Re: [PATCH v2 6/6] powerpc/pseries/iommu: Avoid errors when DDW starts at 0x00

[Leonardo Bras]

On Wed, 2020-06-24 at 03:24 -0300, Leonardo Bras wrote:
> As of today, enable_ddw() will return a non-null DMA address if the
> created DDW maps the whole partition. If the address is valid,
> iommu_bypass_supported_pSeriesLP() will consider iommu bypass enabled.
> 
> This can cause some trouble if the DDW happens to start at 0x00.
> 
> Instead if checking if the address is non-null, check directly if
> the DDW maps the whole partition, so it can bypass iommu.
> 
> Signed-off-by: Leonardo Bras <leobras.c@xxxxxxxxx>

This patch has a bug in it. I will rework it soon.
Please keep reviewing patches 1-5.

Best regards,
Leonardo