diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 6e3d838..4f8c905 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -190,6 +190,19 @@ static int ath_update_survey_stats(struct ath_softc *sc)
 	if (!ah->curchan)
 		return -1;
 
+	/* just to make pos does not exceeds ATH9K_NUM_CHANNELS - 1 */
+	if (pos > 37) {
+		WARN_ON(1);
+		printk("\npos is %d index out of bounds!!! in %s", pos, __func__);
+		return -1;
+	}
+
+	if (!survey) {
+		WARN_ON(1);
+		printk("\nNULL pointer for survey !!! in %s", __func__);
+		return -1;
+	}
+
 	if (ah->power_mode == ATH9K_PM_AWAKE)
 		ath_hw_cycle_counters_update(common);