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eac3646fcd
Implement ieee80211_handle_wake_tx_queue() and ieee80211_tx_dequeue_ni() while looking at the code. They are needed by various wireless drivers. Introduce an ltxq lock and protect the skbq by that. This prevents panics due to a race between a driver upcall and the net80211 tx downcall. While the former should be rcu protected we cannot rely on that. It remains questionable if we need to protect further fields there (with a different lock?). Also introduce a txq_mtx on the lhw which needs to be further deployed but we need to come up with a good strategy to not end up with 7 different locks. Sponsored by: The FreeBSD Foundation PR: 274178, 275710 Tested by: cc MFC after: 3 days |
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