RE: [PATCH 1/1] iommu/vt-d: Fix RID2PASID setup failure

[Tian, Kevin]

> From: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Sent: Monday, June 20, 2022 4:17 PM
> @@ -2564,7 +2564,7 @@ static int domain_add_dev_info(struct
> dmar_domain *domain, struct device *dev)
>  			ret = intel_pasid_setup_second_level(iommu,
> domain,
>  					dev, PASID_RID2PASID);
>  		spin_unlock_irqrestore(&iommu->lock, flags);
> -		if (ret) {
> +		if (ret && ret != -EBUSY) {
>  			dev_err(dev, "Setup RID2PASID failed\n");
>  			dmar_remove_one_dev_info(dev);
>  			return ret;
> --
> 2.25.1

It's cleaner to avoid this error at the first place, i.e. only do the
setup when the first device is attached to the pasid table.