Blackfin arch: fix a compiling warning about dma-mapping

Signed-off-by: Bryan Wu <bryan.wu@analog.com>

diff --git a/arch/blackfin/kernel/dma-mapping.c b/arch/blackfin/kernel/dma-mapping.c
index ea48d5b..94d7b11 100644 (file)
--- a/arch/blackfin/kernel/dma-mapping.c
+++ b/arch/blackfin/kernel/dma-mapping.c
@@ -160,7 +160,8 @@ dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
        BUG_ON(direction == DMA_NONE);
 
        for (i = 0; i < nents; i++, sg++) {
-               sg->dma_address = page_address(sg->page) + sg->offset;
+               sg->dma_address = (dma_addr_t)(page_address(sg->page) +
+                                       sg->offset);
 
                invalidate_dcache_range(sg_dma_address(sg),
                                        sg_dma_address(sg) +