[PATCH 2.6.19] ehca: bug fix: use wqe offset instead wqe address to determine pending work requests

[Hoang-Nam Nguyen]

Hi Roland!
> OK.  After thinking about this, I'm going to queue it for 2.6.20 --
> we're _way_ too close to the 2.6.19 final release to put in patches
> that aren't either small and obvious, or fix a problem someone hit in
> real life.
That's fair. I understand your decision. And thanks for queueing for
2.6.20. Can you please brief me on patch procedures for post-2.6.19?
Regards
Nam