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+]

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index c7e3759f16d303c8c989af0a903f768f358c0e4f..e9db6b4bf65a158adf54bd4a799dbc7fee754c36 100644 (file)
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -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;