netdev - Re: [PATCH net-next v3 5/6] net: dsa: qca: ar9331: add bridge support

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Message-ID: <20210809050402.o6l2uu75sslol3la@pengutronix.de>
Date:   Mon, 9 Aug 2021 07:04:02 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     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>,
        Russell King <linux@...linux.org.uk>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org
Subject: Re: [PATCH net-next v3 5/6] net: dsa: qca: ar9331: add bridge support

On Sun, Aug 08, 2021 at 02:08:29AM +0300, Vladimir Oltean wrote:
> Hi Oleksij,
> 
> On Mon, Aug 02, 2021 at 03:10:36PM +0200, Oleksij Rempel wrote:
> > This switch is providing forwarding matrix, with it we can configure
> > individual bridges. Potentially we can configure more than one not VLAN
> > based bridge on this HW.
> > 
> > Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> > Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
> > ---
> 
> I don't see anywhere in this patch or in this series that the
> tag_ar9331.c file is being patched to set skb->offload_fwd_mark to true
> for packets sent (flooded) to the CPU that have already been forwarded
> by the hardware switch. If the software bridge sees a broadcast packet
> coming from your driver and it has offload_fwd_mark = false, it will
> forward it a second time and the other nodes in your network will see
> duplicates.

Ok, thank you, I'll take a look on it.

Regards,
Oleksij
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