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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2010-03-31 22:13:05 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-04-01 18:38:32 -0700 |
| commit | 07e7de8f7a7146b3ac77c52ebd91c93a8370d9a8 (patch) | |
| tree | f8236d971e13a2afd5178137ba778deb4b8989a7 /drivers/net/acenic.c | |
| parent | 6c57990696a16ae43ea9fddb131b2784292068ba (diff) | |
| download | lwn-07e7de8f7a7146b3ac77c52ebd91c93a8370d9a8.tar.gz lwn-07e7de8f7a7146b3ac77c52ebd91c93a8370d9a8.zip | |
acenic: fix the misusage of zero dma address
acenic wrongly assumes that zero is an invalid dma address (calls
dma_unmap_page for only non zero dma addresses). Zero is a valid dma
address on some architectures. The dma length can be used here.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/acenic.c')
| -rw-r--r-- | drivers/net/acenic.c | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/drivers/net/acenic.c b/drivers/net/acenic.c index 4ae750ef1e10..e52cc3b71693 100644 --- a/drivers/net/acenic.c +++ b/drivers/net/acenic.c @@ -2077,18 +2077,16 @@ static inline void ace_tx_int(struct net_device *dev, do { struct sk_buff *skb; - dma_addr_t mapping; struct tx_ring_info *info; info = ap->skb->tx_skbuff + idx; skb = info->skb; - mapping = pci_unmap_addr(info, mapping); - if (mapping) { - pci_unmap_page(ap->pdev, mapping, + if (dma_unmap_len(info, maplen)) { + pci_unmap_page(ap->pdev, dma_unmap_addr(info, mapping), pci_unmap_len(info, maplen), PCI_DMA_TODEVICE); - pci_unmap_addr_set(info, mapping, 0); + dma_unmap_len_set(info, maplen, 0); } if (skb) { @@ -2376,14 +2374,12 @@ static int ace_close(struct net_device *dev) for (i = 0; i < ACE_TX_RING_ENTRIES(ap); i++) { struct sk_buff *skb; - dma_addr_t mapping; struct tx_ring_info *info; info = ap->skb->tx_skbuff + i; skb = info->skb; - mapping = pci_unmap_addr(info, mapping); - if (mapping) { + if (dma_unmap_len(info, maplen)) { if (ACE_IS_TIGON_I(ap)) { /* NB: TIGON_1 is special, tx_ring is in io space */ struct tx_desc __iomem *tx; @@ -2394,10 +2390,10 @@ static int ace_close(struct net_device *dev) } else memset(ap->tx_ring + i, 0, sizeof(struct tx_desc)); - pci_unmap_page(ap->pdev, mapping, + pci_unmap_page(ap->pdev, dma_unmap_addr(info, mapping), pci_unmap_len(info, maplen), PCI_DMA_TODEVICE); - pci_unmap_addr_set(info, mapping, 0); + dma_unmap_len_set(info, maplen, 0); } if (skb) { dev_kfree_skb(skb); |