ath9k: use helper macro to kfree and nullify on ath9k_hw_rfdetach()

Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

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

@@ -266,32 +266,21 @@ ath9k_hw_set_rf_regs(struct ath_hw *ah, struct ath9k_channel *chan,
 void
 ath9k_hw_rfdetach(struct ath_hw *ah)
 {
-	kfree(ah->analogBank0Data);
-	ah->analogBank0Data = NULL;
-
-	kfree(ah->analogBank1Data);
-	ah->analogBank1Data = NULL;
-
-	kfree(ah->analogBank2Data);
-	ah->analogBank2Data = NULL;
-
-	kfree(ah->analogBank3Data);
-	ah->analogBank3Data = NULL;
-
-	kfree(ah->analogBank6Data);
-	ah->analogBank6Data = NULL;
-
-	kfree(ah->analogBank6TPCData);
-	ah->analogBank6TPCData = NULL;
-
-	kfree(ah->analogBank7Data);
-	ah->analogBank7Data = NULL;
-
-	kfree(ah->addac5416_21);
-	ah->addac5416_21 = NULL;
-
-	kfree(ah->bank6Temp);
-	ah->bank6Temp = NULL;
+#define ATH_FREE_BANK(bank) do { \
+		kfree(bank); \
+		bank = NULL; \
+	} while (0);
+
+	ATH_FREE_BANK(ah->analogBank0Data);
+	ATH_FREE_BANK(ah->analogBank1Data);
+	ATH_FREE_BANK(ah->analogBank2Data);
+	ATH_FREE_BANK(ah->analogBank3Data);
+	ATH_FREE_BANK(ah->analogBank6Data);
+	ATH_FREE_BANK(ah->analogBank6TPCData);
+	ATH_FREE_BANK(ah->analogBank7Data);
+	ATH_FREE_BANK(ah->addac5416_21);
+	ATH_FREE_BANK(ah->bank6Temp);
+#undef ATH_FREE_BANK
 }
 
 bool ath9k_hw_init_rf(struct ath_hw *ah, int *status)