From 9fa8af91f0679f2abbebe1382b937264f3a8b981 Mon Sep 17 00:00:00 2001 From: Marek Szyprowski <m.szyprowski@samsung.com> Date: Fri, 27 Jul 2012 17:12:50 +0200 Subject: ARM: dma-mapping: fix error path for memory allocation failure 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> --- arch/arm/mm/dma-mapping.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index a2881c98fb03..cbdeaf4a3392 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -961,7 +961,7 @@ static struct page **__iommu_alloc_buffer(struct device *dev, size_t size, gfp_t return pages; error: - while (--i) + while (i--) if (pages[i]) __free_pages(pages[i], 0); if (array_size <= PAGE_SIZE) -- cgit v1.2.3