On 2019/5/20 14:57, Christoph Hellwig wrote:
> IOMMU_FWSPEC_PCI_RC_ATS is only defined if CONFIG_IOMMU_API is
> enabled.
>
> Fixes: 5702ee24182f ("ACPI/IORT: Check ATS capability in root complex nodes")
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> drivers/acpi/arm64/iort.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
> index 9058cb084b91..3e542b5d2a2d 100644
> --- a/drivers/acpi/arm64/iort.c
> +++ b/drivers/acpi/arm64/iort.c
> @@ -1074,9 +1074,10 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
> info.node = node;
> err = pci_for_each_dma_alias(to_pci_dev(dev),
> iort_pci_iommu_init, &info);
> -
> +#ifdef CONFIG_IOMMU_API
> if (!err && iort_pci_rc_supports_ats(node))
> dev->iommu_fwspec->flags |= IOMMU_FWSPEC_PCI_RC_ATS;
> +#endif
> } else {
> int i = 0;
This was reported, please refer to this patch from Lorenzo:
https://patchwork.kernel.org/patch/10946845/
Thanks
Hanjun
