ath9k: clean up ANI per-channel pointer checking

commit c24bd362 ("ath9k: Do not maintain ANI state per-channel")
removed per-channel handling, the code to check 'curchan' also
should be removed as never used.
Signed-off-by: Miaoqing Pan <miaoqing@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

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

@@ -126,12 +126,8 @@ static void ath9k_hw_update_mibstats(struct ath_hw *ah,
 
 static void ath9k_ani_restart(struct ath_hw *ah)
 {
-	struct ar5416AniState *aniState;
-
-	if (!ah->curchan)
-		return;
+	struct ar5416AniState *aniState = &ah->ani;
 
-	aniState = &ah->ani;
 	aniState->listenTime = 0;
 
 	ENABLE_REGWRITE_BUFFER(ah);
@@ -221,12 +217,7 @@ static void ath9k_hw_set_ofdm_nil(struct ath_hw *ah, u8 immunityLevel,
 
 static void ath9k_hw_ani_ofdm_err_trigger(struct ath_hw *ah)
 {
-	struct ar5416AniState *aniState;
-
-	if (!ah->curchan)
-		return;
-
-	aniState = &ah->ani;
+	struct ar5416AniState *aniState = &ah->ani;
 
 	if (aniState->ofdmNoiseImmunityLevel < ATH9K_ANI_OFDM_MAX_LEVEL)
 		ath9k_hw_set_ofdm_nil(ah, aniState->ofdmNoiseImmunityLevel + 1, false);
@@ -281,12 +272,7 @@ static void ath9k_hw_set_cck_nil(struct ath_hw *ah, u_int8_t immunityLevel,
 
 static void ath9k_hw_ani_cck_err_trigger(struct ath_hw *ah)
 {
-	struct ar5416AniState *aniState;
-
-	if (!ah->curchan)
-		return;
-
-	aniState = &ah->ani;
+	struct ar5416AniState *aniState = &ah->ani;
 
 	if (aniState->cckNoiseImmunityLevel < ATH9K_ANI_CCK_MAX_LEVEL)
 		ath9k_hw_set_cck_nil(ah, aniState->cckNoiseImmunityLevel + 1,
@@ -299,9 +285,7 @@ static void ath9k_hw_ani_cck_err_trigger(struct ath_hw *ah)
  */
 static void ath9k_hw_ani_lower_immunity(struct ath_hw *ah)
 {
-	struct ar5416AniState *aniState;
-
-	aniState = &ah->ani;
+	struct ar5416AniState *aniState = &ah->ani;
 
 	/* lower OFDM noise immunity */
 	if (aniState->ofdmNoiseImmunityLevel > 0 &&
@@ -329,7 +313,7 @@ void ath9k_ani_reset(struct ath_hw *ah, bool is_scanning)
 	struct ath_common *common = ath9k_hw_common(ah);
 	int ofdm_nil, cck_nil;
 
-	if (!ah->curchan)
+	if (!chan)
 		return;
 
 	BUG_ON(aniState == NULL);
@@ -416,14 +400,10 @@ static bool ath9k_hw_ani_read_counters(struct ath_hw *ah)
 
 void ath9k_hw_ani_monitor(struct ath_hw *ah, struct ath9k_channel *chan)
 {
-	struct ar5416AniState *aniState;
+	struct ar5416AniState *aniState = &ah->ani;
 	struct ath_common *common = ath9k_hw_common(ah);
 	u32 ofdmPhyErrRate, cckPhyErrRate;
 
-	if (!ah->curchan)
-		return;
-
-	aniState = &ah->ani;
 	if (!ath9k_hw_ani_read_counters(ah))
 		return;