Re: [Regression] "iommu/amd: Relax locking in dma_ops path" makes tg3 ethernet transmit queue timeout

[Joerg Roedel]

Hi Kai,

On Mon, Jun 29, 2020 at 08:33:22PM +0800, Kai-Heng Feng wrote:
> I am still seeing the issue on v5.8-rc3. The issue goes away as soon
> as "iommu=off" is added.

Can you probably help with debugging this issue? I've had no luck so far
getting my hands on a machine with tg3 hardware and an AMD IOMMU.

Regards,

        Joerg