commit: 9d1400cf79afb49584b4873eb22cd5130cb341db
From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Date: Tue, 26 Feb 2013 07:46:24 +0100
Subject: 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@xxxxxxxxx>
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: Stable <stable@xxxxxxxxxxxxxxx> [v3.6+]
---
arch/arm/mm/dma-mapping.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index c7e3759..e9db6b4 100644
--- 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;
--
1.7.10.4
--
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