> I'm puzzled.  So far as I can tell, the only reason for getting -EBUSY
> from a claim_interface call is because there is another driver bound to
> the interface.
Yes, and the call to usb_detach_kernel_driver_np actually solved it, but I 
was calling it on the the wrong interface   (:-(
It works now.

> Does your program open the device file before or after the firmware
> download is complete?  Perhaps you need to open (or re-open) it after
> the firmware is all sent.
I've done some tests and it doen't seem to change things.

Thanks Alan.
-- 
Guillaume Dargaud
http://www.gdargaud.net/Climbing/



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