gaia.js

if (wifiManager) {
  this._suspend('wifi');
  
  // make sure ril.ignore.mutex is set before turning off wifi-tethering
  var req = SettingsListener.getSettingsLock().set({
    'ril.ignore.mutex': true
  });
  
  req.onsuccess = function() {
    SettingsListener.getSettingsLock().set({
      'tethering.wifi.enabled': false
    });
  };
  
  req.onerror = function() {
    console.log('Something went wrong');
  };
}