rtl8188eu kills usb host

[TaeheeYoo]

I guess the rtl8188eu driver kills usb host driver.

log messages are following:
Feb 6 15:56:55 ap-MacBookAir kernel: [53545.990922] xhci_hcd 0000:00:14.0: Assuming host is dying, halting host.
Feb 6 15:56:55 ap-MacBookAir kernel: [53545.990993] rtl_usb: reg 0x820, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x1000100
Feb 6 15:56:55 ap-MacBookAir kernel: [53545.991001] rtl_usb: reg 0xc80, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x83040000
Feb 6 15:56:55 ap-MacBookAir kernel: [53545.994063] usb 1-1: USB disconnect, device number 2
Feb 6 15:56:55 ap-MacBookAir kernel: [53546.079565] usb 1-2: USB disconnect, device number 3
Feb 6 15:56:55 ap-MacBookAir kernel: [53546.079574] usb 1-2.1: USB disconnect, device number 5

"Assuming host is dying, halting host." log message in the xhci_stop_endpoint_command_watchdog()