- An oopsable bug affecting unlink of interrupt
     transfers. Fix mirrors one done ages ago for ISO.
     (Original patch by Matt Hughes)
   - Better cleanup on init failure (Matthew Frederickson)
   - fixes the problem Stuart reported, where interrupt urbs
     couldn't be unlinked from their completion handlers, and it
     also makes OHCI return the correct status code for async
     unlink requests (-EINPROGRESS not zero).