HelenOS sources

usb_pipe_unregister  111 uspace/lib/usbdev/include/usb/dev/pipes.h errno_t usb_pipe_unregister(usb_pipe_t *);
usb_pipe_unregister  293 uspace/lib/usbdev/src/devdrv.c 			usb_pipe_unregister(&pipes[i].pipe);
usb_pipe_unregister  351 uspace/lib/usbdev/src/devdrv.c 	const int rc = usb_pipe_unregister(&epm->pipe);