[PATCH] fs_enet: Fix dma_unmap_single calls

The following patches fixes a bug with erroneous calling of
dma_unmap_single. It never triggered because on normal ppc32
the calls is a NOP. Out of tree drivers need this fix however.

Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 12 insertions, 9 deletions

diff --git a/drivers/net/fs_enet/fs_enet-main.c b/drivers/net/fs_enet/fs_enet-main.c
index 44fac7373289..9342d5bc7bb4 100644
--- a/drivers/net/fs_enet/fs_enet-main.c
+++ b/drivers/net/fs_enet/fs_enet-main.c
@@ -130,7 +130,7 @@ static int fs_enet_rx_napi(struct net_device *dev, int *budget)
 
                         skb = fep->rx_skbuff[curidx];
 
-                        dma_unmap_single(fep->dev, skb->data,
+                        dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
                                 DMA_FROM_DEVICE);
 
@@ -144,7 +144,7 @@ static int fs_enet_rx_napi(struct net_device *dev, int *budget)
 
                         skb = fep->rx_skbuff[curidx];
 
-                        dma_unmap_single(fep->dev, skb->data,
+                        dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
                                 DMA_FROM_DEVICE);
 
@@ -268,7 +268,7 @@ static int fs_enet_rx_non_napi(struct net_device *dev)
 
                         skb = fep->rx_skbuff[curidx];
 
-                        dma_unmap_single(fep->dev, skb->data,
+                        dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
                                 DMA_FROM_DEVICE);
 
@@ -278,7 +278,7 @@ static int fs_enet_rx_non_napi(struct net_device *dev)
 
                         skb = fep->rx_skbuff[curidx];
 
-                        dma_unmap_single(fep->dev, skb->data,
+                        dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
                                 DMA_FROM_DEVICE);
 
@@ -399,7 +399,8 @@ static void fs_enet_tx(struct net_device *dev)
                         fep->stats.collisions++;
 
                 /* unmap */
-                dma_unmap_single(fep->dev, skb->data, skb->len, DMA_TO_DEVICE);
+                dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
+                                skb->len, DMA_TO_DEVICE);
 
                 /*
                  * Free the sk buffer associated with this last transmit. 
@@ -547,17 +548,19 @@ void fs_cleanup_bds(struct net_device *dev)
 {
         struct fs_enet_private *fep = netdev_priv(dev);
         struct sk_buff *skb;
+        cbd_t *bdp;
         int i;
 
         /*
          * Reset SKB transmit buffers.  
          */
-        for (i = 0; i < fep->tx_ring; i++) {
+        for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
                 if ((skb = fep->tx_skbuff[i]) == NULL)
                         continue;
 
                 /* unmap */
-                dma_unmap_single(fep->dev, skb->data, skb->len, DMA_TO_DEVICE);
+                dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
+                                skb->len, DMA_TO_DEVICE);
 
                 fep->tx_skbuff[i] = NULL;
                 dev_kfree_skb(skb);
@@ -566,12 +569,12 @@ void fs_cleanup_bds(struct net_device *dev)
         /*
          * Reset SKB receive buffers 
          */
-        for (i = 0; i < fep->rx_ring; i++) {
+        for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
                 if ((skb = fep->rx_skbuff[i]) == NULL)
                         continue;
 
                 /* unmap */
-                dma_unmap_single(fep->dev, skb->data,
+                dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
                         L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
                         DMA_FROM_DEVICE);