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net: hns: fix bug that alloc skb fail lead to port unavailable

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When hns_nic_poll_rx_skb alloc skb fail, it will break receive cycle and
read new fbd_num to start new receive cycle. It recomputes cycle num is
fbd_num minus clean_count, actually this cycle num is too big because
it drop out receive cycle. It brings about the port unavailable.

So we will goto out when alloc skb fail to fix this bug.

Signed-off-by: Jun He <hjat2005@huawei.com>
Signed-off-by: Ding Tianhong <dingtianhong@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:
Jun He 2016-06-21 11:56:36 +08:00 committed by David S. Miller
parent d8a8371e8b
commit 3a31b64e3e
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ethernet/hisilicon/hns/hns_enet.c
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@ -768,10 +768,10 @@ recv:
clean_count = 0;
}
/* poll one pkg*/
/* poll one pkt*/
err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
if (unlikely(!skb)) /* this fault cannot be repaired */
break;
goto out;
recv_bds += bnum;
clean_count += bnum;
@ -797,6 +797,7 @@ recv:
}
}
out:
/* make all data has been write before submit */
if (clean_count > 0)
hns_nic_alloc_rx_buffers(ring_data, clean_count);