From: Filippo Sironi <sironi@amazon.de>
Date: Tue, 10 Sep 2019 17:49:21 +0000 (+0200)
Subject: iommu/amd: Wait for completion of IOTLB flush in attach_device
X-Git-Tag: v4.9.212~70
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a9e0dcfe6b194dc5fd5703da91e0fd383419f234;p=thirdparty%2Fkernel%2Fstable.git

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

[ Upstream commit 0b15e02f0cc4fb34a9160de7ba6db3a4013dc1b7 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index c898c70472bb2..bb0448c91f672 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2113,6 +2113,8 @@ skip_ats_check:
 	 */
 	domain_flush_tlb_pde(domain);
 
+	domain_flush_complete(domain);
+
 	return ret;
 }