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The check to see if dev->dma_mask is NULL in pci-nommu is more appropriate for dma_alloc_coherent(). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>