netdev - Re: [PATCH net-next] net: dsa: mt7530: drop paranoid checks in .get_tag

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Message-Id: <20210731025424.639902-1-dqfext@gmail.com>
Date:   Sat, 31 Jul 2021 10:54:23 +0800
From:   DENG Qingfang <dqfext@...il.com>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>
Subject: Re: [PATCH net-next] net: dsa: mt7530: drop paranoid checks in .get_tag_protocol()

On Sat, Jul 31, 2021 at 01:57:14AM +0300, Vladimir Oltean wrote:
> It is desirable to reduce the surface of DSA_TAG_PROTO_NONE as much as
> we can, because we now have options for switches without hardware
> support for DSA tagging, and the occurrence in the mt7530 driver is in
> fact quite gratuitout and easy to remove. Since ds->ops->get_tag_protocol()
> is only called for CPU ports, the checks for a CPU port in
> mtk_get_tag_protocol() are redundant and can be removed.
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
> ---
>  drivers/net/dsa/mt7530.c | 10 +---------
>  1 file changed, 1 insertion(+), 9 deletions(-)
> 
> diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
> index 69f21b71614c..b6e0b347947e 100644
> --- a/drivers/net/dsa/mt7530.c
> +++ b/drivers/net/dsa/mt7530.c
> @@ -1717,15 +1717,7 @@ static enum dsa_tag_protocol
>  mtk_get_tag_protocol(struct dsa_switch *ds, int port,
>  		     enum dsa_tag_protocol mp)
>  {
> -	struct mt7530_priv *priv = ds->priv;
> -
> -	if (port != MT7530_CPU_PORT) {
> -		dev_warn(priv->dev,
> -			 "port not matched with tagging CPU port\n");
> -		return DSA_TAG_PROTO_NONE;
> -	} else {
> -		return DSA_TAG_PROTO_MTK;
> -	}
> +	return DSA_TAG_PROTO_MTK;
>  }
>  
>  #ifdef CONFIG_GPIOLIB
> -- 
> 2.25.1
> 

Acked-by: DENG Qingfang <dqfext@...il.com>