Re: [PATCH net-next 3/3] net: stmmac: Introducing support for Page Pool

[David Miller]

From: Jon Hunter <jonathanh@xxxxxxxxxx>
Date: Tue, 23 Jul 2019 13:09:00 +0100

> Setting "iommu.passthrough=1" works for me. However, I am not sure where
> to go from here, so any ideas you have would be great.

Then definitely we are accessing outside of a valid IOMMU mapping due
to the page pool support changes.

Such a problem should be spotted with swiommu enabled with debugging.