diff options
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index c27447653903..f9941cd689e9 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -1135,13 +1135,28 @@ static struct page **__iommu_alloc_buffer(struct device *dev, size_t size, gfp |= __GFP_NOWARN | __GFP_HIGHMEM; while (count) { - int j, order = __fls(count); + int j, order; + + for (order = __fls(count); order > 0; --order) { + /* + * We do not want OOM killer to be invoked as long + * as we can fall back to single pages, so we force + * __GFP_NORETRY for orders higher than zero. + */ + pages[i] = alloc_pages(gfp | __GFP_NORETRY, order); + if (pages[i]) + break; + } - pages[i] = alloc_pages(gfp, order); - while (!pages[i] && order) - pages[i] = alloc_pages(gfp, --order); - if (!pages[i]) - goto error; + if (!pages[i]) { + /* + * Fall back to single page allocation. + * Might invoke OOM killer as last resort. + */ + pages[i] = alloc_pages(gfp, 0); + if (!pages[i]) + goto error; + } if (order) { split_page(pages[i], order); |