On Fri, Nov 03, 2023 at 01:44:49PM -0300, Jason Gunthorpe wrote:
> Nothing needs this pointer. Return a normal error code with the usual
> IOMMU semantic that ENODEV means 'there is no IOMMU driver'.
>
> Signed-off-by: Jason Gunthorpe <j...@nvidia.com>
> ---
> drivers/acpi/scan.c | 24 +++++++++++++++---------
> 1 file changed, 15 insertions(+), 9 deletions(-)
>
...
> #else /* !CONFIG_IOMMU_API */
> @@ -1623,7 +1624,7 @@ static const struct iommu_ops
> *acpi_iommu_configure_id(struct device *dev,
> int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
> const u32 *input_id)
> {
> - const struct iommu_ops *iommu;
> + int ret;
>
> if (attr == DEV_DMA_NOT_SUPPORTED) {
> set_dma_ops(dev, &dma_dummy_ops);
> @@ -1632,10 +1633,15 @@ int acpi_dma_configure_id(struct device *dev, enum
> dev_dma_attr attr,
>
> acpi_arch_dma_setup(dev);
>
> - iommu = acpi_iommu_configure_id(dev, input_id);
> - if (PTR_ERR(iommu) == -EPROBE_DEFER)
> + ret = acpi_iommu_configure_id(dev, input_id);
> + if (ret == -EPROBE_DEFER)
> return -EPROBE_DEFER;
>
return ret; ?
> + /*
> + * Historically this routine doesn't fail driver probing due to errors
> + * in acpi_iommu_configure()
acpi_iommu_configure_id()
> + */
> +
> arch_setup_dma_ops(dev, 0, U64_MAX, attr == DEV_DMA_COHERENT);
>
> return 0;
> --
> 2.42.0
>
