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Date:   Wed, 21 Jul 2021 20:55:57 -0700
From:   Florian Fainelli <>
To:     Lino Sanfilippo <>,,
Subject: Re: [PATCH v2 2/2] net: dsa: tag_ksz: dont let the hardware process
 the layer 4 checksum

On 7/21/2021 2:56 PM, Lino Sanfilippo wrote:
> If the checksum calculation is offloaded to the network device (e.g due to
> NETIF_F_HW_CSUM inherited from the DSA master device), the calculated
> layer 4 checksum is incorrect. This is since the DSA tag which is placed
> after the layer 4 data is considered as being part of the daa and thus
> errorneously included into the checksum calculation.
> To avoid this, always calculate the layer 4 checksum in software.
> Signed-off-by: Lino Sanfilippo <>

Reviewed-by: Florian Fainelli <>

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