From 1874619a7df4b14b23b14877e705ae15325773e3 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Wed, 30 May 2018 16:06:24 +0200 Subject: [PATCH] ARM: dma-mapping: Set proper DMA ops in arm_iommu_detach_device() Instead of setting the DMA ops pointer to NULL, set the correct, non-IOMMU ops depending on the device's coherency setting. Signed-off-by: Thierry Reding Reviewed-by: Robin Murphy Acked-by: Russell King Acked-by: Christoph Hellwig Signed-off-by: Ben Skeggs --- arch/arm/mm/dma-mapping.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index be0fa7e..ba0e786 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -1151,6 +1151,11 @@ int arm_dma_supported(struct device *dev, u64 mask) return __dma_supported(dev, mask, false); } +static const struct dma_map_ops *arm_get_dma_map_ops(bool coherent) +{ + return coherent ? &arm_coherent_dma_ops : &arm_dma_ops; +} + #ifdef CONFIG_ARM_DMA_USE_IOMMU static int __dma_info_to_prot(enum dma_data_direction dir, unsigned long attrs) @@ -2296,7 +2301,7 @@ void arm_iommu_detach_device(struct device *dev) iommu_detach_device(mapping->domain, dev); kref_put(&mapping->kref, release_iommu_mapping); to_dma_iommu_mapping(dev) = NULL; - set_dma_ops(dev, NULL); + set_dma_ops(dev, arm_get_dma_map_ops(dev->archdata.dma_coherent)); pr_debug("Detached IOMMU controller from %s device.\n", dev_name(dev)); } @@ -2357,11 +2362,6 @@ static void arm_teardown_iommu_dma_ops(struct device *dev) { } #endif /* CONFIG_ARM_DMA_USE_IOMMU */ -static const struct dma_map_ops *arm_get_dma_map_ops(bool coherent) -{ - return coherent ? &arm_coherent_dma_ops : &arm_dma_ops; -} - void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, const struct iommu_ops *iommu, bool coherent) { -- 2.7.4