hexagon: implement the sync_sg_for_device DMA operation

This methods needs to provide the equivalent of sync_single_for_device
for each S/G list element, but was missing.

Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/arch/hexagon/kernel/dma.c b/arch/hexagon/kernel/dma.c
index d2b717f..9e46556 100644 (file)
--- a/arch/hexagon/kernel/dma.c
+++ b/arch/hexagon/kernel/dma.c
@@ -188,6 +188,18 @@ static void hexagon_sync_single_for_device(struct device *dev,
        dma_sync(dma_addr_to_virt(dma_handle), size, dir);
 }
 
+static void hexagon_sync_sg_for_device(struct device *dev,
+               struct scatterlist *sgl, int nents, enum dma_data_direction dir)
+{
+       struct scatterlist *sg;
+       int i;
+
+       for_each_sg(sgl, sg, nents, i)
+               hexagon_sync_single_for_device(dev, sg_dma_address(sg),
+                               sg->length, dir);
+}
+
+
 static int hexagon_mapping_error(struct device *dev, dma_addr_t dma_addr)
 {
        return dma_addr == HEXAGON_MAPPING_ERROR;
@@ -199,6 +211,7 @@ const struct dma_map_ops hexagon_dma_ops = {
        .map_sg         = hexagon_map_sg,
        .map_page       = hexagon_map_page,
        .sync_single_for_device = hexagon_sync_single_for_device,
+       .sync_sg_for_device = hexagon_sync_sg_for_device,
        .mapping_error  = hexagon_mapping_error,
 };