Re: [patch net-next-2.6] bonding: remove skb_share_check in handle_frame

[Andy Gospodarek <andy@greyhouse.net>]

On Tue, Mar 01, 2011 at 10:29:07AM +0100, Jiri Pirko wrote:
> Unapplicable, sorry (wrong branch :(). Here's corrected patch:
> 
> Subject: [PATCH net-next-2.6 v2] bonding: remove skb_share_check in handle_frame
> 
> No need to do share check here.
> 
> Signed-off-by: Jiri Pirko <jpirko@redhat.com>
> ---
>  drivers/net/bonding/bond_main.c |    3 ---
>  1 files changed, 0 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
> index 584f97b..367ea60 100644
> --- a/drivers/net/bonding/bond_main.c
> +++ b/drivers/net/bonding/bond_main.c
> @@ -1498,9 +1498,6 @@ static struct sk_buff *bond_handle_frame(struct sk_buff *skb)
>  	struct net_device *slave_dev;
>  	struct net_device *bond_dev;
>  
> -	skb = skb_share_check(skb, GFP_ATOMIC);
> -	if (unlikely(!skb))
> -		return NULL;
>  	slave_dev = skb->dev;
>  	bond_dev = ACCESS_ONCE(slave_dev->master);
>  	if (unlikely(!bond_dev))
> -- 
> 1.7.3.4
> 

Why did you decide to get rid of it here rather than the 3 places in the
bonding driver where it is currently needed?  I think this can cover
those cases since bond_handle_frame will be called after the ptype_all
handlers before any of the ptype handlers.