From: Joerg Roedel <jroedel@suse.de>
Date: Fri, 13 Oct 2017 12:32:37 +0000 (+0200)
Subject: iommu/amd: Finish TLB flush in amd_iommu_unmap()
X-Git-Tag: v4.14-rc5~15^2
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=ce76353f169a6471542d999baf3d29b121dce9c0;p=uclinux-h8%2Flinux.git

iommu/amd: Finish TLB flush in amd_iommu_unmap()

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@vger.kernel.org # >= 2.6.33
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 822679ac90a1..8e8874d23717 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3048,6 +3048,7 @@ 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;
 }