| From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.19 560/671] iommu/amd: Wait for completion of IOTLB flush in attach_device | Date | Thu, 16 Jan 2020 12:03:18 -0500 |
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From: Filippo Sironi <sironi@amazon.de>
[ 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> --- 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 9991386fb700..bea19aa33758 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2153,6 +2153,8 @@ static int attach_device(struct device *dev, */ domain_flush_tlb_pde(domain); + domain_flush_complete(domain); + return ret; } -- 2.20.1
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