linux-kernel - Re: [net-next v23 2/7] net: mtip: The L2 switch driver for imx287

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Message-ID: <20260205182805.196fd832@kernel.org>
Date: Thu, 5 Feb 2026 18:28:05 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Lukasz Majewski <lukasz.majewski@...lbox.org>
Cc: Andrew Lunn <andrew+netdev@...n.ch>, davem@...emloft.net, Eric Dumazet
 <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Rob Herring
 <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer
 <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, Richard Cochran
 <richardcochran@...il.com>, netdev@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, Stefan Wahren
 <wahrenst@....net>, Simon Horman <horms@...nel.org>, Andrew Lunn
 <andrew@...n.ch>
Subject: Re: [net-next v23 2/7] net: mtip: The L2 switch driver for imx287

On Thu,  5 Feb 2026 00:21:30 +0100 Lukasz Majewski wrote:
> This patch series provides support for More Than IP L2 switch embedded
> in the imx287 SoC.
> 
> This is a two port switch (placed between uDMA[01] and MAC-NET[01]),
> which can be used for offloading the network traffic.
> 
> It can be used interchangeably with current FEC driver - to be more
> specific: one can use either of it, depending on the requirements.
> 
> The biggest difference is the usage of DMA - when FEC is used, separate
> DMAs are available for each ENET-MAC block.
> However, with switch enabled - only the DMA0 is used to send/receive data
> to/form switch (and then switch sends them to respecitive ports).
> 
> Signed-off-by: Lukasz Majewski <lukasz.majewski@...lbox.org>
> Reviewed-by: Stefan Wahren <wahrenst@....net>
> Reviewed-by: Andrew Lunn <andrew@...n.ch>

Transient build failure here:

drivers/net/ethernet/freescale/mtipsw/mtipl2sw.c:1072:32: warning: variable ‘priv’ set but not used [-Wunused-but-set-variable]
 1072 |         struct mtip_ndev_priv *priv;
      |                                ^~~~

I sent out the AI code reviews while at it, without looking at them.
So please approach them with caution..