linux-kernel - [PATCH 4.4 14/28] iommu/amd: Finish TLB flush in amd_iommu

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Message-Id: <20171016160924.283890966@linuxfoundation.org>
Date:   Mon, 16 Oct 2017 18:12:07 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Joerg Roedel <jroedel@...e.de>
Subject: [PATCH 4.4 14/28] iommu/amd: Finish TLB flush in amd_iommu_unmap()

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

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

---
 drivers/iommu/amd_iommu.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3096,6 +3096,7 @@ static size_t amd_iommu_unmap(struct iom
 	mutex_unlock(&domain->api_lock);
 
 	domain_flush_tlb_pde(domain);
+	domain_flush_complete(domain);
 
 	return unmap_size;
 }