 		}
-- 
2.23.0