[PATCH v2] powerpc/pseries/iommu: enable_ddw incorrectly returns direct mapping for SR-IOV device

[Michael Ellerman]

On Mon, 02 Oct 2023 22:08:02 -0500, Gaurav Batra wrote:
> When a device is initialized, the driver invokes dma_supported() twice -
> first for streaming mappings followed by coherent mappings. For an
> SR-IOV device, default window is deleted and DDW created. With vPMEM
> enabled, TCE mappings are dynamically created for both vPMEM and SR-IOV
> device.  There are no direct mappings.
> 
> First time when dma_supported() is called with 64 bit mask, DDW is created
> and marked as dynamic window. The second time dma_supported() is called,
> enable_ddw() finds existing window for the device and incorrectly returns
> it as "direct mapping".
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/pseries/iommu: enable_ddw incorrectly returns direct mapping for SR-IOV device
      https://git.kernel.org/powerpc/c/3bf983e4e93ce8e6d69e9d63f52a66ec0856672e

cheers