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Date: Tue, 26 Mar 2013 15:43:26 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Krzysztof Halasa <khc@...waw.pl>, Marek Szyprowski <m.szyprowski@...sung.com> Subject: [ 97/98] ARM: DMA-mapping: add missing GFP_DMA flag for atomic buffer allocation 3.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Marek Szyprowski <m.szyprowski@...sung.com> commit 9d1400cf79afb49584b4873eb22cd5130cb341db upstream. Atomic pool should always be allocated from DMA zone if such zone is available in the system to avoid issues caused by limited dma mask of any of the devices used for making an atomic allocation. Reported-by: Krzysztof Halasa <khc@...waw.pl> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- arch/arm/mm/dma-mapping.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -330,6 +330,7 @@ static int __init atomic_pool_init(void) { struct dma_pool *pool = &atomic_pool; pgprot_t prot = pgprot_dmacoherent(pgprot_kernel); + gfp_t gfp = GFP_KERNEL | GFP_DMA; unsigned long nr_pages = pool->size >> PAGE_SHIFT; unsigned long *bitmap; struct page *page; @@ -348,8 +349,8 @@ static int __init atomic_pool_init(void) if (IS_ENABLED(CONFIG_CMA)) ptr = __alloc_from_contiguous(NULL, pool->size, prot, &page); else - ptr = __alloc_remap_buffer(NULL, pool->size, GFP_KERNEL, prot, - &page, NULL); + ptr = __alloc_remap_buffer(NULL, pool->size, gfp, prot, &page, + NULL); if (ptr) { int i; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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