netdev - Re: [PATCH net 1/2] net: dsa: tag_sja1105: fix MAC DA patching from meta frames

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Date: Sun, 2 Jul 2023 16:37:37 +0200
From: Florian Fainelli <f.fainelli@...il.com>
To: Vladimir Oltean <vladimir.oltean@....com>, netdev@...r.kernel.org
Cc: Andrew Lunn <andrew@...n.ch>, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net 1/2] net: dsa: tag_sja1105: fix MAC DA patching from
 meta frames

On 6/29/2023 4:14 PM, Vladimir Oltean wrote:
> The SJA1105 manual says that at offset 4 into the meta frame payload we
> have "MAC destination byte 2" and at offset 5 we have "MAC destination
> byte 1". These are counted from the LSB, so byte 1 is h_dest[ETH_HLEN-2]
> aka h_dest[4] and byte 2 is h_dest[ETH_HLEN-3] aka h_dest[3].
> 
> The sja1105_meta_unpack() function decodes these the other way around,
> so a frame with MAC DA 01:80:c2:11:22:33 is received by the network
> stack as having 01:80:c2:22:11:33.
> 
> Fixes: e53e18a6fe4d ("net: dsa: sja1105: Receive and decode meta frames")
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>

Reviewed-by: Florian Fainelli <florian.fainelli@...adcom.com>
-- 
Florian