Periodically folk have run into problems where usb-ohci oopses
  due to device refcount bugs ...
    
  This is a minor patch to move the sanity check out of usb-ohci
  into the generic bits of usbcore.    There are comments that
  suggest a path for a more comprehensive approach too.
    
  Applies cleanly against 2.5.7 and I've been testing with it
  for a while.  I can't think of any reason it shouldn't also go
  into 2.4, beyond the patch not applying cleanly there ... :)