SBP2_MAXPHYS, which is defined as 0xffff in sbp2reg.h, is a max data
size can be represented without using page table in ORB, right?.  It
is used so in sbp2_runcmd().  But it is also used in sbpscsi_minphys()
to limit transfer size.

The latter usage is simply wrong, isn't it?  It actually prevents 64k
xfer from sd connected via ieee1394.

enami.