diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-12-14 15:18:08 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-12-19 18:00:12 +0100 |
| commit | 9ab91e7c5c514b675470d9b57393cbe455722060 (patch) | |
| tree | 63c42d95b087c7860123380ddfc56ccdece9cf75 | |
| parent | 664204410afb3b0f538d176ad0c2713b04abd4b9 (diff) | |
| download | linux-9ab91e7c5c514b675470d9b57393cbe455722060.tar.bz2 | |
arm64: default to the direct mapping in get_arch_dma_ops
Otherwise the direct mapping won't work at all given that a NULL
dev->dma_ops causes a fallback. Note that we already explicitly set
dev->dma_ops to dma_dummy_ops for dma-incapable devices, so this
fallback should not be needed anyway.
Fixes: 356da6d0cd ("dma-mapping: bypass indirect calls for dma-direct")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
| -rw-r--r-- | arch/arm64/include/asm/dma-mapping.h | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index 273e778f7de2..95dbf3ef735a 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -26,11 +26,7 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) { - /* - * We expect no ISA devices, and all other DMA masters are expected to - * have someone call arch_setup_dma_ops at device creation time. - */ - return &dma_dummy_ops; + return NULL; } void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, |