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net/mlx5e: CT: Return err_ptr from internal functions

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Instead of having to deal with converting between int and ERR_PTR for
return values in mlx5_tc_ct_flow_offload(), make the internal helper
functions return a ptr to mlx5_flow_handle instead of passing it as
output param, this will also avoid gcc confusion and false alarms,
thus we remove the redundant ERR_PTR rule initialization.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Suggested-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
This commit is contained in:
Saeed Mahameed
2020-05-04 15:52:14 -07:00
parent d12f4521d3
commit 2acc4551d4
1 changed files with 14 additions and 23 deletions
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37
drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
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@@ -1400,12 +1400,11 @@ mlx5_tc_ct_del_ft_cb(struct mlx5_tc_ct_priv *ct_priv, struct mlx5_ct_ft *ft)
* + fte_id match +------------------------>
* +--------------+
*/
static int
static struct mlx5_flow_handle *
__mlx5_tc_ct_flow_offload(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct mlx5_flow_spec *orig_spec,
struct mlx5_esw_flow_attr *attr,
struct mlx5_flow_handle **flow_rule)
struct mlx5_esw_flow_attr *attr)
{
struct mlx5_tc_ct_priv *ct_priv = mlx5_tc_ct_get_ct_priv(priv);
bool nat = attr->ct_attr.ct_action & TCA_CT_ACT_NAT;
@@ -1425,7 +1424,7 @@ __mlx5_tc_ct_flow_offload(struct mlx5e_priv *priv,
if (!post_ct_spec || !ct_flow) {
kfree(post_ct_spec);
kfree(ct_flow);
return -ENOMEM;
return ERR_PTR(-ENOMEM);
}
/* Register for CT established events */
@@ -1546,11 +1545,10 @@ __mlx5_tc_ct_flow_offload(struct mlx5e_priv *priv,
}
attr->ct_attr.ct_flow = ct_flow;
*flow_rule = ct_flow->post_ct_rule;
dealloc_mod_hdr_actions(&pre_mod_acts);
kfree(post_ct_spec);
return 0;
return rule;
err_insert_orig:
mlx5_eswitch_del_offloaded_rule(ct_priv->esw, ct_flow->post_ct_rule,
@@ -1568,16 +1566,15 @@ err_ft:
kfree(post_ct_spec);
kfree(ct_flow);
netdev_warn(priv->netdev, "Failed to offload ct flow, err %d\n", err);
return err;
return ERR_PTR(err);
}
static int
static struct mlx5_flow_handle *
__mlx5_tc_ct_flow_offload_clear(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct mlx5_flow_spec *orig_spec,
struct mlx5_esw_flow_attr *attr,
struct mlx5e_tc_mod_hdr_acts *mod_acts,
struct mlx5_flow_handle **flow_rule)
struct mlx5e_tc_mod_hdr_acts *mod_acts)
{
struct mlx5_tc_ct_priv *ct_priv = mlx5_tc_ct_get_ct_priv(priv);
struct mlx5_eswitch *esw = ct_priv->esw;
@@ -1589,7 +1586,7 @@ __mlx5_tc_ct_flow_offload_clear(struct mlx5e_priv *priv,
ct_flow = kzalloc(sizeof(*ct_flow), GFP_KERNEL);
if (!ct_flow)
return -ENOMEM;
return ERR_PTR(-ENOMEM);
/* Base esw attributes on original rule attribute */
pre_ct_attr = &ct_flow->pre_ct_attr;
@@ -1624,16 +1621,14 @@ __mlx5_tc_ct_flow_offload_clear(struct mlx5e_priv *priv,
attr->ct_attr.ct_flow = ct_flow;
ct_flow->pre_ct_rule = rule;
*flow_rule = rule;
return 0;
return rule;
err_insert:
mlx5_modify_header_dealloc(priv->mdev, mod_hdr);
err_set_registers:
netdev_warn(priv->netdev,
"Failed to offload ct clear flow, err %d\n", err);
return err;
return ERR_PTR(err);
}
struct mlx5_flow_handle *
@@ -1645,22 +1640,18 @@ mlx5_tc_ct_flow_offload(struct mlx5e_priv *priv,
{
bool clear_action = attr->ct_attr.ct_action & TCA_CT_ACT_CLEAR;
struct mlx5_tc_ct_priv *ct_priv = mlx5_tc_ct_get_ct_priv(priv);
struct mlx5_flow_handle *rule = ERR_PTR(-EINVAL);
int err;
struct mlx5_flow_handle *rule;
if (!ct_priv)
return ERR_PTR(-EOPNOTSUPP);
mutex_lock(&ct_priv->control_lock);
if (clear_action)
err = __mlx5_tc_ct_flow_offload_clear(priv, flow, spec, attr,
mod_hdr_acts, &rule);
rule = __mlx5_tc_ct_flow_offload_clear(priv, flow, spec, attr, mod_hdr_acts);
else
err = __mlx5_tc_ct_flow_offload(priv, flow, spec, attr,
&rule);
rule = __mlx5_tc_ct_flow_offload(priv, flow, spec, attr);
mutex_unlock(&ct_priv->control_lock);
if (err)
return ERR_PTR(err);
return rule;
}