RE: [PATCH v2 3/8] iommu/vt-d: Implement device_pasid domain attach ops

[Tian, Kevin]

> From: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
> Sent: Tuesday, March 15, 2022 1:07 PM
> +static int intel_iommu_attach_dev_pasid(struct iommu_domain *domain,
> +					struct device *dev, ioasid_t pasid)
> +{
> +	struct dmar_domain *dmar_domain = to_dmar_domain(domain);
> +	struct device_domain_info *info = get_domain_info(dev);
> +	struct intel_iommu *iommu = info->iommu;
> +	struct pasid_info *pinfo;
> +	unsigned long flags;
> +	int ret = 0;
> +	void *entry;
> +
> +	if (!info)
> +		return -ENODEV;

btw this interface only works in scalable mode. Lack of a check to
return error on legacy mode here.

Thanks
Kevin