WiFi底层已经通了，但WiFi界面打不开WiFi
WiFi底层我通过wpa_cli命令已经可以正常扫描，连接。但WiFi界面打不开WiFi。问题打印如下：
logcat |grep wifi
05-16 15:34:03.15518411841 V SettingsProvider: Notifying for 0: content://settings/global/wifi_on
05-16 15:34:03.16817031703 E android.hardware.wifi@1.0-service: finit_module return: -1: File exists
05-16 15:34:03.16817031703 E android.hardware.wifi@1.0-service: Failed to load WiFi driver
05-16 15:34:03.16817031703 E android.hardware.wifi@1.0-service: Failed to initialize firmware mode controller
05-16 15:34:03.16817031703 E android.hardware.wifi@1.0-service: Wifi HAL start failed
05-16 15:34:03.17118411996 E BatteryExternalStatsWorker: no controller energy info supplied for wifi
05-16 15:34:03.17618412431 I WifiScanningService: wifi driver unloaded
05-16 15:34:03.17818412431 I WifiScanningService: wifi driver unloaded
05-16 15:34:03.17818411996 E BatteryExternalStatsWorker: no controller energy info supplied for wifi
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