netdev - Re: [patch net-next v3 2/9] vlan: make __vlan_hwaccel_put

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Date:	Wed, 19 Nov 2014 00:05:13 -0800
From:	Pravin Shelar <pshelar@...ira.com>
To:	Jiri Pirko <jiri@...nulli.us>
Cc:	netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	Tom Herbert <therbert@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Willem de Bruijn <willemb@...gle.com>,
	Daniel Borkmann <dborkman@...hat.com>, mst@...hat.com,
	fw@...len.de, Paul.Durrant@...rix.com, Thomas Graf <tgraf@...g.ch>,
	Cong Wang <cwang@...pensource.com>
Subject: Re: [patch net-next v3 2/9] vlan: make __vlan_hwaccel_put_tag return void

On Tue, Nov 18, 2014 at 1:37 PM, Jiri Pirko <jiri@...nulli.us> wrote:
> Always returns the same skb it gets, so change to void.
>
> Signed-off-by: Jiri Pirko <jiri@...nulli.us>

Acked-by: Pravin B Shelar <pshelar@...ira.com>

> ---
>  drivers/scsi/fcoe/fcoe.c | 6 ++----
>  include/linux/if_vlan.h  | 9 ++++-----
>  net/8021q/vlan_dev.c     | 2 +-
>  3 files changed, 7 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
> index 4a8ac7d..73a8cc4 100644
> --- a/drivers/scsi/fcoe/fcoe.c
> +++ b/drivers/scsi/fcoe/fcoe.c
> @@ -1669,10 +1669,8 @@ static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
>             fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
>                 /* must set skb->dev before calling vlan_put_tag */
>                 skb->dev = fcoe->realdev;
> -               skb = __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
> -                                            vlan_dev_vlan_id(fcoe->netdev));
> -               if (!skb)
> -                       return -ENOMEM;
> +               __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
> +                                      vlan_dev_vlan_id(fcoe->netdev));
>         } else
>                 skb->dev = fcoe->netdev;
>
> diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
> index d69f057..1b5dbc2 100644
> --- a/include/linux/if_vlan.h
> +++ b/include/linux/if_vlan.h
> @@ -347,13 +347,11 @@ static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb,
>   *
>   * Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest
>   */
> -static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb,
> -                                                    __be16 vlan_proto,
> -                                                    u16 vlan_tci)
> +static inline void __vlan_hwaccel_put_tag(struct sk_buff *skb,
> +                                         __be16 vlan_proto, u16 vlan_tci)
>  {
>         skb->vlan_proto = vlan_proto;
>         skb->vlan_tci = VLAN_TAG_PRESENT | vlan_tci;
> -       return skb;
>  }
>
>  /**
> @@ -368,7 +366,8 @@ static inline struct sk_buff *vlan_put_tag(struct sk_buff *skb,
>                                            __be16 vlan_proto, u16 vlan_tci)
>  {
>         if (vlan_hw_offload_capable(skb->dev->features, vlan_proto)) {
> -               return __vlan_hwaccel_put_tag(skb, vlan_proto, vlan_tci);
> +               __vlan_hwaccel_put_tag(skb, vlan_proto, vlan_tci);
> +               return skb;
>         } else {
>                 return __vlan_put_tag(skb, vlan_proto, vlan_tci);
>         }
> diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
> index 0d441ec..d6524b2 100644
> --- a/net/8021q/vlan_dev.c
> +++ b/net/8021q/vlan_dev.c
> @@ -150,7 +150,7 @@ static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
>                 u16 vlan_tci;
>                 vlan_tci = vlan->vlan_id;
>                 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
> -               skb = __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
> +               __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
>         }
>
>         skb->dev = vlan->real_dev;
> --
> 1.9.3
>
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