ath5k: Always set IFS intervals on reset

 * Make sure we always set IFS timings even if no
 coverage class is set. If we don't we'll miss the
 needed changes for different bwmodes.
Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath5k/ath5k.h

@@ -1224,6 +1224,7 @@ int ath5k_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac);
 /* Helpers */
 int ath5k_hw_get_frame_duration(struct ath5k_hw *ah,
 		int len, struct ieee80211_rate *rate);
+unsigned int ath5k_hw_get_default_slottime(struct ath5k_hw *ah);
 unsigned int ath5k_hw_get_default_sifs(struct ath5k_hw *ah);
 extern int ath5k_hw_set_opmode(struct ath5k_hw *ah, enum nl80211_iftype opmode);
 void ath5k_hw_set_coverage_class(struct ath5k_hw *ah, u8 coverage_class);

drivers/net/wireless/ath/ath5k/pcu.c

@@ -129,7 +129,7 @@ int ath5k_hw_get_frame_duration(struct ath5k_hw *ah,
  *
  * @ah: The &struct ath5k_hw
  */
-static unsigned int ath5k_hw_get_default_slottime(struct ath5k_hw *ah)
+unsigned int ath5k_hw_get_default_slottime(struct ath5k_hw *ah)
 {
 	struct ieee80211_channel *channel = ah->ah_current_channel;
 	unsigned int slot_time;

drivers/net/wireless/ath/ath5k/qcu.c

@@ -652,5 +652,13 @@ int ath5k_hw_init_queues(struct ath5k_hw *ah)
 		AR5K_REG_ENABLE_BITS(ah, AR5K_DCU_GBL_IFS_MISC,
 				AR5K_DCU_GBL_IFS_MISC_TURBO_MODE);
 
+	/* If we didn't set IFS timings through
+	 * ath5k_hw_set_coverage_class make sure
+	 * we set them here */
+	if (!ah->ah_coverage_class) {
+		unsigned int slot_time = ath5k_hw_get_default_slottime(ah);
+		ath5k_hw_set_ifs_intervals(ah, slot_time);
+	}
+
 	return 0;
 }