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Diffstat (limited to 'arch/arm/mm/dma-mapping.c')
-rw-r--r--arch/arm/mm/dma-mapping.c23
1 files changed, 0 insertions, 23 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index ceb56928d01e..4055f2dc2859 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -104,25 +104,6 @@ static struct arm_dma_buffer *arm_dma_buffer_find(void *virt)
*
*/
-#ifdef CONFIG_ARM_DMA_USE_IOMMU
-/*
- * Return whether the given device DMA address mask can be supported
- * properly. For example, if your device can only drive the low 24-bits
- * during bus mastering, then you would pass 0x00ffffff as the mask
- * to this function.
- */
-static int arm_dma_supported(struct device *dev, u64 mask)
-{
- unsigned long max_dma_pfn = min(max_pfn - 1, arm_dma_pfn_limit);
-
- /*
- * Translate the device's DMA mask to a PFN limit. This
- * PFN number includes the page which we can DMA to.
- */
- return PHYS_PFN(dma_to_phys(dev, mask)) >= max_dma_pfn;
-}
-#endif
-
static void __dma_clear_buffer(struct page *page, size_t size, int coherent_flag)
{
/*
@@ -1681,8 +1662,6 @@ 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 = {
@@ -1699,8 +1678,6 @@ 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,
};
/**