[PATCH] agp/amd64: Bind to unsupported devices only if AGP is present

[Lukas Wunner]

On Mon, Jun 30, 2025 at 01:10:24PM +0200, Hans de Goede wrote:
> ping? It would be good to get some consensus on how to
> fix this and move forward with a fix. Either the patch from
> this thread; or my patch:
> 
> https://lore.kernel.org/dri-devel/20250625112411.4123-1-hansg@kernel.org/
> 
> Works for me, the most important thing here is to get this
> regression fixed.

You seem to have a machine where you can trigger the
"Resources present before probing" message.

Would you mind enabling CONFIG_DEBUG_DEVRES=y and adding
"log_devres=1" to the kernel command line so that we
can understand what kind of resource is attached to
the AMD IOMMU, and where that happens.

I don't see invocations of devm_*() in arch/x86/ or
drivers/iommu/amd/ that would explain the error message.

Just so that we get a full understanding of the issue,
independently of the AGP driver probing everything.

Thanks!

Lukas