Blackfin arch: fix bug set dma_address properly in dma_map_sg

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

arch/blackfin/kernel/dma-mapping.c

@@ -159,10 +159,13 @@ dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 
 	BUG_ON(direction == DMA_NONE);
 
-	for (i = 0; i < nents; i++)
-		invalidate_dcache_range(sg_dma_address(&sg[i]),
-					sg_dma_address(&sg[i]) +
-					sg_dma_len(&sg[i]));
+	for (i = 0; i < nents; i++, sg++) {
+		sg->dma_address = page_address(sg->page) + sg->offset;
+
+		invalidate_dcache_range(sg_dma_address(sg),
+					sg_dma_address(sg) +
+					sg_dma_len(sg));
+	}
 
 	return nents;
 }