diff options
| author | Dhananjay Phadke <dhananjay@netxen.com> | 2009-01-14 20:50:00 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-01-14 20:50:00 -0800 |
| commit | 6f70340698333f14b1d9c9e913c5de8f66b72c55 (patch) | |
| tree | 52733b9edfee2fcaa396054cbf44555b142e2fd1 /drivers/net/netxen/netxen_nic_main.c | |
| parent | 03e678ee968ae54b79c1580c2935895bd863ad95 (diff) | |
netxen: handle dma mapping failures
o Bail out if pci_map_single() fails while replenishing rx ring.
o Drop packet if pci_map_{single,page}() fail in tx.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/netxen/netxen_nic_main.c')
| -rw-r--r-- | drivers/net/netxen/netxen_nic_main.c | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c index 9268fd2fbac..86867405a36 100644 --- a/drivers/net/netxen/netxen_nic_main.c +++ b/drivers/net/netxen/netxen_nic_main.c @@ -1200,6 +1200,24 @@ static bool netxen_tso_check(struct net_device *netdev, return tso; } +static void +netxen_clean_tx_dma_mapping(struct pci_dev *pdev, + struct netxen_cmd_buffer *pbuf, int last) +{ + int k; + struct netxen_skb_frag *buffrag; + + buffrag = &pbuf->frag_array[0]; + pci_unmap_single(pdev, buffrag->dma, + buffrag->length, PCI_DMA_TODEVICE); + + for (k = 1; k < last; k++) { + buffrag = &pbuf->frag_array[k]; + pci_unmap_page(pdev, buffrag->dma, + buffrag->length, PCI_DMA_TODEVICE); + } +} + static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) { struct netxen_adapter *adapter = netdev_priv(netdev); @@ -1208,6 +1226,8 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) struct netxen_cmd_buffer *pbuf; struct netxen_skb_frag *buffrag; struct cmd_desc_type0 *hwdesc; + struct pci_dev *pdev = adapter->pdev; + dma_addr_t temp_dma; int i, k; u32 producer, consumer; @@ -1240,8 +1260,12 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) pbuf->skb = skb; pbuf->frag_count = frag_count; buffrag = &pbuf->frag_array[0]; - buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len, + temp_dma = pci_map_single(pdev, skb->data, first_seg_len, PCI_DMA_TODEVICE); + if (pci_dma_mapping_error(pdev, temp_dma)) + goto drop_packet; + + buffrag->dma = temp_dma; buffrag->length = first_seg_len; netxen_set_tx_frags_len(hwdesc, frag_count, skb->len); netxen_set_tx_port(hwdesc, adapter->portnum); @@ -1253,7 +1277,6 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) struct skb_frag_struct *frag; int len, temp_len; unsigned long offset; - dma_addr_t temp_dma; /* move to next desc. if there is a need */ if ((i & 0x3) == 0) { @@ -1269,8 +1292,12 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) offset = frag->page_offset; temp_len = len; - temp_dma = pci_map_page(adapter->pdev, frag->page, offset, + temp_dma = pci_map_page(pdev, frag->page, offset, len, PCI_DMA_TODEVICE); + if (pci_dma_mapping_error(pdev, temp_dma)) { + netxen_clean_tx_dma_mapping(pdev, pbuf, i); + goto drop_packet; + } buffrag++; buffrag->dma = temp_dma; @@ -1345,6 +1372,11 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) netdev->trans_start = jiffies; return NETDEV_TX_OK; + +drop_packet: + adapter->stats.txdropped++; + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; } static int netxen_nic_check_temp(struct netxen_adapter *adapter) |