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dma-mapping: clear dev->dma_ops in arch_teardown_dma_ops 

There is no reason to leave the per-device dma_ops around when
deconfiguring a device, so move this code from arm64 into the
common code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
hifive-unleashed-5.1
Christoph Hellwig 2018-08-24 10:29:02 +02:00
parent dc3c05504d
commit 46053c7368
3 changed files with 4 additions and 11 deletions
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5
arch/arm64/include/asm/dma-mapping.h
View File

@ -39,11 +39,6 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
const struct iommu_ops *iommu, bool coherent);
#define arch_setup_dma_ops arch_setup_dma_ops
#ifdef CONFIG_IOMMU_DMA
void arch_teardown_dma_ops(struct device *dev);
#define arch_teardown_dma_ops arch_teardown_dma_ops
#endif
/* do not use this function in a driver */
static inline bool is_device_dma_coherent(struct device *dev)
{

5
arch/arm64/mm/dma-mapping.c
View File

@ -862,11 +862,6 @@ out_err:
dev_name(dev));
}
void arch_teardown_dma_ops(struct device *dev)
{
dev->dma_ops = NULL;
}
#else
static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,

5
include/linux/dma-mapping.h
View File

@ -664,7 +664,10 @@ static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,
#endif
#ifndef arch_teardown_dma_ops
static inline void arch_teardown_dma_ops(struct device *dev) { }
static inline void arch_teardown_dma_ops(struct device *dev)
{
dev->dma_ops = NULL;
}
#endif
static inline unsigned int dma_get_max_seg_size(struct device *dev)