[PATCH 05/14] x86/amd_gart: look at coherent_dma_mask instead of GFP_DMA

[Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>]

We want to phase out looking at the magic GFP_DMA flag in the dma mapping
routines, so switch the gart driver to use the coherent_dma_mask instead,
which is used to select the GFP_DMA flag in the caller.

Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
---
 arch/x86/kernel/amd_gart_64.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/amd_gart_64.c b/arch/x86/kernel/amd_gart_64.c
index 52e3abcf3e70..79ac6caaaabb 100644
--- a/arch/x86/kernel/amd_gart_64.c
+++ b/arch/x86/kernel/amd_gart_64.c
@@ -484,7 +484,7 @@ gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr,
 	unsigned long align_mask;
 	struct page *page;
 
-	if (force_iommu && !(flag & GFP_DMA)) {
+	if (force_iommu && dev->coherent_dma_mask > DMA_BIT_MASK(24)) {
 		flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
 		page = alloc_pages(flag | __GFP_ZERO, get_order(size));
 		if (!page)
-- 
2.14.2