[PATCH net-next v3] net: airoha_eth: increase max MTU to 9220 for DSA jumbo frames

[Andrew Lunn]

On Mon, Jan 19, 2026 at 01:06:58PM +0530, Sayantan Nandy wrote:
> 
> The industry standard jumbo frame MTU is 9216 bytes. When using the DSA
> subsystem, a 4-byte tag is added to each Ethernet frame.
> 
> Increase AIROHA_MAX_MTU to 9220 bytes (9216 + 4) so that users can set a
> standard 9216-byte MTU on DSA ports.
> 
> The underlying hardware supports significantly larger frame sizes
> (approximately 16K). However, the maximum MTU is limited to 9220 bytes
> for now, as this is sufficient to support standard jumbo frames and does
> not incur additional memory allocation overhead.
> 
> 
> Signed-off-by: Sayantan Nandy <sayantann11 at gmail.com>

Reviewed-by: Andrew Lunn <andrew at lunn.ch>

    Andrew