diff --git a/drivers/net/wireless/ath/ath9k/eeprom_4k.c b/drivers/net/wireless/ath/ath9k/eeprom_4k.c
index 41a77d1bd439..e25a2abbf561 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom_4k.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_4k.c
@@ -249,6 +249,7 @@ static void ath9k_hw_get_4k_gain_boundaries_pdadcs(struct ath_hw *ah,
 	struct chan_centers centers;
 #define PD_GAIN_BOUNDARY_DEFAULT 58;
 
+	memset(&minPwrT4, 0, AR9287_NUM_PD_GAINS);
 	ath9k_hw_get_channel_centers(ah, chan, &centers);
 
 	for (numPiers = 0; numPiers < availPiers; numPiers++) {
diff --git a/drivers/net/wireless/ath/ath9k/eeprom_9287.c b/drivers/net/wireless/ath/ath9k/eeprom_9287.c
index 5f3b20b54d35..39a41053705f 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom_9287.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_9287.c
@@ -250,6 +250,7 @@ static void ath9k_hw_get_ar9287_gain_boundaries_pdadcs(struct ath_hw *ah,
 	static u8 vpdTableI[AR5416_EEP4K_NUM_PD_GAINS]
 		[AR5416_MAX_PWR_RANGE_IN_HALF_DB];
 
+	memset(&minPwrT4, 0, AR9287_NUM_PD_GAINS);
 	ath9k_hw_get_channel_centers(ah, chan, &centers);
 
 	for (numPiers = 0; numPiers < availPiers; numPiers++) {
diff --git a/drivers/net/wireless/ath/ath9k/eeprom_def.c b/drivers/net/wireless/ath/ath9k/eeprom_def.c
index 7e1ed78d0e64..77b1433312cc 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom_def.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_def.c
@@ -617,6 +617,7 @@ static void ath9k_hw_get_def_gain_boundaries_pdadcs(struct ath_hw *ah,
 	int16_t minDelta = 0;
 	struct chan_centers centers;
 
+	memset(&minPwrT4, 0, AR9287_NUM_PD_GAINS);
 	ath9k_hw_get_channel_centers(ah, chan, &centers);
 
 	for (numPiers = 0; numPiers < availPiers; numPiers++) {