From: Martin Blumenstingl Date: Wed, 22 Jul 2015 10:42:43 +0200 Subject: [PATCH] ath9k: Fix NF CCA limits for AR9287 and AR9227 The FreeBSD driver [0] uses the same 2G values as for the AR9280 chips. Using the same values in ath9k results in much better throughput for me. Before this patch I had a huge amount of packet loss (sometimes up to 40%) and the max transfer speed was somewhere around 5Mbit/s. With this patch applied I have zero packet loss and ten times the throughput. My device uses a AR9227 which is the PCI variant of the AR9287. [0] http://bxr.su/FreeBSD/sys/dev/ath/ath_hal/ar9002/ar9287.h Signed-off-by: Martin Blumenstingl --- --- a/drivers/net/wireless/ath/ath9k/ar9002_phy.h +++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.h @@ -610,8 +610,8 @@ #define AR_PHY_CCA_MIN_GOOD_VAL_9271_2GHZ -127 #define AR_PHY_CCA_MAX_GOOD_VAL_9271_2GHZ -116 -#define AR_PHY_CCA_NOM_VAL_9287_2GHZ -120 +#define AR_PHY_CCA_NOM_VAL_9287_2GHZ -112 #define AR_PHY_CCA_MIN_GOOD_VAL_9287_2GHZ -127 -#define AR_PHY_CCA_MAX_GOOD_VAL_9287_2GHZ -110 +#define AR_PHY_CCA_MAX_GOOD_VAL_9287_2GHZ -97 #endif