RE: [PATCH net] net: renesas: rswitch: fix forwarding offload statemachine

Hello Nikita,

-----Original Message-----
From: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Sent: Thursday, February 5, 2026 2:57 PM
To: Michael Dege <redacted>; Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>;
Andrew Lunn [off-list ref]; David S. Miller [off-list ref]; Eric Dumazet
[off-list ref]; Jakub Kicinski [off-list ref]; Paolo Abeni [off-list ref]
Cc: netdev@vger.kernel.org; linux-renesas-soc@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: Re: [PATCH net] net: renesas: rswitch: fix forwarding offload statemachine

quoted

quoted

Quite strange, is anything else logged?  E.g. some messages from linux bridge layer?

Nikita

Here is the log from the version without "if else"

[   83.107759] renesas_eth_sw e6880000.ethernet tsn0: Link is Down
[   83.108734] br0: port 1(tsn0) entered disabled state
[   83.109669] renesas_eth_sw e6880000.ethernet tsn0: stopping hw learning
[   83.110519] renesas_eth_sw e6880000.ethernet tsn0: stopping hw forwarding
[   83.111405] renesas_eth_sw e6880000.ethernet tsn1: stopping hw forwarding

The driver was originally designed to enable hardware forwarding when not less than two ports are in
forwarding state. When only one port has hw forwarding, there is no destination to forward.

Nikita

The current driver allows Linux to use the bridge port as local port to the bridge. The offloading 
Also supports switching traffic to Linux through the bridge port. Therefore, the offloading shouldn't 
Be dropped if only one external port is up on the bridge.

Best regards,

Michael