net/mlx5: fix tunnel offload detection

PMD driver got random tunnel_en value on ConnextX-4LX NIC, depends on
compile optimization level. The variable was not initialized and
detection logic was absent.

Fixes: f5fde5205101 ("net/mlx5: add hardware checksum offload for tunnel packets")
Cc: stable@dpdk.org
Signed-off-by: Xueming Li <xuemingl@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index d7968f5..084df88 100644 (file)
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -445,7 +445,7 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
        struct ibv_device_attr device_attr;
        unsigned int sriov;
        unsigned int mps;
-       unsigned int tunnel_en;
+       unsigned int tunnel_en = 0;
        int idx;
        int i;
 
@@ -503,6 +503,7 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
                        mps = MLX5_MPW_DISABLED;
                        break;
                case PCI_DEVICE_ID_MELLANOX_CONNECTX4LX:
+                       tunnel_en = 1;
                        mps = MLX5_MPW;
                        break;
                case PCI_DEVICE_ID_MELLANOX_CONNECTX5: