Re: [PATCH 5.15.y] ASoC: cs42l51: fix driver to properly autoload with automatic module loading

[Greg KH <gregkh@linuxfoundation.org>]

On Thu, Jul 27, 2023 at 02:33:39PM +0200, Thomas Petazzoni wrote:
> In commit 2cb1e0259f50 ("ASoC: cs42l51: re-hook of_match_table
> pointer"), 9 years ago, some random guy fixed the cs42l51 after it was
> split into a core part and an I2C part to properly match based on a
> Device Tree compatible string.
> 
> However, the fix in this commit is wrong: the MODULE_DEVICE_TABLE(of,
> ....) is in the core part of the driver, not the I2C part. Therefore,
> automatic module loading based on module.alias, based on matching with
> the DT compatible string, loads the core part of the driver, but not
> the I2C part. And threfore, the i2c_driver is not registered, and the
> codec is not known to the system, nor matched with a DT node with the
> corresponding compatible string.
> 
> In order to fix that, we move the MODULE_DEVICE_TABLE(of, ...) into
> the I2C part of the driver. The cs42l51_of_match[] array is also moved
> as well, as it is not possible to have this definition in one file,
> and the MODULE_DEVICE_TABLE(of, ...) invocation in another file, due
> to how MODULE_DEVICE_TABLE works.
> 
> Thanks to this commit, the I2C part of the driver now properly
> autoloads, and thanks to its dependency on the core part, the core
> part gets autoloaded as well, resulting in a functional sound card
> without having to manually load kernel modules.
> 
> Fixes: 2cb1e0259f50 ("ASoC: cs42l51: re-hook of_match_table pointer")
> Cc: stable@vger.kernel.org
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
> ---
>  sound/soc/codecs/cs42l51-i2c.c | 6 ++++++
>  sound/soc/codecs/cs42l51.c     | 7 -------
>  sound/soc/codecs/cs42l51.h     | 1 -
>  3 files changed, 6 insertions(+), 8 deletions(-)

What is the git commit id of this change in Linus's tree?

thanks,

greg k-h