netdev - Re: [RFC net-next v2 4/4] Revert "mt7530 mt7530_fdb_write only set ivl bit vid larger than 1"

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Date:   Mon, 2 Aug 2021 16:44:09 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     DENG Qingfang <dqfext@...il.com>
Cc:     Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Eric Woudstra <ericwouds@...il.com>,
        René van Dorst <opensource@...rst.com>,
        Frank Wunderlich <frank-w@...lic-files.de>
Subject: Re: [RFC net-next v2 4/4] Revert "mt7530 mt7530_fdb_write only set
 ivl bit vid larger than 1"

On Sun, Aug 01, 2021 at 03:10:22AM +0800, DENG Qingfang wrote:
> This reverts commit 7e777021780e9c373fc0c04d40b8407ce8c3b5d5.
> 
> As independent VLAN learning is also used on VID 0 and 1, remove the
> special case.
> 
> Signed-off-by: DENG Qingfang <dqfext@...il.com>
> ---
>  drivers/net/dsa/mt7530.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
> index 38d6ce37d692..d72e04011cc5 100644
> --- a/drivers/net/dsa/mt7530.c
> +++ b/drivers/net/dsa/mt7530.c
> @@ -366,8 +366,7 @@ mt7530_fdb_write(struct mt7530_priv *priv, u16 vid,
>  	int i;
>  
>  	reg[1] |= vid & CVID_MASK;
> -	if (vid > 1)
> -		reg[1] |= ATA2_IVL;
> +	reg[1] |= ATA2_IVL;
>  	reg[2] |= (aging & AGE_TIMER_MASK) << AGE_TIMER;
>  	reg[2] |= (port_mask & PORT_MAP_MASK) << PORT_MAP;
>  	/* STATIC_ENT indicate that entry is static wouldn't
> -- 
> 2.25.1
> 

Would you mind explaining what made VID 1 special in Eric's patch in the
first place?