iommu/vt-d: Get domain ID before clear pasid entry

LuBaolu · joergroedel · commit 48739afaac2a · 2019-03-01T10:23:36.000+01:00
After tearing down a pasid entry, the domain id is used to invalidate the translation caches. Retrieve the domain id from the pasid entry value before clearing the pasid entry. Otherwise, we will always use domain id 0. Cc: Ashok Raj <ashok.raj@intel.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Liu Yi L <yi.l.liu@intel.com> Fixes: 6f7db75 ("iommu/vt-d: Add second level page table interface") Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/intel-pasid.c b/drivers/iommu/intel-pasid.c
@@ -466,8 +466,8 @@ void intel_pasid_tear_down_entry(struct intel_iommu *iommu,
 	if (WARN_ON(!pte))
 		return;
 
-	intel_pasid_clear_entry(dev, pasid);
 	did = pasid_get_domain_id(pte);
+	intel_pasid_clear_entry(dev, pasid);
 
 	if (!ecap_coherent(iommu->ecap))
 		clflush_cache_range(pte, sizeof(*pte));
