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>

1 files changed, 3 insertions, 3 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);