From: Felix Fietkau <nbd@xxxxxxxxxxx>
3.4.110-rc1 review patch. If anyone has any objections, please let me know.
------------------
commit 300f77c08ded96d33f492aaa02549103852f0c12 upstream.
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.
Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
[lizf: Backported to 3.4:
- initialize ret
- ath_drain_all_txq() takes a second argument]
Signed-off-by: Zefan Li <lizefan@xxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/main.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index ef26056..7e7bd15 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -235,7 +235,7 @@ static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
- bool ret;
+ bool ret = true;
ieee80211_stop_queues(sc->hw);
@@ -245,10 +245,13 @@ static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
ath9k_debug_samp_bb_mac(sc);
ath9k_hw_disable_interrupts(ah);
- ret = ath_drain_all_txq(sc, retry_tx);
-
- if (!ath_stoprecv(sc))
- ret = false;
+ if (AR_SREV_9300_20_OR_LATER(ah)) {
+ ret &= ath_stoprecv(sc);
+ ret &= ath_drain_all_txq(sc, retry_tx);
+ } else {
+ ret &= ath_drain_all_txq(sc, retry_tx);
+ ret &= ath_stoprecv(sc);
+ }
if (!flush) {
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
--
1.9.1
--
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