ARM: dma-mapping: fix GFP_ATOMIC macro usage

commit 10c8562f932d89c030083e15f9279971ed637136 upstream.

GFP_ATOMIC is not a single gfp flag, but a macro which expands to the other
flags and LACK of __GFP_WAIT flag. To check if caller wanted to perform an
atomic allocation, the code must test __GFP_WAIT flag presence. This patch
fixes the issue introduced in v3.6-rc5

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index ef3e0f3..6c9d705 100644 (file)
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1311,7 +1311,7 @@ static void *arm_iommu_alloc_attrs(struct device *dev, size_t size,
        *handle = DMA_ERROR_CODE;
        size = PAGE_ALIGN(size);
 
-       if (gfp & GFP_ATOMIC)
+       if (!(gfp & __GFP_WAIT))
                return __iommu_alloc_atomic(dev, size, handle);
 
        pages = __iommu_alloc_buffer(dev, size, gfp, attrs);