[PATCH] net: airoha_eth: increase max mtu to 9220 for DSA jumbo frames

[Benjamin Larsson]

On 15/01/2026 18:41, Andrew Lunn wrote:
> On Thu, Jan 15, 2026 at 02:18:37PM +0530, Sayantan Nandy wrote:
>> 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).
> What does the hardware actually support? Is 9220 the real limit? 10K?
> 16K?
>
> 	Andrew
>
Hi, datasheets say 16k and I have observed packet sizes close to that on 
the previous SoC generation EN7523 on the tx path.

MvH

Benjamin Larsson