> > > +#define MINPHYS (20*1024) > > > > This makes no sense. If you want to override MINPHYS, you need to > > override for the whole kernel, not only here. > > MINPHYS is just a name I have chosen. It is not used anywhere else in the > kernel. You are confusing this with MAXPHYS.
Oops, you're right. Sorry about the confusion. > sc->sc_xfer_max is computed according to the host's capabilities. What I > want to simulate with this diff is a host adapter that can only cope with > transfers < 64k == MAXPHYS. Back to your original problem, you might want to print the sc_link struct as well the scsi_adapter struct it points to, when you detect a transfer larger than MAXPHYS. It has likely been overriden or reset to NULL by mistake at some point.
