ath9k: Fix issues in the main btcoex timer

* ath9k_mci_update_rssi() is required only for
  cards that use MCI scheme. Make sure that it
  is not called for 3-wire cards.

* Call ath9k_ps_wakeup() early since register
  accesses are made in ath9k_mci_update_rssi().

* Fix usage of btcoex_lock to handle no_stomp_timer.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath9k/gpio.c

@@ -202,17 +202,16 @@ static void ath_btcoex_period_timer(unsigned long data)
 	}
 	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 
-	ath9k_mci_update_rssi(sc);
-
 	ath9k_ps_wakeup(sc);
+	spin_lock_bh(&btcoex->btcoex_lock);
 
-	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
-		ath_detect_bt_priority(sc);
-
-	if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
+	if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) {
+		ath9k_mci_update_rssi(sc);
 		ath_mci_ftp_adjust(sc);
+	}
 
-	spin_lock_bh(&btcoex->btcoex_lock);
+	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
+		ath_detect_bt_priority(sc);
 
 	stomp_type = btcoex->bt_stomp_type;
 	timer_period = btcoex->btcoex_no_stomp;
@@ -252,9 +251,6 @@ static void ath_btcoex_no_stomp_timer(unsigned long arg)
 	struct ath_softc *sc = (struct ath_softc *)arg;
 	struct ath_hw *ah = sc->sc_ah;
 	struct ath_btcoex *btcoex = &sc->btcoex;
-	struct ath_common *common = ath9k_hw_common(ah);
-
-	ath_dbg(common, BTCOEX, "no stomp timer running\n");
 
 	ath9k_ps_wakeup(sc);
 	spin_lock_bh(&btcoex->btcoex_lock);