iwlwifi: dvm: take mutex when sending SYNC BT config command

There is a flow in which we send the host command in SYNC
mode, but we don't take priv->mutex.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1046495

Cc: <stable@vger.kernel.org>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/dvm/main.c b/drivers/net/wireless/iwlwifi/dvm/main.c
index ba1b1ea..ea7e70c 100644 (file)
--- a/drivers/net/wireless/iwlwifi/dvm/main.c
+++ b/drivers/net/wireless/iwlwifi/dvm/main.c
@@ -252,13 +252,17 @@ static void iwl_bg_bt_runtime_config(struct work_struct *work)
        struct iwl_priv *priv =
                container_of(work, struct iwl_priv, bt_runtime_config);
 
+       mutex_lock(&priv->mutex);
        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
-               return;
+               goto out;
 
        /* dont send host command if rf-kill is on */
        if (!iwl_is_ready_rf(priv))
-               return;
+               goto out;
+
        iwlagn_send_advance_bt_config(priv);
+out:
+       mutex_unlock(&priv->mutex);
 }
 
 static void iwl_bg_bt_full_concurrency(struct work_struct *work)