net/mlx5e: Check if inner FT is supported outside of create/destroy functions

Move the mlx5e_tunnel_inner_ft_supported() check for inner flow tables
support outside of mlx5e_create_inner_ttc_table() and
mlx5e_destroy_inner_ttc_table(). It allows to avoid accessing invalid
TIRNs of inner indirect TIRs. In a later commit these accesses will be
replaced by getters that will WARN if inner indirect TIRs don't exist.
Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/en_fs.c

@@ -1349,9 +1349,6 @@ static int mlx5e_create_inner_ttc_table(struct mlx5e_priv *priv, struct ttc_para
 	struct mlx5e_flow_table *ft = &ttc->ft;
 	int err;
 
-	if (!mlx5e_tunnel_inner_ft_supported(priv->mdev))
-		return 0;
-
 	ft->t = mlx5_create_flow_table(priv->fs.ns, &params->ft_attr);
 	if (IS_ERR(ft->t)) {
 		err = PTR_ERR(ft->t);
@@ -1377,9 +1374,6 @@ static int mlx5e_create_inner_ttc_table(struct mlx5e_priv *priv, struct ttc_para
 static void mlx5e_destroy_inner_ttc_table(struct mlx5e_priv *priv,
 					  struct mlx5e_ttc_table *ttc)
 {
-	if (!mlx5e_tunnel_inner_ft_supported(priv->mdev))
-		return;
-
 	mlx5e_cleanup_ttc_rules(ttc);
 	mlx5e_destroy_flow_table(&ttc->ft);
 }
@@ -1788,6 +1782,8 @@ int mlx5e_create_flow_steering(struct mlx5e_priv *priv)
 	}
 
 	mlx5e_set_ttc_basic_params(priv, &ttc_params);
+
+	if (mlx5e_tunnel_inner_ft_supported(priv->mdev)) {
 		mlx5e_set_inner_ttc_ft_params(&ttc_params);
 		for (tt = 0; tt < MLX5E_NUM_INDIR_TIRS; tt++)
 			ttc_params.indir_tirn[tt] = priv->inner_indir_tir[tt].tirn;
@@ -1798,6 +1794,7 @@ int mlx5e_create_flow_steering(struct mlx5e_priv *priv)
 				   err);
 			goto err_destroy_arfs_tables;
 		}
+	}
 
 	mlx5e_set_ttc_ft_params(&ttc_params);
 	for (tt = 0; tt < MLX5E_NUM_INDIR_TIRS; tt++)
@@ -1839,6 +1836,7 @@ int mlx5e_create_flow_steering(struct mlx5e_priv *priv)
 err_destroy_ttc_table:
 	mlx5e_destroy_ttc_table(priv, &priv->fs.ttc);
 err_destroy_inner_ttc_table:
+	if (mlx5e_tunnel_inner_ft_supported(priv->mdev))
 		mlx5e_destroy_inner_ttc_table(priv, &priv->fs.inner_ttc);
 err_destroy_arfs_tables:
 	mlx5e_arfs_destroy_tables(priv);
@@ -1852,6 +1850,7 @@ void mlx5e_destroy_flow_steering(struct mlx5e_priv *priv)
 	mlx5e_destroy_vlan_table(priv);
 	mlx5e_destroy_l2_table(priv);
 	mlx5e_destroy_ttc_table(priv, &priv->fs.ttc);
+	if (mlx5e_tunnel_inner_ft_supported(priv->mdev))
 		mlx5e_destroy_inner_ttc_table(priv, &priv->fs.inner_ttc);
 	mlx5e_arfs_destroy_tables(priv);
 	mlx5e_ethtool_cleanup_steering(priv);