[PATCH 08/12] ath9k: Adjust the chainmasks properly

[Sujith <Sujith.Manoharan@atheros.com>]

From: Senthil Balasubramanian <senthilkumar@atheros.com>

This is needed to account for the number of chains in use,
not just the number of chains present.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
---
 drivers/net/wireless/ath/ath9k/calib.c |   20 +++++++++++++++-----
 1 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c
index 439f2c7..22a3a69 100644
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -609,14 +609,24 @@ void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
 		AR_PHY_CH1_EXT_CCA,
 		AR_PHY_CH2_EXT_CCA
 	};
-	u8 chainmask;
+	u8 chainmask, rx_chain_status;
 
+	rx_chain_status = REG_READ(ah, AR_PHY_RX_CHAINMASK);
 	if (AR_SREV_9285(ah))
 		chainmask = 0x9;
-	else if (AR_SREV_9280(ah) || AR_SREV_9287(ah))
-		chainmask = 0x1B;
-	else
-		chainmask = 0x3F;
+	else if (AR_SREV_9280(ah) || AR_SREV_9287(ah)) {
+		if ((rx_chain_status & 0x2) || (rx_chain_status & 0x4))
+			chainmask = 0x1B;
+		else
+			chainmask = 0x09;
+	} else {
+		if (rx_chain_status & 0x4)
+			chainmask = 0x3F;
+		else if (rx_chain_status & 0x2)
+			chainmask = 0x1B;
+		else
+			chainmask = 0x09;
+	}
 
 	h = ah->nfCalHist;
 
-- 
1.6.4.3