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ath9k: fix DMA stop sequence for AR9003+ 

AR93xx and newer needs to stop rx before tx to avoid getting the DMA
engine or MAC into a stuck state.
This should reduce/fix the occurence of "Failed to stop Tx DMA" logspam.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Felix Fietkau 2015-06-02 10:38:32 +02:00 committed by Kalle Valo
parent f2a800f5be
commit 300f77c08d
1 changed files with 7 additions and 5 deletions
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12
drivers/net/wireless/ath/ath9k/main.c
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@ -216,11 +216,13 @@ static bool ath_prepare_reset(struct ath_softc *sc)
ath_stop_ani(sc);
ath9k_hw_disable_interrupts(ah);
if (!ath_drain_all_txq(sc))
ret = false;
if (!ath_stoprecv(sc))
ret = false;
if (AR_SREV_9300_20_OR_LATER(ah)) {
ret &= ath_stoprecv(sc);
ret &= ath_drain_all_txq(sc);
} else {
ret &= ath_drain_all_txq(sc);
ret &= ath_stoprecv(sc);
}
return ret;
}