2 files changed, 7 insertions, 6 deletions

diff --git a/drivers/net/dl2k.c b/drivers/net/dl2k.c
index 1f3627470c95..1ddefd281213 100644
--- a/drivers/net/dl2k.c
+++ b/drivers/net/dl2k.c
@@ -765,7 +765,7 @@ rio_free_tx (struct net_device *dev, int irq)
                         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);
@@ -893,7 +893,7 @@ receive_packet (struct net_device *dev)
                         /* 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);
@@ -901,7 +901,7 @@ receive_packet (struct net_device *dev)
                         } 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;
@@ -913,7 +913,7 @@ receive_packet (struct net_device *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);
                         }
@@ -1800,7 +1800,7 @@ rio_close (struct net_device *dev)
                 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;
@@ -1810,7 +1810,7 @@ rio_close (struct net_device *dev)
                 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;
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index ff61817082fa..635690cf3e3d 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -14,6 +14,7 @@ enum dma_data_direction {
 };
 
 #define DMA_64BIT_MASK  0xffffffffffffffffULL
+#define DMA_48BIT_MASK  0x0000ffffffffffffULL
 #define DMA_40BIT_MASK  0x000000ffffffffffULL
 #define DMA_39BIT_MASK  0x0000007fffffffffULL
 #define DMA_32BIT_MASK  0x00000000ffffffffULL