[PATCH 01/18] ARM/dma-mapping: Drop .dma_supported for IOMMU ops

Robin Murphy
2020-08-20T15:12:05Z

When an IOMMU is present, we trust that it should be capable
of remapping any physical memory, and since the device masks
represent the input (virtual) addresses to the IOMMU it makes
no sense to validate them against physical PFNs anyway.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
arch/arm/mm/dma-mapping.c | 4 ----
1 file changed, 4 deletions(-)

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 8a8949174b1c..ffa387f343dc 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1997,8 +1997,6 @@ static const struct dma_map_ops iommu_ops = {

.map_resource = arm_iommu_map_resource,
.unmap_resource = arm_iommu_unmap_resource,
-
- .dma_supported = arm_dma_supported,
};

static const struct dma_map_ops iommu_coherent_ops = {
@@ -2015,8 +2013,6 @@ static const struct dma_map_ops iommu_coherent_ops = {

.map_resource = arm_iommu_map_resource,
.unmap_resource = arm_iommu_unmap_resource,
-
- .dma_supported = arm_dma_supported,
};

/**
--
2.28.0.dirty