ath9k_hw: fix spur mitigation issues on AR934x

Do not subtract spur power from noise floor on this chip, as it can lead
to packet loss and other connectivity issues.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.c b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
index 2bf6548dd143..e1714d7c9eeb 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
@@ -334,7 +334,8 @@ static void ar9003_hw_spur_ofdm(struct ath_hw *ah,
         REG_RMW_FIELD(ah, AR_PHY_SPUR_REG,
                       AR_PHY_SPUR_REG_EN_VIT_SPUR_RSSI, 1);
 
-        if (REG_READ_FIELD(ah, AR_PHY_MODE,
+        if (!AR_SREV_9340(ah) &&
+            REG_READ_FIELD(ah, AR_PHY_MODE,
                            AR_PHY_MODE_DYNAMIC) == 0x1)
                 REG_RMW_FIELD(ah, AR_PHY_SPUR_REG,
                               AR_PHY_SPUR_REG_ENABLE_NF_RSSI_SPUR_MIT, 1);