Xen devel - Mar 2012 - BLKTAP2_IOCTL_CREATE_DEVICE vs. struct blktap2_params' name member

What is the purpose of the name member? And why is it that it''s being
left uninitialized (causing the kernel driver to print garbage [in the
2.6.18 driver''s blktap_validate_params()] or even fail [in
pv-ops''
blktap_device_validate_params()]) in tapdisk_control_open_image()?

Thanks, Jan