Pass transfer_buffer to gadget drivers

[Andrey Konovalov]

Hi Alan,

I've noticed that when the host performs a control request,
urb->transfer_buffer/transfer_buffer_length are not passed to the
gadget drivers via the setup() call, the only thing that is passed is
the usb_ctrlrequest struct. Is there a way to get the transfer_buffer
from within a gadget driver? If not, what approach would the best to
implement this?

Thanks!