ath9k: Fix temperature compensation

The registers for temperature compensation need to
be programmed only for active chains. Use the TX chainmask
to make sure that this is done properly for QCA953x.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ar9003_eeprom.c

@@ -4792,43 +4792,54 @@ static void ar9003_hw_power_control_override(struct ath_hw *ah,
 
 tempslope:
 	if (AR_SREV_9550(ah) || AR_SREV_9531(ah)) {
+		u8 txmask = (eep->baseEepHeader.txrxMask & 0xf0) >> 4;
+
 		/*
 		 * AR955x has tempSlope register for each chain.
 		 * Check whether temp_compensation feature is enabled or not.
 		 */
 		if (eep->baseEepHeader.featureEnable & 0x1) {
 			if (frequency < 4000) {
-				REG_RMW_FIELD(ah, AR_PHY_TPC_19,
-					      AR_PHY_TPC_19_ALPHA_THERM,
-					      eep->base_ext2.tempSlopeLow);
-				REG_RMW_FIELD(ah, AR_PHY_TPC_19_B1,
-					      AR_PHY_TPC_19_ALPHA_THERM,
-					      temp_slope);
-				REG_RMW_FIELD(ah, AR_PHY_TPC_19_B2,
-					      AR_PHY_TPC_19_ALPHA_THERM,
-					      eep->base_ext2.tempSlopeHigh);
+				if (txmask & BIT(0))
+					REG_RMW_FIELD(ah, AR_PHY_TPC_19,
+						      AR_PHY_TPC_19_ALPHA_THERM,
+						      eep->base_ext2.tempSlopeLow);
+				if (txmask & BIT(1))
+					REG_RMW_FIELD(ah, AR_PHY_TPC_19_B1,
+						      AR_PHY_TPC_19_ALPHA_THERM,
+						      temp_slope);
+				if (txmask & BIT(2))
+					REG_RMW_FIELD(ah, AR_PHY_TPC_19_B2,
+						      AR_PHY_TPC_19_ALPHA_THERM,
+						      eep->base_ext2.tempSlopeHigh);
 			} else {
-				REG_RMW_FIELD(ah, AR_PHY_TPC_19,
-					      AR_PHY_TPC_19_ALPHA_THERM,
-					      temp_slope);
-				REG_RMW_FIELD(ah, AR_PHY_TPC_19_B1,
-					      AR_PHY_TPC_19_ALPHA_THERM,
-					      temp_slope1);
-				REG_RMW_FIELD(ah, AR_PHY_TPC_19_B2,
-					      AR_PHY_TPC_19_ALPHA_THERM,
-					      temp_slope2);
+				if (txmask & BIT(0))
+					REG_RMW_FIELD(ah, AR_PHY_TPC_19,
+						      AR_PHY_TPC_19_ALPHA_THERM,
+						      temp_slope);
+				if (txmask & BIT(1))
+					REG_RMW_FIELD(ah, AR_PHY_TPC_19_B1,
+						      AR_PHY_TPC_19_ALPHA_THERM,
+						      temp_slope1);
+				if (txmask & BIT(2))
+					REG_RMW_FIELD(ah, AR_PHY_TPC_19_B2,
+						      AR_PHY_TPC_19_ALPHA_THERM,
+						      temp_slope2);
 			}
 		} else {
 			/*
 			 * If temp compensation is not enabled,
 			 * set all registers to 0.
 			 */
-			REG_RMW_FIELD(ah, AR_PHY_TPC_19,
-				      AR_PHY_TPC_19_ALPHA_THERM, 0);
-			REG_RMW_FIELD(ah, AR_PHY_TPC_19_B1,
-				      AR_PHY_TPC_19_ALPHA_THERM, 0);
-			REG_RMW_FIELD(ah, AR_PHY_TPC_19_B2,
-				      AR_PHY_TPC_19_ALPHA_THERM, 0);
+			if (txmask & BIT(0))
+				REG_RMW_FIELD(ah, AR_PHY_TPC_19,
+					      AR_PHY_TPC_19_ALPHA_THERM, 0);
+			if (txmask & BIT(1))
+				REG_RMW_FIELD(ah, AR_PHY_TPC_19_B1,
+					      AR_PHY_TPC_19_ALPHA_THERM, 0);
+			if (txmask & BIT(2))
+				REG_RMW_FIELD(ah, AR_PHY_TPC_19_B2,
+					      AR_PHY_TPC_19_ALPHA_THERM, 0);
 		}
 	} else {
 		REG_RMW_FIELD(ah, AR_PHY_TPC_19,