USB_EVENT_DEVICE_DETACH  638 dev/usb/usb.h  #define USB_EVENT_IS_DETACH(n) ((n) == USB_EVENT_CTRLR_DETACH || (n) == USB_EVENT_DEVICE_DETACH || (n) == USB_EVENT_DRIVER_DETACH)
USB_EVENT_DEVICE_DETACH 1366 dev/usb/usb_subr.c 	usbd_add_dev_event(USB_EVENT_DEVICE_DETACH, dev);