From f528d980c17b8714aedc918ba86e058af914d66b Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Wed, 6 Feb 2013 12:55:23 +0100 Subject: [PATCH] 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 --- drivers/iommu/amd_iommu_init.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index faf10ba1ed9..b6ecddb63cd 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(); -- 2.43.2