[ARM] Update dma_map_sg()/dma_unmap_sg() API

Update the ARM DMA scatter gather APIs for the scatterlist changes.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 18 insertions, 15 deletions

diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c
index aecc6c3f908..35c72bcf3d0 100644
--- a/arch/arm/common/dmabounce.c
+++ b/arch/arm/common/dmabounce.c
@@ -435,6 +435,7 @@ int
 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
                 enum dma_data_direction dir)
 {
+        struct scatterlist *s;
         int i;
 
         dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
@@ -442,14 +443,13 @@ dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 
         BUG_ON(dir == DMA_NONE);
 
-        for (i = 0; i < nents; i++, sg++) {
-                struct page *page = sg_page(sg);
-                unsigned int offset = sg->offset;
-                unsigned int length = sg->length;
+        for_each_sg(sg, s, nents, i) {
+                struct page *page = sg_page(s);
+                unsigned int offset = s->offset;
+                unsigned int length = s->length;
                 void *ptr = page_address(page) + offset;
 
-                sg->dma_address =
-                        map_single(dev, ptr, length, dir);
+                s->dma_address = map_single(dev, ptr, length, dir);
         }
 
         return nents;
@@ -459,6 +459,7 @@ void
 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
                 enum dma_data_direction dir)
 {
+        struct scatterlist *s;
         int i;
 
         dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
@@ -466,9 +467,9 @@ dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
 
         BUG_ON(dir == DMA_NONE);
 
-        for (i = 0; i < nents; i++, sg++) {
-                dma_addr_t dma_addr = sg->dma_address;
-                unsigned int length = sg->length;
+        for_each_sg(sg, s, nents, i) {
+                dma_addr_t dma_addr = s->dma_address;
+                unsigned int length = s->length;
 
                 unmap_single(dev, dma_addr, length, dir);
         }
@@ -502,6 +503,7 @@ void
 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
                         enum dma_data_direction dir)
 {
+        struct scatterlist *s;
         int i;
 
         dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
@@ -509,9 +511,9 @@ dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
 
         BUG_ON(dir == DMA_NONE);
 
-        for (i = 0; i < nents; i++, sg++) {
-                dma_addr_t dma_addr = sg->dma_address;
-                unsigned int length = sg->length;
+        for_each_sg(sg, s, nents, i) {
+                dma_addr_t dma_addr = s->dma_address;
+                unsigned int length = s->length;
 
                 sync_single(dev, dma_addr, length, dir);
         }
@@ -521,6 +523,7 @@ void
 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
                         enum dma_data_direction dir)
 {
+        struct scatterlist *s;
         int i;
 
         dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
@@ -528,9 +531,9 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
 
         BUG_ON(dir == DMA_NONE);
 
-        for (i = 0; i < nents; i++, sg++) {
-                dma_addr_t dma_addr = sg->dma_address;
-                unsigned int length = sg->length;
+        for_each_sg(sg, s, nents, i) {
+                dma_addr_t dma_addr = s->dma_address;
+                unsigned int length = s->length;
 
                 sync_single(dev, dma_addr, length, dir);
         }