diff options
| author | Robin Murphy <robin.murphy@arm.com> | 2016-09-12 17:14:00 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-09-16 09:34:22 +0100 |
| commit | fade1ec055dc6b6373e7487906b7899b41d0c46f (patch) | |
| tree | d8583918947bb5936ecf6e26f8b22598cca7e604 /drivers/gpu/drm/exynos | |
| parent | 44bb7e243bd4b4e5c79de2452cd9762582f58925 (diff) | |
iommu/dma: Avoid PCI host bridge windows
With our DMA ops enabled for PCI devices, we should avoid allocating
IOVAs which a host bridge might misinterpret as peer-to-peer DMA and
lead to faults, corruption or other badness. To be safe, punch out holes
for all of the relevant host bridge's windows when initialising a DMA
domain for a PCI device.
CC: Marek Szyprowski <m.szyprowski@samsung.com>
CC: Inki Dae <inki.dae@samsung.com>
Reported-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/gpu/drm/exynos')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_iommu.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_iommu.h b/drivers/gpu/drm/exynos/exynos_drm_iommu.h index c8de4913fdbe..87f6b5672e11 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_iommu.h +++ b/drivers/gpu/drm/exynos/exynos_drm_iommu.h @@ -66,7 +66,7 @@ static inline int __exynos_iommu_create_mapping(struct exynos_drm_private *priv, if (ret) goto free_domain; - ret = iommu_dma_init_domain(domain, start, size); + ret = iommu_dma_init_domain(domain, start, size, NULL); if (ret) goto put_cookie; |