629a0b065a
The documentation says the write should return the number of bytes not written on an error (0 means everything was written). Read provides a buffer length and the return value should be the buffer length - bytes actually read. Remove the incorrect FIXME's and return the correct values. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>