ath9k: flush bt profile whenever it is requested

Before processing BT profiles or status messages, check whether
it is requested to flush BT profile. Otherwise it might increase
number of BT profiles that affects the WLAN performance. Also
flush the profiles when MCI is recovering from broken rx. After
flushing BT profiles, query BT topology to refetch them.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 18 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mci.c b/drivers/net/wireless/ath/ath9k/ar9003_mci.c
index f6eb43ee87ee..8d8df4b2c386 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_mci.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mci.c
@@ -1236,6 +1236,10 @@ u32 ar9003_mci_state(struct ath_hw *ah, u32 state_type)
         case MCI_STATE_NEED_FTP_STOMP:
                 value = !(mci->config & ATH_MCI_CONFIG_DISABLE_FTP_STOMP);
                 break;
+        case MCI_STATE_NEED_FLUSH_BT_INFO:
+                value = (!mci->unhalt_bt_gpm && mci->need_flush_btinfo) ? 1 : 0;
+                mci->need_flush_btinfo = false;
+                break;
         default:
                 break;
         }
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mci.h b/drivers/net/wireless/ath/ath9k/ar9003_mci.h
index f3bef8d69edd..30acf2869aa4 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_mci.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mci.h
@@ -200,6 +200,7 @@ enum mci_state_type {
         MCI_STATE_RECOVER_RX,
         MCI_STATE_NEED_FTP_STOMP,
         MCI_STATE_DEBUG,
+        MCI_STATE_NEED_FLUSH_BT_INFO,
         MCI_STATE_MAX
 };
 
@@ -211,7 +212,8 @@ enum mci_gpm_coex_opcode {
         MCI_GPM_COEX_WLAN_CHANNELS,
         MCI_GPM_COEX_BT_PROFILE_INFO,
         MCI_GPM_COEX_BT_STATUS_UPDATE,
-        MCI_GPM_COEX_BT_UPDATE_FLAGS
+        MCI_GPM_COEX_BT_UPDATE_FLAGS,
+        MCI_GPM_COEX_NOOP,
 };
 
 #define MCI_GPM_NOMORE  0
diff --git a/drivers/net/wireless/ath/ath9k/mci.c b/drivers/net/wireless/ath/ath9k/mci.c
index 8f0e8d9c2054..3a400c83c077 100644
--- a/drivers/net/wireless/ath/ath9k/mci.c
+++ b/drivers/net/wireless/ath/ath9k/mci.c
@@ -80,6 +80,7 @@ void ath_mci_flush_profile(struct ath_mci_profile *mci)
         struct ath_mci_profile_info *info, *tinfo;
 
         mci->aggr_limit = 0;
+        mci->num_mgmt = 0;
 
         if (list_empty(&mci->info))
                 return;
@@ -328,6 +329,13 @@ static void ath_mci_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
         u8 major, minor;
         u32 seq_num;
 
+        if (ar9003_mci_state(ah, MCI_STATE_NEED_FLUSH_BT_INFO) &&
+            ar9003_mci_state(ah, MCI_STATE_ENABLE)) {
+                ath_dbg(common, MCI, "(MCI) Need to flush BT profiles\n");
+                ath_mci_flush_profile(&sc->btcoex.mci);
+                ar9003_mci_state(ah, MCI_STATE_SEND_STATUS_QUERY);
+        }
+
         switch (opcode) {
         case MCI_GPM_COEX_VERSION_QUERY:
                 ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_COEX_VERSION);
@@ -568,9 +576,11 @@ void ath_mci_intr(struct ath_softc *sc)
         }
 
         if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
-            (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT))
+            (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
                 mci_int &= ~(AR_MCI_INTERRUPT_RX_INVALID_HDR |
                              AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT);
+                ath_mci_msg(sc, MCI_GPM_COEX_NOOP, NULL);
+        }
 }
 
 void ath_mci_enable(struct ath_softc *sc)