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>

1 files changed, 7 insertions, 4 deletions

diff --git a/arch/blackfin/kernel/dma-mapping.c b/arch/blackfin/kernel/dma-mapping.c
index bda57ec8815..ea48d5b13f1 100644
--- a/arch/blackfin/kernel/dma-mapping.c
+++ b/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;
 }