get opb answer in device driver

[matthias]

I'm working on a virtex2pro with a ppc405 core.
I'm implementing a peripheral device and the corresponding device
driver. As I get a rare behaviour on my device I would like to get the
answer from it to a read/write request.

Is there any possibility to get the the answer of an opb-device
(wether it is error or retry) inside a device driver to handle it?

best regards,
Matthias