This patch is based on changes I've used for 2.5.31, 2.5.31-mm1,
2.5.32-mm1, 2.5.32-mm2, and 2.5.33-mm1.

Without the patch, 2.5.x during heavy benchmark/stress testing
eventually locks up with these final messages:

kernel: qlogicfc0 : no handle slots, this should not happen.
kernel: hostdata->queued is 6, in_ptr: 7d

This is a combination of Doug Ledford's patch:
http://marc.theaimsgroup.com/?l=linux-kernel&m=103005703808312&w=2
and Eric Weigle's patch:
http://marc.theaimsgroup.com/?l=linux-kernel&m=103005790509079&w=2

2.5.33 (and all predecessors i've tested) locked up without it.