On 2018/9/20 22:50, Haiyang Zhang wrote:
>
>
>> -----Original Message-----
>> From: Stephen Hemminger <step...@networkplumber.org>
>> Sent: Thursday, September 20, 2018 10:44 AM
>> To: YueHaibing <yuehaib...@huawei.com>
>> Cc: da...@davemloft.net; dmitry.tarnya...@lockless.no;
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>> Haiyang Zhang <haiya...@microsoft.com>; wei.l...@citrix.com;
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>> Subject: Re: [PATCH net-next 17/22] hv_netvsc: fix return type of
>> ndo_start_xmit function
>>
>> On Thu, 20 Sep 2018 20:33:01 +0800
>> YueHaibing <yuehaib...@huawei.com> wrote:
>>> int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
>>> */
>>> vf_netdev = rcu_dereference_bh(net_device_ctx->vf_netdev);
>>> if (vf_netdev && netif_running(vf_netdev) &&
>>> - !netpoll_tx_running(net))
>>> - return netvsc_vf_xmit(net, vf_netdev, skb);
>>> + !netpoll_tx_running(net)) {
>>> + ret = netvsc_vf_xmit(net, vf_netdev, skb);
>>> + if (ret)
>>> + return NETDEV_TX_BUSY;
>>> + }
>>
>> Sorry, the new code is wrong. It will fall through if ret == 0 (NETDEV_TX_OK)
>> Please review and test your patches.
>
> Plus consideration of -- For error case, please just return NETDEV_TX_OK. We
> are not sure if the error can go away after retrying, returning
> NETDEV_TX_BUSY
> may cause infinite retry from the upper layer.
>
> So, let's just always return NETDEV_TX_OK like this:
> netvsc_vf_xmit(net, vf_netdev, skb);
> return NETDEV_TX_OK;
Thank you for review.
Will do that in v2.
>
> Thanks,
> - Haiyang
>
> .
>
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