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8139too: Support RX-FCS flag.

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This allows the NIC to pass the Ethernet FCS on up
the stack, and is useful when sniffing networks.

Signed-off-by: Ben Greear <greearb@candelatech.com>
This commit is contained in:
Ben Greear 2012-02-10 15:04:32 +00:00 committed by Jeff Kirsher
parent d95089dc54
commit eeb69aa443
1 changed files with 5 additions and 1 deletions
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6
drivers/net/ethernet/realtek/8139too.c
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@ -1023,6 +1023,7 @@ static int __devinit rtl8139_init_one (struct pci_dev *pdev,
dev->vlan_features = dev->features;
dev->hw_features |= NETIF_F_RXALL;
dev->hw_features |= NETIF_F_RXFCS;
dev->irq = pdev->irq;
@ -1970,7 +1971,10 @@ static int rtl8139_rx(struct net_device *dev, struct rtl8139_private *tp,
/* read size+status of next frame from DMA ring buffer */
rx_status = le32_to_cpu (*(__le32 *) (rx_ring + ring_offset));
rx_size = rx_status >> 16;
pkt_size = rx_size - 4;
if (likely(!(dev->features & NETIF_F_RXFCS)))
pkt_size = rx_size - 4;
else
pkt_size = rx_size;
netif_dbg(tp, rx_status, dev, "%s() status %04x, size %04x, cur %04x\n",
__func__, rx_status, rx_size, cur_rx);