Re: [PATCH v4 3/7] of: Allow the iommu-map property to omit untranslated devices

[Rob Herring <robh@kernel.org>]

On Thu, 15 Nov 2018 16:52:30 +0000, Jean-Philippe Brucker wrote:
> In PCI root complex nodes, the iommu-map property describes the IOMMU that
> translates each endpoint. On some platforms, the IOMMU itself is presented
> as a PCI endpoint (e.g. AMD IOMMU and virtio-iommu). This isn't supported
> by the current OF driver, which expects all endpoints to have an IOMMU.
> Allow the iommu-map property to have gaps.
> 
> Relaxing of_map_rid() also allows the msi-map property to have gaps, which
> is invalid since MSIs always reach an MSI controller. In that case
> pci_msi_setup_msi_irqs() will return an error when attempting to find the
> device's MSI domain.
> 
> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
> ---
>  drivers/of/base.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>