--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -417,7 +417,7 @@ static void ath9k_hw_init_defaults(struc
+ AR_STA_ID1_MCAST_KSRCH;
+ ah->beacon_interval = 100;
+ ah->enable_32kHz_clock = DONT_USE_32KHZ;
+- ah->slottime = (u32) -1;
++ ah->slottime = 9;
+ ah->globaltxtimeout = (u32) -1;
+ ah->power_mode = ATH9K_PM_UNDEFINED;
+ }
--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -813,7 +813,7 @@ void ath9k_hw_init_global_settings(struc
+ if (conf->channel && conf->channel->band == IEEE80211_BAND_2GHZ)
+ acktimeout += 64 - sifstime - ah->slottime;
+
+- ath9k_hw_setslottime(ah, slottime);
++ ath9k_hw_setslottime(ah, ah->slottime);
+ ath9k_hw_set_ack_timeout(ah, acktimeout);
+ ath9k_hw_set_cts_timeout(ah, acktimeout);
+ if (ah->globaltxtimeout != (u32) -1)