linux-kernel - [PATCH 13/23] iommu/amd: Flush iommu tlb in dma_ops_free

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Date:	Tue, 22 Dec 2015 23:21:18 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	iommu@...ts.linux-foundation.org
Cc:	linux-kernel@...r.kernel.org, joro@...tes.org, jroedel@...e.de
Subject: [PATCH 13/23] iommu/amd: Flush iommu tlb in dma_ops_free_addresses

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

Instead of setting need_flush, do the flush directly in
dma_ops_free_addresses.

Signed-off-by: Joerg Roedel <jroedel@...e.de>
---
 drivers/iommu/amd_iommu.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index a26cd76..62a4079 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -1648,8 +1648,10 @@ static void dma_ops_free_addresses(struct dma_ops_domain *dom,
 		return;
 #endif
 
-	if ((address >> APERTURE_RANGE_SHIFT) >= dom->next_index)
-		dom->need_flush = true;
+	if (address + pages > range->next_bit) {
+		domain_flush_tlb(&dom->domain);
+		domain_flush_complete(&dom->domain);
+	}
 
 	address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT;
 
-- 
1.9.1

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