Blackfin arch: fix a compiling warning about dma-mapping

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

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/blackfin/kernel/dma-mapping.c b/arch/blackfin/kernel/dma-mapping.c
index ea48d5b13f11..94d7b119b71e 100644
--- 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) +