linux-kernel - Re: [PATCH net-next 2/4] net: dsa: b53: Set untag_bridge

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Message-ID: <20201002084035.zrqge6qy43xhce7a@skbuf>
Date:   Fri, 2 Oct 2020 08:40:35 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Florian Fainelli <f.fainelli@...il.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "olteanv@...il.com" <olteanv@...il.com>
Subject: Re: [PATCH net-next 2/4] net: dsa: b53: Set untag_bridge_pvid

On Thu, Oct 01, 2020 at 07:42:13PM -0700, Florian Fainelli wrote:
> Indicate to the DSA receive path that we need to untage the bridge PVID,
> this allows us to remove the dsa_untag_bridge_pvid() calls from
> net/dsa/tag_brcm.c.
> 
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> ---

Reviewed-by: Vladimir Oltean <vladimir.oltean@....com>

>  drivers/net/dsa/b53/b53_common.c |  1 +
>  net/dsa/tag_brcm.c               | 15 ++-------------
>  2 files changed, 3 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
> index 73507cff3bc4..ce18ba0b74eb 100644
> --- a/drivers/net/dsa/b53/b53_common.c
> +++ b/drivers/net/dsa/b53/b53_common.c
> @@ -2603,6 +2603,7 @@ struct b53_device *b53_switch_alloc(struct device *base,
>  	dev->ops = ops;
>  	ds->ops = &b53_switch_ops;
>  	ds->configure_vlan_while_not_filtering = true;
> +	ds->untag_bridge_pvid = true;
>  	dev->vlan_enabled = ds->configure_vlan_while_not_filtering;
>  	mutex_init(&dev->reg_mutex);
>  	mutex_init(&dev->stats_mutex);
> diff --git a/net/dsa/tag_brcm.c b/net/dsa/tag_brcm.c
> index 69d6b8c597a9..ad72dff8d524 100644
> --- a/net/dsa/tag_brcm.c
> +++ b/net/dsa/tag_brcm.c
> @@ -152,11 +152,6 @@ static struct sk_buff *brcm_tag_rcv_ll(struct sk_buff *skb,
>  	/* Remove Broadcom tag and update checksum */
>  	skb_pull_rcsum(skb, BRCM_TAG_LEN);
>  
> -	/* Set the MAC header to where it should point for
> -	 * dsa_untag_bridge_pvid() to parse the correct VLAN header.
> -	 */
> -	skb_set_mac_header(skb, -ETH_HLEN);
> -
>  	skb->offload_fwd_mark = 1;
>  
>  	return skb;
> @@ -187,7 +182,7 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev,
>  		nskb->data - ETH_HLEN - BRCM_TAG_LEN,
>  		2 * ETH_ALEN);
>  
> -	return dsa_untag_bridge_pvid(nskb);
> +	return nskb;
>  }
>  
>  static const struct dsa_device_ops brcm_netdev_ops = {
> @@ -214,14 +209,8 @@ static struct sk_buff *brcm_tag_rcv_prepend(struct sk_buff *skb,
>  					    struct net_device *dev,
>  					    struct packet_type *pt)
>  {
> -	struct sk_buff *nskb;
> -
>  	/* tag is prepended to the packet */
> -	nskb = brcm_tag_rcv_ll(skb, dev, pt, ETH_HLEN);
> -	if (!nskb)
> -		return nskb;
> -
> -	return dsa_untag_bridge_pvid(nskb);
> +	return brcm_tag_rcv_ll(skb, dev, pt, ETH_HLEN);
>  }
>  
>  static const struct dsa_device_ops brcm_prepend_netdev_ops = {
> -- 
> 2.25.1
>