ah.. and btw (sorry for the spam!) it would be nice if we could change the behavior if the physmap function in the case of len=0. the kernel interface has a nice property in this regard: http://www.aoc.nrao.edu/~tjuerges/ALMA/Kernel/2.6.29.4/deviceiobook/re04.htm... "If you want to get access to the complete BAR without checking for its length first, pass 0." i am not sure how the actual length is read out, but lspci shows it too so it cant be that hard... would you take a patch for that?