linux-kernel - RE: [PATCH net-next 2/2] net: dsa: lan9303: Learn addresses on CPU port when bridged

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Date:   Tue, 24 Oct 2017 17:18:30 +0000
From:   <Woojung.Huh@...rochip.com>
To:     <privat@...l-hjelmeland.no>, <andrew@...n.ch>,
        <vivien.didelot@...oirfairelinux.com>, <f.fainelli@...il.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH net-next 2/2] net: dsa: lan9303: Learn addresses on CPU
 port when bridged

Hi Egil,

> +static inline int lan9303_tx_use_arl(struct dsa_port *dp, u8 *dest_addr)
> +{
> +	struct lan9303 *chip = dp->ds->priv;
> +
> +	return chip->is_bridged && !ether_addr_equal(dest_addr,
> eth_stp_addr);
> +}
> 
>  static struct sk_buff *lan9303_xmit(struct sk_buff *skb, struct net_device
> *dev)
>  {
> @@ -62,7 +80,10 @@ static struct sk_buff *lan9303_xmit(struct sk_buff *skb,
> struct net_device *dev)
> 
>  	lan9303_tag = (u16 *)(skb->data + 2 * ETH_ALEN);
>  	lan9303_tag[0] = htons(ETH_P_8021Q);
> -	lan9303_tag[1] = htons(dp->index | BIT(4));
> +	lan9303_tag[1] = lan9303_tx_use_arl(dp, skb->data) ?

How about using skb_mac_header(skb) than skb->data?

> +				LAN9303_TAG_TX_USE_ALR :
> +				dp->index |

Thanks.
Woojung