This patch fixes the cpqfc passthrough ioctl for 2.5.30.

One question... Is it possible for a user app, by abusing
a upperlevel driver (e.g. the sg driver) to put a bogus
value into Scsi_Request->upper_level_private?

This patch kind of depends on this being impossible.

If it is possible, maybe it's better if I find another way
to identify passthrough commands on completion than what
this patch does.  e.g. keep a list of the passthru Scsi_Requests
that are outstanding, then search the list on each completion...(yuck.)

-- steve