netdev - [net 03/16] net/mlx5e: TC, Keep mod hdr actions after mod hdr alloc

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Date:   Mon,  9 Jan 2023 22:11:10 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>
Cc:     Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...dia.com>,
        Ariel Levkovich <lariel@...dia.com>
Subject: [net 03/16] net/mlx5e: TC, Keep mod hdr actions after mod hdr alloc

From: Ariel Levkovich <lariel@...dia.com>

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@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 9af2aa2922f5..dbadaf166487 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -1301,7 +1301,6 @@ 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;
 	}
@@ -1359,8 +1358,10 @@ 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);
-- 
2.39.0