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net: hns: bug fix about ping6 

The current upstreaming code fails to ping other IPv6 net device, because
the enet receives the multicast packets with the src mac addr which is the
same as its mac addr. These packets need to be dropped.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kejian Yan 2016-03-22 16:06:22 +08:00 committed by David S. Miller
parent db219baf19
commit 0d6b425a37
1 changed files with 9 additions and 0 deletions
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9
drivers/net/ethernet/hisilicon/hns/hns_enet.c
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@ -564,6 +564,7 @@ static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
struct sk_buff *skb;
struct hnae_desc *desc;
struct hnae_desc_cb *desc_cb;
struct ethhdr *eh;
unsigned char *va;
int bnum, length, i;
int pull_len;
@ -670,6 +671,14 @@ static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
return -EFAULT;
}
/* filter out multicast pkt with the same src mac as this port */
eh = eth_hdr(skb);
if (unlikely(is_multicast_ether_addr(eh->h_dest) &&
ether_addr_equal(ndev->dev_addr, eh->h_source))) {
dev_kfree_skb_any(skb);
return -EFAULT;
}
ring->stats.rx_pkts++;
ring->stats.rx_bytes += skb->len;