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[PATCH 3/9] ath9k: force rx_clear when disabling rx

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From: Felix Fietkau <nbd@xxxxxxxxxxx>

This makes stopping Rx more reliable and should reduce the frequency of
Rx related DMA stop warnings. Don't use rx_clear in TX99 mode.

Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Helmut Schaa <helmut.schaa@xxxxxxxxxxxxxx>
---
 drivers/net/wireless/ath/ath9k/mac.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 58d02c19b6d0..c9d2bf3fa135 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -678,13 +678,18 @@ void ath9k_hw_startpcureceive(struct ath_hw *ah, bool is_scanning)
 
 	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);
+	u32 reg = AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT;
+
+	if (!IS_ENABLED(CPTCFG_ATH9K_TX99))
+		reg |= AR_DIAG_FORCE_RX_CLEAR;
+	REG_SET_BIT(ah, AR_DIAG_SW, reg);
 
 	ath9k_hw_disable_mib_counters(ah);
 }
-- 
2.17.0




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