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ath9k: fix rx flush handling

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Right now the rx flush is not doing anything useful on AR9003+, as it only
works if the buffers in the rx FIFO have not been purged yet, as is done
by ath_stoprecv.

To fix this, always call ath_flushrecv from within ath_stoprecv before
the FIFO is emptied, but still after the hw receive path has been stopped.

This ensures that frames received (and ACKed by the hardware) shortly before
a reset will be seen by the software, which should improve A-MPDU session
stability.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau
2013-01-09 16:16:56 +01:00
committed by John W. Linville
parent 7fc00a3054
commit 4b883f021b
3 changed files with 12 additions and 21 deletions
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16
drivers/net/wireless/ath/ath9k/recv.c
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@@ -472,6 +472,13 @@ start_recv:
return 0;
}
static void ath_flushrecv(struct ath_softc *sc)
{
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ath_rx_tasklet(sc, 1, true);
ath_rx_tasklet(sc, 1, false);
}
bool ath_stoprecv(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
@@ -482,6 +489,8 @@ bool ath_stoprecv(struct ath_softc *sc)
ath9k_hw_setrxfilter(ah, 0);
stopped = ath9k_hw_stopdmarecv(ah, &reset);
ath_flushrecv(sc);
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ath_edma_stop_recv(sc);
else
@@ -498,13 +507,6 @@ bool ath_stoprecv(struct ath_softc *sc)
return stopped && !reset;
}
void ath_flushrecv(struct ath_softc *sc)
{
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ath_rx_tasklet(sc, 1, true);
ath_rx_tasklet(sc, 1, false);
}
static bool ath_beacon_dtim_pending_cab(struct sk_buff *skb)
{
/* Check whether the Beacon frame has DTIM indicating buffered bc/mc */