Re: [PATCH net v2] net: ethernet: mtk_eth_soc: initialize PPE per-tag-layer MTU registers

patchwork-bot+netdevbpf
2026-04-12T22:30:32Z

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Fri, 10 Apr 2026 03:57:52 +0100 you wrote:
> The PPE enforces output frame size limits via per-tag-layer VLAN_MTU
> registers that the driver never initializes. The hardware defaults do
> not account for PPPoE overhead, causing the PPE to punt encapsulated
> frames back to the CPU instead of forwarding them.
>
> Initialize the registers at PPE start and on MTU changes using the
> maximum GMAC MTU. This is a conservative approximation -- the actual
> per-PPE requirement depends on egress path, but using the global
> maximum ensures the limits are never too small.
>
> [...]

Here is the summary with links:
- [net,v2] net: ethernet: mtk_eth_soc: initialize PPE per-tag-layer MTU registers
https://git.kernel.org/netdev/net/c/2dddb34dd0d0

You are awesome, thank you!
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