Re: About structure sk_buff

On 06.06.2016 12:59, Corcodel Marian wrote:
> Hi
> Why sk_buff  have memory allocated on hardware drivers on majority nic 
> drivers?
>  This is wrong on rx mode look like:
>
>     struct sk_buff *skb;
>     struct device *d = &tp->pci_dev->dev;
>
>     data = rtl8169_align(data);
>     dma_sync_single_for_cpu(d, addr, pkt_size, DMA_FROM_DEVICE);
>     prefetch(data);
>     skb = netdev_alloc_skb_ip_align(tp->dev, pkt_size);
>     if (skb)
>         memcpy(skb->data, data, pkt_size);
>     dma_sync_single_for_device(d, addr, pkt_size, DMA_FROM_DEVICE);
>
> sk_buff is allocated on place tx mode
> and on start_xmit  no need to keep sk_buff on hardware structure 
> because any info is extracted from
>  next level of driver.
>