ath9k: defer btcoex scheme update

As btcoex scheme updation might sleep, remove the function call
from tasklet context and queue it up as a separate work.

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

3 files changed, 15 insertions, 3 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 02fc1c1e5eeb..a8c050085648 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -698,6 +698,7 @@ struct ath_softc {
 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
         struct ath_btcoex btcoex;
         struct ath_mci_coex mci_coex;
+        struct work_struct mci_work;
 #endif
 
         struct ath_descdma txsdma;
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index e655f2a907b5..a6f83b683db1 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -150,6 +150,9 @@ static void __ath_cancel_work(struct ath_softc *sc)
         cancel_work_sync(&sc->hw_check_work);
         cancel_delayed_work_sync(&sc->tx_complete_work);
         cancel_delayed_work_sync(&sc->hw_pll_work);
+#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
+        cancel_work_sync(&sc->mci_work);
+#endif
 }
 
 static void ath_cancel_work(struct ath_softc *sc)
diff --git a/drivers/net/wireless/ath/ath9k/mci.c b/drivers/net/wireless/ath/ath9k/mci.c
index 92d61cc0c8e5..e53df86dfce5 100644
--- a/drivers/net/wireless/ath/ath9k/mci.c
+++ b/drivers/net/wireless/ath/ath9k/mci.c
@@ -52,7 +52,7 @@ static bool ath_mci_add_profile(struct ath_common *common,
             (info->type != MCI_GPM_COEX_PROFILE_VOICE))
                 return false;
 
-        entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+        entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
         if (!entry)
                 return false;
 
@@ -219,6 +219,13 @@ static void ath_mci_cal_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
         }
 }
 
+static void ath9k_mci_work(struct work_struct *work)
+{
+        struct ath_softc *sc = container_of(work, struct ath_softc, mci_work);
+
+        ath_mci_update_scheme(sc);
+}
+
 static void ath_mci_process_profile(struct ath_softc *sc,
                                     struct ath_mci_profile_info *info)
 {
@@ -249,7 +256,7 @@ static void ath_mci_process_profile(struct ath_softc *sc,
                 btcoex->duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
         }
 
-        ath_mci_update_scheme(sc);
+        ieee80211_queue_work(sc->hw, &sc->mci_work);
 }
 
 static void ath_mci_process_status(struct ath_softc *sc,
@@ -283,7 +290,7 @@ static void ath_mci_process_status(struct ath_softc *sc,
         } while (++i < ATH_MCI_MAX_PROFILE);
 
         if (old_num_mgmt != mci->num_mgmt)
-                ath_mci_update_scheme(sc);
+                ieee80211_queue_work(sc->hw, &sc->mci_work);
 }
 
 static void ath_mci_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
@@ -377,6 +384,7 @@ int ath_mci_setup(struct ath_softc *sc)
                          mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
                          mci->sched_buf.bf_paddr);
 
+        INIT_WORK(&sc->mci_work, ath9k_mci_work);
         ath_dbg(common, MCI, "MCI Initialized\n");
 
         return 0;