From: Filippo Sironi <sironi@amazon.de>
Date: Tue, 10 Sep 2019 19:49:21 +0200
Subject: iommu/amd: Wait for completion of IOTLB flush in attach_device
Git-commit: 0b15e02f0cc4fb34a9160de7ba6db3a4013dc1b7
Patch-mainline: v5.4-rc1
References: bsc#1154611

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>
---
 drivers/iommu/amd_iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index fda9923542c9..7bdce3b10f3d 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2212,6 +2212,8 @@ static int attach_device(struct device *dev,
 	 */
 	domain_flush_tlb_pde(domain);
 
+	domain_flush_complete(domain);
+
 	return ret;
 }