ARM: dma-mapping: Small logical clean up

Skip unnecessary operations if order == 0. A little bit easier to
read.

Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 13f555d6249..c390cea6a25 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1012,11 +1012,12 @@ static struct page **__iommu_alloc_buffer(struct device *dev, size_t size, gfp_t
                 if (!pages[i])
                         goto error;
 
-                if (order)
+                if (order) {
                         split_page(pages[i], order);
-                j = 1 << order;
-                while (--j)
-                        pages[i + j] = pages[i] + j;
+                        j = 1 << order;
+                        while (--j)
+                                pages[i + j] = pages[i] + j;
+                }
 
                 __dma_clear_buffer(pages[i], PAGE_SIZE << order);
                 i += 1 << order;