net/mlx5e: TC, Keep mod hdr actions after mod hdr alloc

[ Upstream commit 5e72f3f1c558019082cfeedeed73748f35d780c6 ]

When offloading TC NIC rule which has mod_hdr action, the
mod_hdr actions list is freed upon mod_hdr allocation.

In the new format of handling multi table actions and CT in
particular, the mod_hdr actions list is still relevant when
setting the pre and post rules and therefore, freeing the list
may cause adding rules which don't set the FTE_ID.

Therefore, the mod_hdr actions list needs to be kept for the
pre/post flows as well and should be left for these handler to
be freed.

Fixes: 8300f225268b ("net/mlx5e: Create new flow attr for multi table actions")
Signed-off-by: Ariel Levkovich <lariel@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index bd9936a..4c313b7 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -1283,7 +1283,6 @@ mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
 
        if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
                err = mlx5e_attach_mod_hdr(priv, flow, parse_attr);
-               mlx5e_mod_hdr_dealloc(&parse_attr->mod_hdr_acts);
                if (err)
                        return err;
        }
@@ -1341,8 +1340,10 @@ static void mlx5e_tc_del_nic_flow(struct mlx5e_priv *priv,
        }
        mutex_unlock(&tc->t_lock);
 
-       if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR)
+       if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
+               mlx5e_mod_hdr_dealloc(&attr->parse_attr->mod_hdr_acts);
                mlx5e_detach_mod_hdr(priv, flow);
+       }
 
        if (attr->action & MLX5_FLOW_CONTEXT_ACTION_COUNT)
                mlx5_fc_destroy(priv->mdev, attr->counter);