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authorJoerg Roedel <joro@8bytes.org>2013-02-06 12:55:23 +0100
committerJoerg Roedel <joro@8bytes.org>2013-02-07 22:05:49 +0100
commitf528d980c17b8714aedc918ba86e058af914d66b (patch)
treeea899fb1e287775f2cf05735040f772ffca728e6 /drivers/iommu/amd_iommu_init.c
parent88b62b915b0b7e25870eb0604ed9a92ba4bfc9f7 (diff)
downloadop-kernel-dev-f528d980c17b8714aedc918ba86e058af914d66b.zip
op-kernel-dev-f528d980c17b8714aedc918ba86e058af914d66b.tar.gz
iommu/amd: Initialize device table after dma_ops
When dma_ops are initialized the unity mappings are created. The init_device_table_dma() function makes sure DMA from all devices is blocked by default. This opens a short window in time where DMA to unity mapped regions is blocked by the IOMMU. Make sure this does not happen by initializing the device table after dma_ops. Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu/amd_iommu_init.c')
-rw-r--r--drivers/iommu/amd_iommu_init.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index faf10ba..b6ecddb 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1876,11 +1876,6 @@ static int amd_iommu_init_dma(void)
struct amd_iommu *iommu;
int ret;
- init_device_table_dma();
-
- for_each_iommu(iommu)
- iommu_flush_all_caches(iommu);
-
if (iommu_pass_through)
ret = amd_iommu_init_passthrough();
else
@@ -1889,6 +1884,11 @@ static int amd_iommu_init_dma(void)
if (ret)
return ret;
+ init_device_table_dma();
+
+ for_each_iommu(iommu)
+ iommu_flush_all_caches(iommu);
+
amd_iommu_init_api();
amd_iommu_init_notifier();
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