arm64: Use DMA_ERROR_CODE to denote failed allocation

This patch replaces the static assignment of ~0 to dma_handle with
DMA_ERROR_CODE to be consistent with other platforms.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index d6ceb3d..2c71077 100644 (file)
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -122,7 +122,7 @@ static void *__dma_alloc_noncoherent(struct device *dev, size_t size,
 no_map:
        __dma_free_coherent(dev, size, ptr, *dma_handle, attrs);
 no_mem:
-       *dma_handle = ~0;
+       *dma_handle = DMA_ERROR_CODE;
        return NULL;
 }