[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).

[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]

This change ensures compatibility with common network equipment and jumbo frame configurations.

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

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).

[Lorenzo Bianconi]

[-- Attachment #1: Type: text/plain, Size: 916 bytes --]

> 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
> 

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

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).

[Paolo Abeni]

On 1/15/26 7:40 AM, Sayantan Nandy wrote:
> This change ensures compatibility with common network equipment and jumbo frame configurations.

It looks like that a significant amount of the description landed in the
subject, which is not good.

Please reformat the changelog carefully.

Also it looks like this is intended to address a bug; if so it should
target the 'net' tree and include a Fixes tag.

Thanks,

Paolo