+From: Felix Fietkau <nbd@openwrt.org>
+Date: Sun, 7 Jun 2015 13:53:35 +0200
+Subject: [PATCH] ath9k: force rx_clear when disabling rx
+
+This makes stopping Rx more reliable and should reduce the frequency of
+Rx related DMA stop warnings
+
+Cc: stable@vger.kernel.org
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/mac.c
++++ b/drivers/net/wireless/ath/ath9k/mac.c
+@@ -677,13 +677,15 @@ void ath9k_hw_startpcureceive(struct ath
+
+ ath9k_ani_reset(ah, is_scanning);
+
+- REG_CLR_BIT(ah, AR_DIAG_SW, (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
++ REG_CLR_BIT(ah, AR_DIAG_SW,
++ AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT | AR_DIAG_FORCE_RX_CLEAR);
+ }
+ EXPORT_SYMBOL(ath9k_hw_startpcureceive);
+
+ void ath9k_hw_abortpcurecv(struct ath_hw *ah)
+ {
+- REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RX_ABORT | AR_DIAG_RX_DIS);
++ REG_SET_BIT(ah, AR_DIAG_SW,
++ AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT | AR_DIAG_FORCE_RX_CLEAR);
+
+ ath9k_hw_disable_mib_counters(ah);
+ }