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mt76: avoid extra RCU synchronization on station removal

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Use sta_pre_rcu_remove callback to clear wcid pointer earlier

Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Felix Fietkau
2020-02-07 12:33:17 +01:00
parent 721673759d
commit bd0df1b017
9 changed files with 23 additions and 3 deletions
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mac80211.c
+13 -3
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@@ -983,9 +983,6 @@ void __mt76_sta_remove(struct mt76_dev *dev, struct ieee80211_vif *vif,
struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
int i, idx = wcid->idx;
rcu_assign_pointer(dev->wcid[idx], NULL);
synchronize_rcu();
for (i = 0; i < ARRAY_SIZE(wcid->aggr); i++)
mt76_rx_aggr_stop(dev, wcid, i);
@@ -1035,6 +1032,19 @@ int mt76_sta_state(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
}
EXPORT_SYMBOL_GPL(mt76_sta_state);
void mt76_sta_pre_rcu_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct mt76_phy *phy = hw->priv;
struct mt76_dev *dev = phy->dev;
struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
mutex_lock(&dev->mutex);
rcu_assign_pointer(dev->wcid[wcid->idx], NULL);
mutex_unlock(&dev->mutex);
}
EXPORT_SYMBOL_GPL(mt76_sta_pre_rcu_remove);
int mt76_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
int *dbm)
{