diff mbox series

[2/4] iommu/dma: Do not init domain if broken_unmanaged_domain

Message ID 451e7beb57ec6de66ee0da5b38886105436f53d7.1674849118.git.nicolinc@nvidia.com
State New
Headers show
Series iommu: Reject drivers with broken_unmanaged_domain | expand

Commit Message

Nicolin Chen Jan. 27, 2023, 8:04 p.m. UTC 
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 mbox series

Patch

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 */