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

From: Lu Baolu baolu.lu@linux.intel.com 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.