HelenOS sources

usbhc_unregister_endpoint  179 uspace/lib/drv/include/usbhc_iface.h extern errno_t usbhc_unregister_endpoint(async_exch_t *, const usb_pipe_desc_t *);
usbhc_unregister_endpoint  454 uspace/lib/usbdev/src/pipes.c 	const errno_t ret = usbhc_unregister_endpoint(exch, &pipe->desc);