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ARM: dma-mapping: fix error path for memory allocation failure

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This patch fixes incorrect check in error path. When the allocation of
first page fails, the kernel ops appears due to accessing -1 element of
the pages array.

Reported-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
This commit is contained in:
Marek Szyprowski 2012-07-27 17:12:50 +02:00
parent 50262a4bf3
commit 9fa8af91f0
1 changed files with 1 additions and 1 deletions
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2
arch/arm/mm/dma-mapping.c
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@ -961,7 +961,7 @@ static struct page **__iommu_alloc_buffer(struct device *dev, size_t size, gfp_t
return pages; return pages;
error: error:
while (--i) while (i--)
if (pages[i]) if (pages[i])
__free_pages(pages[i], 0); __free_pages(pages[i], 0);
if (array_size <= PAGE_SIZE) if (array_size <= PAGE_SIZE)