iommu/amd: Wait for completion of IOTLB flush in attach_device

To make sure the domain tlb flush completes before the
function returns, explicitly wait for its completion.

Signed-off-by: Filippo Sironi <sironi@amazon.de>
Fixes: 42a49f965a8d ("amd-iommu: flush domain tlb when attaching a new device")
[joro: Added commit message and fixes tag]
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index fda9923542c90e1377b738ef3209ac33e67509c6..7bdce3b10f3d4003a68a08478c2f25a20301a103 100644 (file)
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2212,6 +2212,8 @@ skip_ats_check:
         */
        domain_flush_tlb_pde(domain);
 
+       domain_flush_complete(domain);
+
        return ret;
 }