netdev - Re: [can-next v3] can: Kconfig: select CAN driver infrastructure by default

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Message-ID: <20251129-ultraviolet-sponge-of-focus-e788eb-mkl@pengutronix.de>
Date: Sat, 29 Nov 2025 13:51:59 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Oliver Hartkopp <socketcan@...tkopp.net>
Cc: linux-can@...r.kernel.org, netdev@...r.kernel.org, davem@...emloft.net, 
	kuba@...nel.org, kernel@...gutronix.de, Vincent Mailhol <mailhol@...nel.org>, 
	kernel test robot <lkp@...el.com>
Subject: Re: [can-next v3] can: Kconfig: select CAN driver infrastructure by
 default

On 29.11.2025 10:05:00, Oliver Hartkopp wrote:
> The CAN bus support enabled with CONFIG_CAN provides a socket-based
> access to CAN interfaces. With the introduction of the latest CAN protocol
> CAN XL additional configuration status information needs to be exposed to
> the network layer than formerly provided by standard Linux network drivers.
>
> This requires the CAN driver infrastructure to be selected by default.
> As the CAN network layer can only operate on CAN interfaces anyway all
> distributions and common default configs enable at least one CAN driver.
>
> So selecting CONFIG_CAN_DEV when CONFIG_CAN is selected by the user has
> no effect on established configurations but solves potential build issues
> when CONFIG_CAN[_XXX]=y is set together with CANFIG_CAN_DEV=m
>
> Fixes: 1a620a723853 ("can: raw: instantly reject unsupported CAN frames")
> Reported-by: Vincent Mailhol <mailhol@...nel.org>
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202511282325.uVQFRTkA-lkp@intel.com/
> Suggested-by: Marc Kleine-Budde <mkl@...gutronix.de>
> Signed-off-by: Oliver Hartkopp <socketcan@...tkopp.net>

Added to linux-can-next and included in my latest PR.

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde          |
Embedded Linux                   | https://www.pengutronix.de |
Vertretung Nürnberg              | Phone: +49-5121-206917-129 |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-9   |

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