[ES40-developers] Warning: device structures clobbered

[Hittner, D. T. <dav...@ng...>]

I had added a pointer variable to the very beginning of the DEC21143
object,
and was trying to figure out why I was getting a crash in some queing
code that I had added,
which was dereferencing the pointer.

It turns out that my pointer variable was getting clobbered somewhere
during program execution;
however, I had no code (other than the device constructor) which
modified the variable.

When I moved the pointer variable further down into the DEC21143
structure, the crashes ceased.
I didn't try to debug where the pointer was being overwritten, just the
fact that it was being modified.

It's possible that the base CPCIDevice stucture is being rewritten, and
is overwriting
into the derived device structure. I don't know if this has any
relevance regarding various
pci device errata that we have seen, but I thought I'd let everyone know
that this happened.

Dave