LIBUSB_TRANSFER_ERROR
return (LIBUSB_TRANSFER_ERROR);
libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_ERROR);
libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_ERROR);
libusb10_complete_transfer(pxfer0, sxfer, LIBUSB_TRANSFER_ERROR);
libusb10_complete_transfer(xfer, sxfer, LIBUSB_TRANSFER_ERROR);
libusb10_complete_transfer(NULL, sxfer, LIBUSB_TRANSFER_ERROR);