Re: Trying to access the Expansion ROM of a video card

[Taylor R Campbell <campbell+netbsd-tech-kern%mumble.net@localhost>]

> Date: Wed, 20 Oct 2021 08:26:25 +0000
> From: Riza Dindir <riza.dindir%gmail.com@localhost>
> 
> The bus_space_map function returns code 35. Maybe I am doing something
> wrong in the code when I try to read the "expansion rom" of the pci
> card. Anyone has an idea? How should I read the "expansion rom" of a
> PCI card?

35 is EAGAIN, which means something already has it mapped.  Gotta
track down who else has already mapped it -- might stick a
db_stacktrace in bus_space_map conditional on covering this address.