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: v4.13.8~38
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d8c1d3cb188e555ff18a70fe1940e883bb12b535;p=thirdparty%2Fkernel%2Fstable.git

iommu/amd: Finish TLB flush in amd_iommu_unmap()

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')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 354cbd6392cdf..6326439391474 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3262,6 +3262,7 @@ 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;
 }