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net/mlx5e: Properly handle FW errors while adding TC rules

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When the firmware returns an error (common example is an attempt to
add twice the same rule which is refused by the some FWs), we are not
properly derefing/cleaning few resources allocated on the way.
Examples are vport vlan deref under eswitch vlan offloads, and encap
entry/neighbour deref under eswitch encapsulation offloads, fix that.

Fixes: a54e20b4fc ('net/mlx5e: Add basic TC tunnel set action for SRIOV offloads')
Fixes: 8b32580df1 ('net/mlx5e: Add TC vlan action for SRIOV offloads')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2017-01-10 22:33:36 +02:00 committed by David S. Miller
parent a757d108dc
commit 5e86397abe
1 changed files with 11 additions and 7 deletions
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18
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
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@ -161,15 +161,21 @@ static void mlx5e_detach_encap(struct mlx5e_priv *priv,
}
}
/* we get here also when setting rule to the FW failed, etc. It means that the
* flow rule itself might not exist, but some offloading related to the actions
* should be cleaned.
*/
static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
struct mlx5_fc *counter = NULL;
counter = mlx5_flow_rule_counter(flow->rule);
mlx5_del_flow_rules(flow->rule);
if (!IS_ERR(flow->rule)) {
counter = mlx5_flow_rule_counter(flow->rule);
mlx5_del_flow_rules(flow->rule);
mlx5_fc_destroy(priv->mdev, counter);
}
if (esw && esw->mode == SRIOV_OFFLOADS) {
mlx5_eswitch_del_vlan_action(esw, flow->attr);
@ -177,8 +183,6 @@ static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
mlx5e_detach_encap(priv, flow);
}
mlx5_fc_destroy(priv->mdev, counter);
if (!mlx5e_tc_num_filters(priv) && (priv->fs.tc.t)) {
mlx5_destroy_flow_table(priv->fs.tc.t);
priv->fs.tc.t = NULL;
@ -1017,7 +1021,7 @@ int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
if (IS_ERR(flow->rule)) {
err = PTR_ERR(flow->rule);
goto err_free;
goto err_del_rule;
}
err = rhashtable_insert_fast(&tc->ht, &flow->node,
@ -1028,7 +1032,7 @@ int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
goto out;
err_del_rule:
mlx5_del_flow_rules(flow->rule);
mlx5e_tc_del_flow(priv, flow);
err_free:
kfree(flow);