[ 073/171 ] ARM: DMA-mapping: add missing GFP_DMA flag for atomic bufferallocation

[Steven Rostedt]

3.6.11.2 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>

[ Upstream commit 9d1400cf79afb49584b4873eb22cd5130cb341db ]

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+]
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 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 13f555d..a3658d6 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -311,6 +311,7 @@ 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;
@@ -329,8 +330,8 @@ 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;
 
-- 
1.7.10.4


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