Messages in this thread Patch in this message | | | From | Nicolin Chen <> | Subject | [PATCH 2/4] iommu/dma: Do not init domain if broken_unmanaged_domain | Date | Fri, 27 Jan 2023 12:04:18 -0800 |
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Add a sanity of the broken_unmanaged_domain flag to reject the use of dma-iommu in the early stage, if the flag is set by the iommu driver.
Suggested-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com> --- drivers/iommu/dma-iommu.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index f798c44e0903..f1e8d952b17d 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -545,6 +545,9 @@ static int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base, if (!cookie || cookie->type != IOMMU_DMA_IOVA_COOKIE) return -EINVAL; + if (WARN_ON(!device_iommu_unmanaged_supported(dev))) + return -EINVAL; + iovad = &cookie->iovad; /* Use the smallest supported page size for IOVA granularity */ -- 2.39.1
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