diff --git a/package/kernel/mac80211/patches/566-ath9k_nfcal_xor_percal.patch b/package/kernel/mac80211/patches/566-ath9k_nfcal_xor_percal.patch
new file mode 100644
index 00000000000..917bc2d946f
--- /dev/null
+++ b/package/kernel/mac80211/patches/566-ath9k_nfcal_xor_percal.patch
@@ -0,0 +1,42 @@
+--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c
++++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
+@@ -660,7 +660,6 @@ static void ar9002_hw_olc_temp_compensat
+ static int ar9002_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan,
+ 			       u8 rxchainmask, bool longcal)
+ {
+-	bool iscaldone = true;
+ 	struct ath9k_cal_list *currCal = ah->cal_list_curr;
+ 	bool nfcal, nfcal_pending = false;
+ 	int ret;
+@@ -672,15 +671,13 @@ static int ar9002_hw_calibrate(struct at
+ 	if (currCal && !nfcal &&
+ 	    (currCal->calState == CAL_RUNNING ||
+ 	     currCal->calState == CAL_WAITING)) {
+-		iscaldone = ar9002_hw_per_calibration(ah, chan,
+-						      rxchainmask, currCal);
+-		if (iscaldone) {
+-			ah->cal_list_curr = currCal = currCal->calNext;
+-
+-			if (currCal->calState == CAL_WAITING) {
+-				iscaldone = false;
+-				ath9k_hw_reset_calibration(ah, currCal);
+-			}
++		if (!ar9002_hw_per_calibration(ah, chan, rxchainmask, currCal))
++			return 0;
++
++		ah->cal_list_curr = currCal = currCal->calNext;
++		if (currCal->calState == CAL_WAITING) {
++			ath9k_hw_reset_calibration(ah, currCal);
++			return 0;
+ 		}
+ 	}
+ 
+@@ -710,7 +707,7 @@ static int ar9002_hw_calibrate(struct at
+ 		}
+ 	}
+ 
+-	return iscaldone;
++	return 1;
+ }
+ 
+ /* Carrier leakage Calibration fix */