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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>
This commit is contained in:
Hiroshi Doyu 2012-09-11 07:39:39 +02:00 committed by Marek Szyprowski
parent bdd43cb39f
commit 5a796eeb7b
1 changed files with 5 additions and 4 deletions
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9
arch/arm/mm/dma-mapping.c
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@ -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;