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ARM: DMA-mapping: add missing GFP_DMA flag for atomic buffer allocation 

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@pm.waw.pl>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Stable <stable@vger.kernel.org>	[v3.6+]
This commit is contained in:
Marek Szyprowski 2013-02-26 07:46:24 +01:00
parent 6dbe51c251
commit 9d1400cf79
1 changed files with 3 additions and 2 deletions
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5
arch/arm/mm/dma-mapping.c
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@ -342,6 +342,7 @@ 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;
@ -361,8 +362,8 @@ static int __init atomic_pool_init(void)
ptr = __alloc_from_contiguous(NULL, pool->size, prot, &page,
atomic_pool_init);
else
ptr = __alloc_remap_buffer(NULL, pool->size, GFP_KERNEL, prot,
&page, atomic_pool_init);
ptr = __alloc_remap_buffer(NULL, pool->size, gfp, prot, &page,
atomic_pool_init);
if (ptr) {
int i;