diff --git a/[refs] b/[refs]
index 85a9c5c3250e..2f2ca6a83d87 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1e5023c7cc11158f74a637aa92897da954572a25
+refs/heads/master: a6952287942a13831502838d47e268d05c21c48f
diff --git a/trunk/drivers/net/wireless/ath/ath9k/dfs_pattern_detector.c b/trunk/drivers/net/wireless/ath/ath9k/dfs_pattern_detector.c
index 3b129143653f..24877b00cbf4 100644
--- a/trunk/drivers/net/wireless/ath/ath9k/dfs_pattern_detector.c
+++ b/trunk/drivers/net/wireless/ath/ath9k/dfs_pattern_detector.c
@@ -42,10 +42,15 @@ struct radar_types {
 #define MIN_PPB_THRESH	50
 #define PPB_THRESH(PPB) ((PPB * MIN_PPB_THRESH + 50) / 100)
 #define PRF2PRI(PRF) ((1000000 + PRF / 2) / PRF)
+/* percentage of pulse width tolerance */
+#define WIDTH_TOLERANCE 5
+#define WIDTH_LOWER(X) ((X*(100-WIDTH_TOLERANCE)+50)/100)
+#define WIDTH_UPPER(X) ((X*(100+WIDTH_TOLERANCE)+50)/100)
 
 #define ETSI_PATTERN(ID, WMIN, WMAX, PMIN, PMAX, PRF, PPB)	\
 {								\
-	ID, WMIN, WMAX, (PRF2PRI(PMAX) - PRI_TOLERANCE),	\
+	ID, WIDTH_LOWER(WMIN), WIDTH_UPPER(WMAX),		\
+	(PRF2PRI(PMAX) - PRI_TOLERANCE),			\
 	(PRF2PRI(PMIN) * PRF + PRI_TOLERANCE), PRF, PPB * PRF,	\
 	PPB_THRESH(PPB), PRI_TOLERANCE,				\
 }