From 6a7d5004e3fefb0f50ddc1262984cae00c92e72a Mon Sep 17 00:00:00 2001
From: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Date: Mon, 10 Sep 2012 17:05:09 +0530
Subject: [PATCH 235/237] ath9k_hw: Wait BT calibration to complete

Whenever BT calibration requested, WLAN has to wait for the
calibration to be completed. But right now we defer the waiting
which might cause BT calibration to fail. Fix that.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
---
 drivers/net/wireless/ath/ath9k/ar9003_mci.c |  1 +
 drivers/net/wireless/ath/ath9k/debug.h      |  1 -
 drivers/net/wireless/ath/ath9k/mci.c        | 19 ++++++++++++++++++-
 3 files changed, 19 insertions(+), 2 deletions(-)

--- a/drivers/net/wireless/ath/ath9k/ar9003_mci.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mci.c
@@ -714,6 +714,7 @@ bool ar9003_mci_start_reset(struct ath_h
 
 	return true;
 }
+EXPORT_SYMBOL(ar9003_mci_start_reset);
 
 int ar9003_mci_end_reset(struct ath_hw *ah, struct ath9k_channel *chan,
 			 struct ath9k_hw_cal_data *caldata)
--- a/drivers/net/wireless/ath/ath9k/debug.h
+++ b/drivers/net/wireless/ath/ath9k/debug.h
@@ -41,7 +41,6 @@ enum ath_reset_type {
 	RESET_TYPE_PLL_HANG,
 	RESET_TYPE_MAC_HANG,
 	RESET_TYPE_BEACON_STUCK,
-	RESET_TYPE_MCI,
 	__RESET_TYPE_MAX
 };
 
--- a/drivers/net/wireless/ath/ath9k/mci.c
+++ b/drivers/net/wireless/ath/ath9k/mci.c
@@ -191,6 +191,23 @@ skip_tuning:
 	ath9k_btcoex_timer_resume(sc);
 }
 
+static void ath_mci_wait_btcal_done(struct ath_softc *sc)
+{
+	struct ath_hw *ah = sc->sc_ah;
+
+	/* Stop tx & rx */
+	ieee80211_stop_queues(sc->hw);
+	ath_stoprecv(sc);
+	ath_drain_all_txq(sc, false);
+
+	/* Wait for cal done */
+	ar9003_mci_start_reset(ah, ah->curchan);
+
+	/* Resume tx & rx */
+	ath_startrecv(sc);
+	ieee80211_wake_queues(sc->hw);
+}
+
 static void ath_mci_cal_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
 {
 	struct ath_hw *ah = sc->sc_ah;
@@ -202,7 +219,7 @@ static void ath_mci_cal_msg(struct ath_s
 	case MCI_GPM_BT_CAL_REQ:
 		if (mci_hw->bt_state == MCI_BT_AWAKE) {
 			ar9003_mci_state(ah, MCI_STATE_SET_BT_CAL_START);
-			ath9k_queue_reset(sc, RESET_TYPE_MCI);
+			ath_mci_wait_btcal_done(sc);
 		}
 		ath_dbg(common, MCI, "MCI State : %d\n", mci_hw->bt_state);
 		break;
