linux-kernel - Re: [PATCH v7 1/5] net: wan: Add support for QMC HDLC

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Message-ID: <20240314081200.5af62fab@bootlin.com>
Date: Thu, 14 Mar 2024 08:12:00 +0100
From: Herve Codina <herve.codina@...tlin.com>
To: Michael Ellerman <mpe@...erman.id.au>
Cc: Vadim Fedorenko <vadim.fedorenko@...ux.dev>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski
 <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Yury Norov
 <yury.norov@...il.com>, Andy Shevchenko
 <andriy.shevchenko@...ux.intel.com>, Rasmus Villemoes
 <linux@...musvillemoes.dk>, linux-kernel@...r.kernel.org,
 netdev@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, Andrew Lunn
 <andrew@...n.ch>, Mark Brown <broonie@...nel.org>, Ratheesh Kannoth
 <rkannoth@...vell.com>, Christophe Leroy <christophe.leroy@...roup.eu>,
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v7 1/5] net: wan: Add support for QMC HDLC

Hi Michael,

On Thu, 14 Mar 2024 10:05:37 +1100
Michael Ellerman <mpe@...erman.id.au> wrote:

> Hi Herve,
> 
> Herve Codina <herve.codina@...tlin.com> writes:
..
> This breaks when building as a module (eg. ppc32_allmodconfig):
> 
>   In file included from ../include/linux/device/driver.h:21,
>                    from ../include/linux/device.h:32,
>                    from ../include/linux/dma-mapping.h:8,
>                    from ../drivers/net/wan/fsl_qmc_hdlc.c:13:
>   ../drivers/net/wan/fsl_qmc_hdlc.c:405:25: error: ‘qmc_hdlc_driver’ undeclared here (not in a function); did you mean ‘qmc_hdlc_probe’?
>     405 | MODULE_DEVICE_TABLE(of, qmc_hdlc_driver);
>         |                         ^~~~~~~~~~~~~~~
> 
> 
> IIUIC it should be pointing to the table, not the driver, so:
> 
> diff --git a/drivers/net/wan/fsl_qmc_hdlc.c b/drivers/net/wan/fsl_qmc_hdlc.c
> index 5fd7ed325f5b..705c3681fb92 100644
> --- a/drivers/net/wan/fsl_qmc_hdlc.c
> +++ b/drivers/net/wan/fsl_qmc_hdlc.c
> @@ -402,7 +402,7 @@ static const struct of_device_id qmc_hdlc_id_table[] = {
>         { .compatible = "fsl,qmc-hdlc" },
>         {} /* sentinel */
>  };
> -MODULE_DEVICE_TABLE(of, qmc_hdlc_driver);
> +MODULE_DEVICE_TABLE(of, qmc_hdlc_id_table);
> 
>  static struct platform_driver qmc_hdlc_driver = {
>         .driver = {
> 
> 
> Which then builds correctly.

My bad, I missed that one.
I fully agree with your modification.

Do you want me to make a patch (copy/paste of your proposed modification)
or do you plan to send the patch on your side ?

Best regards,
Hervé

-- 
Hervé Codina, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com