[net-next 10/14] net/mlx5e: For TC offloads, always add new flow instead of appending the actions

[Saeed Mahameed]

From: Paul Blakey <pa...@mellanox.com>

When replacing a tc flower rule, flower first requests to add the
new rule (new action), then deletes the old one.
But currently when asked to add a new tc flower flow, we append the
actions (and counters to it).

This can result in a fte with two flow counters or conflicting
actions (drop and encap action) which firmware complains/errs
about and isn't achieving what the user aimed for.

Instead, insert the flow using the new no-append flag which will add a
new HW rule, the old flow and rule will be deleted later by flower

Signed-off-by: Paul Blakey <pa...@mellanox.com>
Reviewed-by: Or Gerlitz <ogerl...@mellanmox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c            | 2 +-
 drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c 
b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index a9c68b7859b4..8b25850cbf6a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -686,7 +686,7 @@ mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
                .action = attr->action,
                .flow_tag = attr->flow_tag,
                .reformat_id = 0,
-               .flags    = FLOW_ACT_HAS_TAG,
+               .flags    = FLOW_ACT_HAS_TAG | FLOW_ACT_NO_APPEND,
        };
        struct mlx5_fc *counter = NULL;
        bool table_created = false;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c 
b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 8501b6c31c02..289f1992f624 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -80,8 +80,8 @@ mlx5_eswitch_add_offloaded_rule(struct mlx5_eswitch *esw,
                                struct mlx5_esw_flow_attr *attr)
 {
        struct mlx5_flow_destination dest[MLX5_MAX_FLOW_FWD_VPORTS + 1] = {};
+       struct mlx5_flow_act flow_act = { .flags = FLOW_ACT_NO_APPEND, };
        bool mirror = !!(attr->mirror_count);
-       struct mlx5_flow_act flow_act = {0};
        struct mlx5_flow_handle *rule;
        struct mlx5_flow_table *fdb;
        int j, i = 0;
@@ -195,7 +195,7 @@ mlx5_eswitch_add_fwd_rule(struct mlx5_eswitch *esw,
                          struct mlx5_esw_flow_attr *attr)
 {
        struct mlx5_flow_destination dest[MLX5_MAX_FLOW_FWD_VPORTS + 1] = {};
-       struct mlx5_flow_act flow_act = {0};
+       struct mlx5_flow_act flow_act = { .flags = FLOW_ACT_NO_APPEND, };
        struct mlx5_flow_table *fast_fdb;
        struct mlx5_flow_table *fwd_fdb;
        struct mlx5_flow_handle *rule;
-- 
2.17.2