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ath9k: validate the TID in the tx status information 

Occasionally the hardware can send out tx status information with the wrong
TID. In that case, the BA status cannot be trusted and the aggregate
must be retransmitted.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2010-07-11 12:48:44 +02:00 committed by John W. Linville
parent e5cbef96cf
commit b11b160def
1 changed files with 8 additions and 0 deletions
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8
drivers/net/wireless/ath/ath9k/xmit.c
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@ -355,6 +355,14 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
an = (struct ath_node *)sta->drv_priv;
tid = ATH_AN_2_TID(an, bf->bf_tidno);
/*
* The hardware occasionally sends a tx status for the wrong TID.
* In this case, the BA status cannot be considered valid and all
* subframes need to be retransmitted
*/
if (bf->bf_tidno != ts->tid)
txok = false;
isaggr = bf_isaggr(bf);
memset(ba, 0, WME_BA_BMP_SIZE >> 3);