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authorDave Jones <davej@redhat.com>2009-03-13 13:37:46 -0700
committerDavid S. Miller <davem@davemloft.net>2009-03-13 13:37:46 -0700
commit59f8e169e25c5fce91826412c38359ecaf940b82 (patch)
tree7c61347ad22e84ee3c1d3c9c42f8e99afb6e9ca5
parent855b0993f216a9b0f9cb33573bd05e314105d86c (diff)
via-velocity: Fix DMA mapping length errors on transmit.
From: Dave Jones <davej@redhat.com> The dma-debug changes caught that this driver uses the wrong DMA mapping length when skb_padto() does something. With suggestions from Eric Dumazet. Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/via-velocity.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/net/via-velocity.c b/drivers/net/via-velocity.c
index c5691fdb7079..fb53ef872df3 100644
--- a/drivers/net/via-velocity.c
+++ b/drivers/net/via-velocity.c
@@ -1838,17 +1838,19 @@ static void velocity_free_tx_buf(struct velocity_info *vptr, struct velocity_td_
{
struct sk_buff *skb = tdinfo->skb;
int i;
+ int pktlen;
/*
* Don't unmap the pre-allocated tx_bufs
*/
if (tdinfo->skb_dma) {
+ pktlen = (skb->len > ETH_ZLEN ? : ETH_ZLEN);
for (i = 0; i < tdinfo->nskb_dma; i++) {
#ifdef VELOCITY_ZERO_COPY_SUPPORT
pci_unmap_single(vptr->pdev, tdinfo->skb_dma[i], le16_to_cpu(td->tdesc1.len), PCI_DMA_TODEVICE);
#else
- pci_unmap_single(vptr->pdev, tdinfo->skb_dma[i], skb->len, PCI_DMA_TODEVICE);
+ pci_unmap_single(vptr->pdev, tdinfo->skb_dma[i], pktlen, PCI_DMA_TODEVICE);
#endif
tdinfo->skb_dma[i] = 0;
}
@@ -2080,17 +2082,14 @@ static int velocity_xmit(struct sk_buff *skb, struct net_device *dev)
struct tx_desc *td_ptr;
struct velocity_td_info *tdinfo;
unsigned long flags;
- int pktlen = skb->len;
+ int pktlen;
__le16 len;
int index;
-
- if (skb->len < ETH_ZLEN) {
- if (skb_padto(skb, ETH_ZLEN))
- goto out;
- pktlen = ETH_ZLEN;
- }
+ if (skb_padto(skb, ETH_ZLEN))
+ goto out;
+ pktlen = max_t(unsigned int, skb->len, ETH_ZLEN);
len = cpu_to_le16(pktlen);