diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2012-02-29 17:45:28 +0400 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2012-05-21 17:06:12 +0400 |
| commit | 553ac78877242b6d8b591323731df304140d0f99 (patch) | |
| tree | fe826ee0134b8a97df9350648f85a94edd06f042 /arch | |
| parent | 6b6f770b573903f8a7d1cfab1fc662685653f413 (diff) | |
| download | linux-553ac78877242b6d8b591323731df304140d0f99.tar.xz | |
ARM: dma-mapping: introduce DMA_ERROR_CODE constant
Replace all uses of ~0 with DMA_ERROR_CODE, what should make the code
easier to read.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-By: Subash Patel <subash.ramaswamy@linaro.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/common/dmabounce.c | 6 | ||||
| -rw-r--r-- | arch/arm/include/asm/dma-mapping.h | 4 | ||||
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 2 |
3 files changed, 7 insertions, 5 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index 595ecd290ebf..210ad1bef7e5 100644 --- a/arch/arm/common/dmabounce.c +++ b/arch/arm/common/dmabounce.c @@ -254,7 +254,7 @@ static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size, if (buf == NULL) { dev_err(dev, "%s: unable to map unsafe buffer %p!\n", __func__, ptr); - return ~0; + return DMA_ERROR_CODE; } dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n", @@ -320,7 +320,7 @@ dma_addr_t __dma_map_page(struct device *dev, struct page *page, ret = needs_bounce(dev, dma_addr, size); if (ret < 0) - return ~0; + return DMA_ERROR_CODE; if (ret == 0) { __dma_page_cpu_to_dev(page, offset, size, dir); @@ -329,7 +329,7 @@ dma_addr_t __dma_map_page(struct device *dev, struct page *page, if (PageHighMem(page)) { dev_err(dev, "DMA buffer bouncing of HIGHMEM pages is not supported\n"); - return ~0; + return DMA_ERROR_CODE; } return map_single(dev, page_address(page) + offset, size, dir); diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index cb3b7c981c4b..6a838da03c5b 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -10,6 +10,8 @@ #include <asm-generic/dma-coherent.h> #include <asm/memory.h> +#define DMA_ERROR_CODE (~0) + #ifdef __arch_page_to_dma #error Please update to __arch_pfn_to_dma #endif @@ -123,7 +125,7 @@ extern int dma_set_mask(struct device *, u64); */ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) { - return dma_addr == ~0; + return dma_addr == DMA_ERROR_CODE; } /* diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 322c70a0190b..e4ac5fc86b0a 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -342,7 +342,7 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, */ gfp &= ~(__GFP_COMP); - *handle = ~0; + *handle = DMA_ERROR_CODE; size = PAGE_ALIGN(size); page = __dma_alloc_buffer(dev, size, gfp); |