[PATCH 3.2 55/94] iommu/amd: Finish TLB flush in amd_iommu_unmap()

From: Ben Hutchings
Date: Thu Dec 28 2017 - 13:21:24 EST

3.2.97-rc1 review patch. If anyone has any objections, please let me know.


From: Joerg Roedel <jroedel@xxxxxxx>

commit ce76353f169a6471542d999baf3d29b121dce9c0 upstream.

The function only sends the flush command to the IOMMU(s),
but does not wait for its completion when it returns. Fix

Fixes: 601367d76bd1 ('x86/amd-iommu: Remove iommu_flush_domain function')
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
drivers/iommu/amd_iommu.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2772,6 +2772,7 @@ static int amd_iommu_unmap(struct iommu_

+ domain_flush_complete(domain);

return get_order(unmap_size);