netdev - Re: [PATCH net-next] net: replace last open coded skb_orphan

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Date:	Mon, 8 Jun 2015 17:54:31 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Willem de Bruijn <willemb@...gle.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH net-next] net: replace last open coded skb_orphan_frags
 with function call

On Mon, Jun 08, 2015 at 11:53:08AM -0400, Willem de Bruijn wrote:
> From: Willem de Bruijn <willemb@...gle.com>
> 
> Commit 70008aa50e92 ("skbuff: convert to skb_orphan_frags") replaced
> open coded tests of SKBTX_DEV_ZEROCOPY and skb_copy_ubufs with calls
> to helper function skb_orphan_frags. Apply that to the last remaining
> open coded site.
> 
> Signed-off-by: Willem de Bruijn <willemb@...gle.com>

Acked-by: Michael S. Tsirkin <mst@...hat.com>

> ---
>  net/core/dev.c | 11 ++---------
>  1 file changed, 2 insertions(+), 9 deletions(-)
> 
> diff --git a/net/core/dev.c b/net/core/dev.c
> index 0602e91..6778a99 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -1723,15 +1723,8 @@ EXPORT_SYMBOL_GPL(is_skb_forwardable);
>  
>  int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb)
>  {
> -	if (skb_shinfo(skb)->tx_flags & SKBTX_DEV_ZEROCOPY) {
> -		if (skb_copy_ubufs(skb, GFP_ATOMIC)) {
> -			atomic_long_inc(&dev->rx_dropped);
> -			kfree_skb(skb);
> -			return NET_RX_DROP;
> -		}
> -	}
> -
> -	if (unlikely(!is_skb_forwardable(dev, skb))) {
> +	if (skb_orphan_frags(skb, GFP_ATOMIC) ||
> +	    unlikely(!is_skb_forwardable(dev, skb))) {
>  		atomic_long_inc(&dev->rx_dropped);
>  		kfree_skb(skb);
>  		return NET_RX_DROP;
> -- 
> 2.2.0.rc0.207.ga3a616c
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