--- 1.4/include/asm-generic/dma-mapping.h	Mon Jan 13 14:37:47 2003
+++ edited/include/asm-generic/dma-mapping.h	Sat Oct 11 15:33:56 2003
@@ -13,20 +13,22 @@
 /* need struct page definitions */
 #include <linux/mm.h>
 
+/* FIXME use this everywhere there's no platform_dma_supported() */
 static inline int
 dma_supported(struct device *dev, u64 mask)
 {
-	BUG_ON(dev->bus != &pci_bus_type);
-
-	return pci_dma_supported(to_pci_dev(dev), mask);
+	/* device can dma, using those address bits */
+	return dev->dma_mask
+		&& (mask & *dev->dma_mask) == mask;
 }
 
 static inline int
-dma_set_mask(struct device *dev, u64 dma_mask)
+dma_set_mask(struct device *dev, u64 mask)
 {
-	BUG_ON(dev->bus != &pci_bus_type);
-
-	return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
+	if (!dma_supported(dev, mask))
+		return 0;
+	*dev->dma_mask = mask;
+	return 1;
 }
 
 static inline void *