[RFC PATCH 01/12] iommu/vt-d: Retire the treatment for revoking PASIDs with pending pgfaults

[Tina Zhang <tina.zhang@intel.com>]

Revoking PASIDs with pending page faults has been achieved by clearing the
pasid entry and draining the pending page faults in both hardware and
software. The temporary treatment can be retired now.

Signed-off-by: Tina Zhang <tina.zhang@intel.com>
---
 drivers/iommu/intel/svm.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 3c531af58658..9bf79cf88aec 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -387,13 +387,6 @@ void intel_svm_remove_dev_pasid(struct device *dev, u32 pasid)
 			if (svm->notifier.ops)
 				mmu_notifier_unregister(&svm->notifier, mm);
 			pasid_private_remove(svm->pasid);
-			/*
-			 * We mandate that no page faults may be outstanding
-			 * for the PASID when intel_svm_unbind_mm() is called.
-			 * If that is not obeyed, subtle errors will happen.
-			 * Let's make them less subtle...
-			 */
-			memset(svm, 0x6b, sizeof(*svm));
 			kfree(svm);
 		}
 	}
-- 
2.39.3