break;
                skb = np->tx_skbuff[entry];
                pci_unmap_single (np->pdev,
-                                 np->tx_ring[entry].fraginfo & 0xffffffffffff,
+                                 np->tx_ring[entry].fraginfo & DMA_48BIT_MASK,
                                  skb->len, PCI_DMA_TODEVICE);
                if (irq)
                        dev_kfree_skb_irq (skb);
                        /* Small skbuffs for short packets */
                        if (pkt_len > copy_thresh) {
                                pci_unmap_single (np->pdev,
-                                                 desc->fraginfo & 0xffffffffffff,
+                                                 desc->fraginfo & DMA_48BIT_MASK,
                                                  np->rx_buf_sz,
                                                  PCI_DMA_FROMDEVICE);
                                skb_put (skb = np->rx_skbuff[entry], pkt_len);
                        } else if ((skb = dev_alloc_skb (pkt_len + 2)) != NULL) {
                                pci_dma_sync_single_for_cpu(np->pdev,
                                                            desc->fraginfo & 
-                                                               0xffffffffffff,
+                                                               DMA_48BIT_MASK,
                                                            np->rx_buf_sz,
                                                            PCI_DMA_FROMDEVICE);
                                skb->dev = dev;
                                skb_put (skb, pkt_len);
                                pci_dma_sync_single_for_device(np->pdev,
                                                               desc->fraginfo &
-                                                                0xffffffffffff,
+                                                                DMA_48BIT_MASK,
                                                               np->rx_buf_sz,
                                                               PCI_DMA_FROMDEVICE);
                        }
                skb = np->rx_skbuff[i];
                if (skb) {
                        pci_unmap_single(np->pdev, 
-                                        np->rx_ring[i].fraginfo & 0xffffffffffff,
+                                        np->rx_ring[i].fraginfo & DMA_48BIT_MASK,
                                         skb->len, PCI_DMA_FROMDEVICE);
                        dev_kfree_skb (skb);
                        np->rx_skbuff[i] = NULL;
                skb = np->tx_skbuff[i];
                if (skb) {
                        pci_unmap_single(np->pdev, 
-                                        np->tx_ring[i].fraginfo & 0xffffffffffff,
+                                        np->tx_ring[i].fraginfo & DMA_48BIT_MASK,
                                         skb->len, PCI_DMA_TODEVICE);
                        dev_kfree_skb (skb);
                        np->tx_skbuff[i] = NULL;