From: Maxim Mikityanskiy <maximmi@nvidia.com>
Date: Tue, 13 Apr 2021 17:06:45 +0300
Subject: net/mlx5e: Check if inner FT is supported outside of create/destroy
 functions
Patch-mainline: v5.15-rc1
Git-commit: bc5506a166c3d118f7b0a96e5e3dbbbb48ac29ed
References: jsc#SLE-19253

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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_fs.c |   31 +++++++++++-------------
 1 file changed, 15 insertions(+), 16 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
@@ -1349,9 +1349,6 @@ static int mlx5e_create_inner_ttc_table(
 	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 @@ err:
 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);
 }
@@ -1788,15 +1782,18 @@ int mlx5e_create_flow_steering(struct ml
 	}
 
 	mlx5e_set_ttc_basic_params(priv, &ttc_params);
-	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;
 
-	err = mlx5e_create_inner_ttc_table(priv, &ttc_params, &priv->fs.inner_ttc);
-	if (err) {
-		netdev_err(priv->netdev, "Failed to create inner ttc table, err=%d\n",
-			   err);
-		goto err_destroy_arfs_tables;
+	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;
+
+		err = mlx5e_create_inner_ttc_table(priv, &ttc_params, &priv->fs.inner_ttc);
+		if (err) {
+			netdev_err(priv->netdev, "Failed to create inner ttc table, err=%d\n",
+				   err);
+			goto err_destroy_arfs_tables;
+		}
 	}
 
 	mlx5e_set_ttc_ft_params(&ttc_params);
@@ -1839,7 +1836,8 @@ err_destroy_l2_table:
 err_destroy_ttc_table:
 	mlx5e_destroy_ttc_table(priv, &priv->fs.ttc);
 err_destroy_inner_ttc_table:
-	mlx5e_destroy_inner_ttc_table(priv, &priv->fs.inner_ttc);
+	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);
 
@@ -1852,7 +1850,8 @@ void mlx5e_destroy_flow_steering(struct
 	mlx5e_destroy_vlan_table(priv);
 	mlx5e_destroy_l2_table(priv);
 	mlx5e_destroy_ttc_table(priv, &priv->fs.ttc);
-	mlx5e_destroy_inner_ttc_table(priv, &priv->fs.inner_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);
 }