Re: [PATCH net v3 2/3] net: dsa: mv88e6xxx: flush the ATU when the hash algorithm changes

[Andrew Lunn]

On Wed, Jul 15, 2026 at 09:29:42AM +1000, Luke Howard wrote:
> Changing the ATU hash algorithm invalidates existing entries: those
> loaded under the previous algorithm end up in different bins and read
> back corrupted.
> 
> Flush the ATU whenever the hash algorithm is changed through devlink
> and reload the default broadcast entries. Per-VLAN ATU entries and
> any static addresses are not replayed, so the hash must be selected
> before the FDB or MDB are configured.

Hi Jonas

For v2 you said you thought this was a bit of a foot gun. I suggested
maybe checking all user ports are admin down. What do you think?

      Thanks
	Andrew