From: Hiroshi Doyu <hdoyu@nvidia.com>
Date: Tue, 11 Sep 2012 05:39:39 +0000 (+0200)
Subject: ARM: dma-mapping: Small logical clean up
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=5a796eeb7bbacc628044b12a2d000167ddbabec8;p=openwrt%2Fstaging%2Fblogic.git

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>
---

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 13f555d62491..c390cea6a258 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;