Fix swiotlb dma_alloc_coherent fallback

Signed-off-by: Andi Kleen <ak@suse.de>

 arch/x86_64/kernel/pci-dma.c |    3 +++
 1 files changed, 3 insertions(+)

Index: linux/arch/x86_64/kernel/pci-dma.c
===================================================================
--- linux.orig/arch/x86_64/kernel/pci-dma.c
+++ linux/arch/x86_64/kernel/pci-dma.c
@@ -107,6 +107,9 @@ dma_alloc_coherent(struct device *dev, s
 				goto again;
 			}
 
+			/* Let low level make its own zone decisions */
+			gfp &= ~(GFP_DMA32|GFP_DMA);
+
 			if (dma_ops->alloc_coherent)
 				return dma_ops->alloc_coherent(dev, size,
 							   dma_handle, gfp);