PPC: sg chaining support

This updates the ppc iommu/pci dma mappers to sg chaining. Includes
further fixes from FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/arch/powerpc/kernel/ibmebus.c b/arch/powerpc/kernel/ibmebus.c
index 53bf64623bd8..2e16ca5778a3 100644
--- a/arch/powerpc/kernel/ibmebus.c
+++ b/arch/powerpc/kernel/ibmebus.c
@@ -87,15 +87,16 @@ static void ibmebus_unmap_single(struct device *dev,
 }
 
 static int ibmebus_map_sg(struct device *dev,
-                          struct scatterlist *sg,
+                          struct scatterlist *sgl,
                           int nents, enum dma_data_direction direction)
 {
+        struct scatterlist *sg;
         int i;
 
-        for (i = 0; i < nents; i++) {
-                sg[i].dma_address = (dma_addr_t)page_address(sg[i].page)
-                        + sg[i].offset;
-                sg[i].dma_length = sg[i].length;
+        for_each_sg(sgl, sg, nents, i) {
+                sg->dma_address = (dma_addr_t)page_address(sg->page)
+                        + sg->offset;
+                sg->dma_length = sg->length;
         }
 
         return nents;