mac80211: fix purging multicast PS buffer queue
The code currently assumes that buffered multicast PS frames don't have a pending ACK frame for tx status reporting. However, hostapd sends a broadcast deauth frame on teardown for which tx status is requested. This can lead to the "Have pending ack frames" warning on module reload. Fix this by using ieee80211_free_txskb/ieee80211_purge_tx_queue. Cc: stable@vger.kernel.org Signed-off-by: NFelix Fietkau <nbd@nbd.name> Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
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