linux-kernel - Re: [PATCH] iio: accel: fxls8962af: fix i2c dependency

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAHp75VeWSfBek+m6hQoc6G7wP+JNN-V3S0kfcGBESZLR+6QAxg@mail.gmail.com>
Date:   Wed, 21 Jul 2021 18:50:59 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Sean Nyekjaer <sean@...nix.com>, Arnd Bergmann <arnd@...db.de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Stephan Gerhold <stephan@...hold.net>,
        Hans de Goede <hdegoede@...hat.com>,
        Tomas Melin <tomas.melin@...sala.com>,
        Mike Looijmans <mike.looijmans@...ic.nl>,
        Alexandru Ardelean <aardelean@...iqon.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: accel: fxls8962af: fix i2c dependency

On Wed, Jul 21, 2021 at 6:13 PM Arnd Bergmann <arnd@...nel.org> wrote:
>
> From: Arnd Bergmann <arnd@...db.de>
>
> With CONFIG_SPI=y and CONFIG_I2C=m, building fxls8962af into vmlinux
> causes a link error against the I2C module:
>
> aarch64-linux-ld: drivers/iio/accel/fxls8962af-core.o: in function `fxls8962af_fifo_flush':
> fxls8962af-core.c:(.text+0x3a0): undefined reference to `i2c_verify_client'
>
> Work around it by adding a Kconfig dependency that forces the SPI driver
> to be a loadable module whenever I2C is a module.

...

>  config FXLS8962AF
>         tristate
> +       depends on I2C || !I2C # cannot be built-in for modular I2C

Can you enlighten me how this will not be a no-op?

-- 
With Best Regards,
Andy Shevchenko