infiniband: sg chaining support

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

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_dma.c b/drivers/infiniband/hw/ipath/ipath_dma.c
index f87f003e3ef8..22709a4f8fc8 100644
--- a/drivers/infiniband/hw/ipath/ipath_dma.c
+++ b/drivers/infiniband/hw/ipath/ipath_dma.c
@@ -30,6 +30,7 @@
  * SOFTWARE.
  */
 
+#include <linux/scatterlist.h>
 #include <rdma/ib_verbs.h>
 
 #include "ipath_verbs.h"
@@ -96,17 +97,18 @@ static void ipath_dma_unmap_page(struct ib_device *dev,
         BUG_ON(!valid_dma_direction(direction));
 }
 
-static int ipath_map_sg(struct ib_device *dev, struct scatterlist *sg, int nents,
-                        enum dma_data_direction direction)
+static int ipath_map_sg(struct ib_device *dev, struct scatterlist *sgl,
+                        int nents, enum dma_data_direction direction)
 {
+        struct scatterlist *sg;
         u64 addr;
         int i;
         int ret = nents;
 
         BUG_ON(!valid_dma_direction(direction));
 
-        for (i = 0; i < nents; i++) {
-                addr = (u64) page_address(sg[i].page);
+        for_each_sg(sgl, sg, nents, i) {
+                addr = (u64) page_address(sg->page);
                 /* TODO: handle highmem pages */
                 if (!addr) {
                         ret = 0;