Here's what's in my tree to make dummy_hcd do suspend and
wakeup correctly ... that is, making its emulated root hub
and gadget work more like real ones.

It's easier to do this for fake hardware than the real stuff.
But real drivers tend to need very similar changes ... :)

- Dave

p.s. This does not depend on the suspend/resume patch.
      And it doesn't do "global" suspend (of root hub).