linux-kernel - [PATCH 3.10 053/139] iommu/amd: Finish TLB flush in amd_iommu

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Date:   Wed,  1 Nov 2017 22:25:54 +0100
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Joerg Roedel <jroedel@...e.de>, Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 053/139] iommu/amd: Finish TLB flush in amd_iommu_unmap()

From: Joerg Roedel <jroedel@...e.de>

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
that.

Fixes: 601367d76bd1 ('x86/amd-iommu: Remove iommu_flush_domain function')
Cc: stable@...r.kernel.org 
Signed-off-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/iommu/amd_iommu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 0e7cd14..88ba964 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3402,6 +3402,7 @@ static size_t amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova,
 	mutex_unlock(&domain->api_lock);
 
 	domain_flush_tlb_pde(domain);
+	domain_flush_complete(domain);
 
 	return unmap_size;
 }
-- 
2.8.0.rc2.1.gbe9624a