Comment 241 for bug 1667750

Created attachment 285709
Patch handling halted endpoints at completion of stop endpoint command

Patch to handle a context state error at stop endpoint completion
where a endpoint TRB processing had a error/stall, and hardware halted the
endpoint just before completing normal stop endpoint command.

This won't fix the initial issue about endpoint not restarting after
soft retry, but it should resolve the flood of "WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state" messages

Code is completely untested as I can't trigger this codepath manually.
It requires hardware halting a endpoint just before completing a stop
endpoint command