ath9k: fix DMA stop sequence for AR9003+

commit 300f77c 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 <[email protected]> Signed-off-by: Kalle Valo <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
hardkernel · attilaolah · May 15, 2015 · May 22, 2015 · May 22, 2015 · May 25, 2015
commit 885c15d7ea3d8d883394d81ec57758857a2b1a54
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
@@ -195,11 +195,13 @@ static bool ath_prepare_reset(struct ath_softc *sc)
 	ath9k_debug_samp_bb_mac(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;
 }