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Commit 23bc2021 authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville
Browse files

ath9k: fix an RCU issue in calling ieee80211_get_tx_rates 



ath_txq_schedule is called outside of the drv_tx call, so it needs RCU
protection.

Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 2f2a8846

drivers/net/wireless/ath/ath9k/xmit.c

+5 −1
Original line number Diff line number Diff line
@@ -1570,6 +1570,8 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) 
	    txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH)

		return;



	rcu_read_lock();



	ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list);

	last_ac = list_entry(txq->axq_acq.prev, struct ath_atx_ac, list);
@@ -1608,8 +1610,10 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) 


		if (ac == last_ac ||

		    txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH)

			return;

			break;

	}



	rcu_read_unlock();

}



/***********/