From: Lorenzo Bianconi <lorenzo@kernel.org>
To: Sayantan Nandy <sayantann11@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, netdev@vger.kernel.org,
sayantan.nandy@airoha.com, bread.hsu@airoha.com,
kuldeep.malik@airoha.com, aniket.negi@airoha.com
Subject: Re: [PATCH] net: airoha_eth: increase max MTU to 9220 for DSA jumbo frame support the industry standard for jumbo frame MTU is 9216 bytes. When using DSA sub-system, an extra 4 byte tag is added to each frame. To allow users to set the standard 9216-byte MTU via ifconfig ,increase AIROHA_MAX_MTU to 9220 bytes (9216+4).
Date: Thu, 15 Jan 2026 08:57:01 +0100 [thread overview]
Message-ID: <aWidzQgGXpbht9zL@lore-desk> (raw)
In-Reply-To: <20260115064043.45589-1-sayantann11@gmail.com>
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> This change ensures compatibility with common network equipment and jumbo frame configurations.
can you please provide more details?
Regards,
Lorenzo
>
> Signed-off-by: Sayantan Nandy <sayantann11@gmail.com>
> ---
> drivers/net/ethernet/airoha/airoha_eth.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/airoha/airoha_eth.h b/drivers/net/ethernet/airoha/airoha_eth.h
> index fbbc58133364..20e602d61e61 100644
> --- a/drivers/net/ethernet/airoha/airoha_eth.h
> +++ b/drivers/net/ethernet/airoha/airoha_eth.h
> @@ -21,7 +21,7 @@
> #define AIROHA_MAX_NUM_IRQ_BANKS 4
> #define AIROHA_MAX_DSA_PORTS 7
> #define AIROHA_MAX_NUM_RSTS 3
> -#define AIROHA_MAX_MTU 9216
> +#define AIROHA_MAX_MTU 9220
> #define AIROHA_MAX_PACKET_SIZE 2048
> #define AIROHA_NUM_QOS_CHANNELS 4
> #define AIROHA_NUM_QOS_QUEUES 8
> --
> 2.43.0
>
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next prev parent reply other threads:[~2026-01-15 7:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-15 6:40 [PATCH] net: airoha_eth: increase max MTU to 9220 for DSA jumbo frame support the industry standard for jumbo frame MTU is 9216 bytes. When using DSA sub-system, an extra 4 byte tag is added to each frame. To allow users to set the standard 9216-byte MTU via ifconfig ,increase AIROHA_MAX_MTU to 9220 bytes (9216+4) Sayantan Nandy
2026-01-15 7:57 ` Lorenzo Bianconi [this message]
2026-01-20 10:08 ` Paolo Abeni
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