ath9k_hw: Fix calculation of PAPRD training power at 5Ghz

higher the chainmask, lesser the power_delta to be added
to the paprd_training_power

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 17 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
index fc9c08f513cf..8f6d11dfa371 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
@@ -83,7 +83,23 @@ static int ar9003_get_training_power_5g(struct ath_hw *ah)
         if (delta > scale)
                 return -1;
 
-        power += 2 * get_streams(common->tx_chainmask);
+        switch (get_streams(common->tx_chainmask)) {
+        case 1:
+                delta = 6;
+                break;
+        case 2:
+                delta = 4;
+                break;
+        case 3:
+                delta = 2;
+                break;
+        default:
+                delta = 0;
+                ath_dbg(common, ATH_DBG_CALIBRATE,
+                "Invalid tx-chainmask: %u\n", common->tx_chainmask);
+        }
+
+        power += delta;
         return power;
 }