diff options
| author | Olav Haugan <ohaugan@codeaurora.org> | 2017-06-13 22:56:14 +0200 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-06-15 12:40:22 +0200 |
| commit | 577dfe16b852a90f26cf677cdc9113ec34199de6 (patch) | |
| tree | 12c8e916535935d9bf004fb26c66b973374d21fa /arch | |
| parent | arm64: kconfig: allow support for memory failure handling (diff) | |
| download | linux-577dfe16b852a90f26cf677cdc9113ec34199de6.tar.xz linux-577dfe16b852a90f26cf677cdc9113ec34199de6.zip | |
arm64/dma-mapping: Remove extraneous null-pointer checks
The current null-pointer check in __dma_alloc_coherent and
__dma_free_coherent is not needed anymore since the
__dma_alloc/__dma_free functions won't be called if !dev (dummy ops will
be called instead).
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/include/asm/dma-mapping.h | 2 | ||||
| -rw-r--r-- | arch/arm64/mm/dma-mapping.c | 9 |
2 files changed, 0 insertions, 11 deletions
diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index 5392dbeffa45..f72779aad276 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -48,8 +48,6 @@ void arch_teardown_dma_ops(struct device *dev); /* do not use this function in a driver */ static inline bool is_device_dma_coherent(struct device *dev) { - if (!dev) - return false; return dev->archdata.dma_coherent; } diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index 3216e098c058..3e340b625436 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -95,11 +95,6 @@ static void *__dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs) { - if (dev == NULL) { - WARN_ONCE(1, "Use an actual device structure for DMA allocation\n"); - return NULL; - } - if (IS_ENABLED(CONFIG_ZONE_DMA) && dev->coherent_dma_mask <= DMA_BIT_MASK(32)) flags |= GFP_DMA; @@ -128,10 +123,6 @@ static void __dma_free_coherent(struct device *dev, size_t size, bool freed; phys_addr_t paddr = dma_to_phys(dev, dma_handle); - if (dev == NULL) { - WARN_ONCE(1, "Use an actual device structure for DMA allocation\n"); - return; - } freed = dma_release_from_contiguous(dev, phys_to_page(paddr), |