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iwlwifi: add missing rcu_read_lock
Using ieee80211_find_sta() needs to be under RCU read lock, which iwlwifi currently misses, so fix it. Cc: stable@kernel.org Reported-by: Miles Lane <miles.lane@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-by: Reinette Chatre <reinette.chatre@intel.com> Tested-by: Miles Lane <miles.lane@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -1125,6 +1125,7 @@ static void iwlagn_tx_status(struct iwl_priv *priv, struct sk_buff *skb)
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struct ieee80211_sta *sta;
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struct iwl_station_priv *sta_priv;
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rcu_read_lock();
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sta = ieee80211_find_sta(priv->vif, hdr->addr1);
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if (sta) {
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sta_priv = (void *)sta->drv_priv;
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@ -1133,6 +1134,7 @@ static void iwlagn_tx_status(struct iwl_priv *priv, struct sk_buff *skb)
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atomic_dec_return(&sta_priv->pending_frames) == 0)
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ieee80211_sta_block_awake(priv->hw, sta, false);
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}
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rcu_read_unlock();
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ieee80211_tx_status_irqsafe(priv->hw, skb);
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}
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