openwrtv3/package/kernel/mac80211/patches/621-rt2x00-ht20_40_fix.patch

--- a/drivers/net/wireless/rt2x00/rt2800.h
+++ b/drivers/net/wireless/rt2x00/rt2800.h
@@ -2321,6 +2321,8 @@ struct mac_iveiv_entry {
 #define RFCSR30_RX_H20M			FIELD8(0x04)
 #define RFCSR30_RX_VCM			FIELD8(0x18)
 #define RFCSR30_RF_CALIBRATION		FIELD8(0x80)
+#define RF3322_RFCSR30_TX_H20M		FIELD8(0x01)
+#define RF3322_RFCSR30_RX_H20M		FIELD8(0x02)
 
 /*
  * RFCSR 31:
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -3551,8 +3551,13 @@ static void rt2800_config_channel(struct
 	    rt2x00_rf(rt2x00dev, RF5390) ||
 	    rt2x00_rf(rt2x00dev, RF5392)) {
 		rt2800_rfcsr_read(rt2x00dev, 30, &rfcsr);
-		rt2x00_set_field8(&rfcsr, RFCSR30_TX_H20M, 0);
-		rt2x00_set_field8(&rfcsr, RFCSR30_RX_H20M, 0);
+		if(rt2x00_rf(rt2x00dev, RF3322)) {
+			rt2x00_set_field8(&rfcsr, RF3322_RFCSR30_TX_H20M, conf_is_ht40(conf));
+			rt2x00_set_field8(&rfcsr, RF3322_RFCSR30_RX_H20M, conf_is_ht40(conf));
+		} else {
+			rt2x00_set_field8(&rfcsr, RFCSR30_TX_H20M, conf_is_ht40(conf));
+			rt2x00_set_field8(&rfcsr, RFCSR30_RX_H20M, conf_is_ht40(conf));
+		}
 		rt2800_rfcsr_write(rt2x00dev, 30, rfcsr);
 
 		rt2800_rfcsr_read(rt2x00dev, 3, &rfcsr);