[Linux-fbdev-devel] Re: Who is stomping PCI config space?

[Benjamin Herrenschmidt]

> How do we deal with interrupts from VGA cards that we don't have a 
> driver for? 

We don't get any, do we ? If we get an interrupt we don't have a driver
for, the system dies usually ;) Well, unless it's an edge interrupt, in
which case we can just drop it on the floor, but PCI interrupts are
level.

> We don't service interrupts in this case either.
> Can't we unregister the interrupt handler until everything
> is set up right? Maybe a dump idea...
> Also there is a generic VGA register to control interrupts.

We have reached the end of my VGA knowledge, but I seriously doubt a VGA
card will issue interrupts if not previously programmed to do so... So
we probably don't have to bother. We only care about interrupts that we
have a use for, that is interrupts triggered by cards upon request of
their driver, for things like DMA/AGP command buffer operations, vblank,
monitor detection, ...

Ben.