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| author | kirjanov@gmail.com <kirjanov@gmail.com> | 2010-02-24 08:41:18 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-26 02:08:47 -0800 |
| commit | e382c3018ad19744d3c5d281daf4b0e9f052af66 (patch) | |
| tree | 3753477e8559874b2791a97d0fa008ab1098d55d | |
| parent | dee7399c2d9a1d3b0af5d68d7e0dd922e104a2a8 (diff) | |
| download | op-kernel-dev-e382c3018ad19744d3c5d281daf4b0e9f052af66.zip op-kernel-dev-e382c3018ad19744d3c5d281daf4b0e9f052af66.tar.gz | |
sis190: handle DMA mapping errors
Signed-off-by: Denis Kirjanov <kirjanov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/sis190.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/drivers/net/sis190.c b/drivers/net/sis190.c index 4487b06..80af4a4 100644 --- a/drivers/net/sis190.c +++ b/drivers/net/sis190.c @@ -484,18 +484,24 @@ static struct sk_buff *sis190_alloc_rx_skb(struct sis190_private *tp, { u32 rx_buf_sz = tp->rx_buf_sz; struct sk_buff *skb; + dma_addr_t mapping; skb = netdev_alloc_skb(tp->dev, rx_buf_sz); - if (likely(skb)) { - dma_addr_t mapping; - - mapping = pci_map_single(tp->pci_dev, skb->data, tp->rx_buf_sz, - PCI_DMA_FROMDEVICE); - sis190_map_to_asic(desc, mapping, rx_buf_sz); - } else - sis190_make_unusable_by_asic(desc); + if (unlikely(!skb)) + goto skb_alloc_failed; + mapping = pci_map_single(tp->pci_dev, skb->data, tp->rx_buf_sz, + PCI_DMA_FROMDEVICE); + if (pci_dma_mapping_error(tp->pci_dev, mapping)) + goto out; + sis190_map_to_asic(desc, mapping, rx_buf_sz); return skb; + +out: + dev_kfree_skb_any(skb); +skb_alloc_failed: + sis190_make_unusable_by_asic(desc); + return NULL; } static u32 sis190_rx_fill(struct sis190_private *tp, struct net_device *dev, @@ -1184,6 +1190,11 @@ static netdev_tx_t sis190_start_xmit(struct sk_buff *skb, } mapping = pci_map_single(tp->pci_dev, skb->data, len, PCI_DMA_TODEVICE); + if (pci_dma_mapping_error(tp->pci_dev, mapping)) { + netif_err(tp, tx_err, dev, + "PCI mapping failed, dropping packet"); + return NETDEV_TX_BUSY; + } tp->Tx_skbuff[entry] = skb; |
