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iommu/amd: Initialize device table after dma_ops

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commit f528d980c1 upstream.

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.

Signed-off-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Joerg Roedel
2013-02-06 12:55:23 +01:00
committed by Greg Kroah-Hartman
parent d90dc15e97
commit 9b2eee352d
1 changed files with 5 additions and 5 deletions
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10
drivers/iommu/amd_iommu_init.c
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@@ -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();