<snip>
>
>
>>
>>> + struct sk_buff *skb_new;
>>> +
>>> + skb_new = skb_realloc_headroom(skb, MLXSW_TXHDR_LEN);
>>> + dev_kfree_skb_any(skb);
>>> + if (!skb_new) {
>>> + this_cpu_inc(mlxsw_sx_port->pcpu_stats->tx_dropped);
>>> + return NETDEV_TX_OK;
>>> + }
>>> + skb = skb_new;
>>> + }
>>> + mlxsw_sx_txhdr_construct(skb, &tx_info);
>>> + err = mlxsw_core_skb_transmit(mlxsw_sx, skb, &tx_info);
>>> + if (err == -EAGAIN)
>>> + return NETDEV_TX_BUSY;
>>
>>I think there is a problem here when returning NETDEV_TX_BUSY when
>>original skb might have been freed above in the headroom check. (ref
>>Documentation/networking/driver.txt).
>
>I have to check this out a bit more. Thanks for pointing that out.
You are right. In case queue is busy we obviously cannot free
the original skb. Will fix that in V2. Thanks!
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