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net: dsa: sja1105: unconditionally free old gating config

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Currently sja1105_compose_gating_subschedule is not prepared to be
called for the case where we want to recompute the global tc-gate
configuration after we've deleted those actions on a port.

After deleting the tc-gate actions on the last port, max_cycle_time
would become zero, and that would incorrectly prevent
sja1105_free_gating_config from getting called.

So move the freeing function above the check for the need to apply a new
configuration.

Fixes: 834f8933d5 ("net: dsa: sja1105: implement tc-gate using time-triggered virtual links")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2020-06-24 16:54:45 +03:00 committed by David S. Miller
parent e39109f596
commit 026bdb2b96
1 changed files with 2 additions and 2 deletions
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4
drivers/net/dsa/sja1105/sja1105_vl.c
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@ -98,6 +98,8 @@ static int sja1105_compose_gating_subschedule(struct sja1105_private *priv,
s64 its_base_time = 0;
int i, rc = 0;
sja1105_free_gating_config(gating_cfg);
list_for_each_entry(rule, &priv->flow_block.rules, list) {
if (rule->type != SJA1105_RULE_VL)
continue;
@ -116,8 +118,6 @@ static int sja1105_compose_gating_subschedule(struct sja1105_private *priv,
dev_dbg(priv->ds->dev, "max_cycle_time %lld its_base_time %lld\n",
max_cycle_time, its_base_time);
sja1105_free_gating_config(gating_cfg);
gating_cfg->base_time = its_base_time;
gating_cfg->cycle_time = max_cycle_time;
gating_cfg->num_entries = 0;