- int (*f)(jtag_libusb_device_handle *, int, char *, int, int),
- jtag_libusb_device_handle *dev, int ep,
- char *bytes, int size, int timeout)
+ int (*f)(libusb_device_handle *, int, char *, int, int, int *),
+ libusb_device_handle *dev, int ep,
+ char *bytes, int size, int timeout, int *transferred)