diff options
| author | Ben Greear <greearb@candelatech.com> | 2012-02-11 15:40:11 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2012-02-24 01:53:39 -0800 |
| commit | b0d1562c820ae0f9ffe4d21f43676f1466ccaec2 (patch) | |
| tree | 233c799db3d2e0febc3ca0dd668e2875bdfb8230 | |
| parent | 11a78dcf35fc20bd6ae57fee11ca0447a62d33a8 (diff) | |
e1000: Support RX-FCS flag.
This allows the NIC to pass the Ethernet Frame Checksum
(FCS) up the stack. Useful when sniffing packets.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| -rw-r--r-- | drivers/net/ethernet/intel/e1000/e1000_main.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c index bd1d28f4cc9..8aa8097558f 100644 --- a/drivers/net/ethernet/intel/e1000/e1000_main.c +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c @@ -1071,6 +1071,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev, netdev->features |= netdev->hw_features; netdev->hw_features |= NETIF_F_RXCSUM; + netdev->hw_features |= NETIF_F_RXFCS; if (pci_using_dac) { netdev->features |= NETIF_F_HIGHDMA; @@ -4137,10 +4138,9 @@ static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, ((u32)(rx_desc->errors) << 24), le16_to_cpu(rx_desc->csum), skb); - pskb_trim(skb, skb->len - 4); - - /* probably a little skewed due to removing CRC */ - total_rx_bytes += skb->len; + total_rx_bytes += (skb->len - 4); /* don't count FCS */ + if (likely(!(netdev->features & NETIF_F_RXFCS))) + pskb_trim(skb, skb->len - 4); total_rx_packets++; /* eth type trans needs skb->data to point to something */ @@ -4294,14 +4294,15 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, } } - /* adjust length to remove Ethernet CRC, this must be - * done after the TBI_ACCEPT workaround above */ - length -= 4; - - /* probably a little skewed due to removing CRC */ - total_rx_bytes += length; + total_rx_bytes += (length - 4); /* don't count FCS */ total_rx_packets++; + if (likely(!(netdev->features & NETIF_F_RXFCS))) + /* adjust length to remove Ethernet CRC, this must be + * done after the TBI_ACCEPT workaround above + */ + length -= 4; + e1000_check_copybreak(netdev, buffer_info, length, &skb); skb_put(skb, length); |