Re: [PATCH v2 5/6] hwmon: (lm70) Avoid undefined reference to match table

[Rob Herring <robh@kernel.org>]

On Fri, Jan 22, 2021 at 9:44 PM Stephen Boyd <swboyd@chromium.org> wrote:
>
> We're going to remove of_match_ptr() from the definition of
> of_match_device() when CONFIG_OF=n. This way we can always be certain
> that of_match_device() acts the same when CONFIG_OF is set and when it
> isn't. Add of_match_ptr() here so that this doesn't break when that
> change is made to the of_match_device() API.
>
> Signed-off-by: Stephen Boyd <swboyd@chromium.org>
> Acked-by: Guenter Roeck <linux@roeck-us.net>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Geert Uytterhoeven <geert@linux-m68k.org>
> Cc: Jean Delvare <jdelvare@suse.com>
> Cc: Guenter Roeck <linux@roeck-us.net>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Frank Rowand <frowand.list@gmail.com>
> Cc: <linux-hwmon@vger.kernel.org>
> ---
>
> Please ack so Rob can apply.
>
>  drivers/hwmon/lm70.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/hwmon/lm70.c b/drivers/hwmon/lm70.c
> index ae2b84263a44..e3153ae80634 100644
> --- a/drivers/hwmon/lm70.c
> +++ b/drivers/hwmon/lm70.c
> @@ -178,7 +178,7 @@ static int lm70_probe(struct spi_device *spi)
>         struct lm70 *p_lm70;
>         int chip;
>
> -       of_match = of_match_device(lm70_of_ids, &spi->dev);
> +       of_match = of_match_device(of_match_ptr(lm70_of_ids), &spi->dev);
>         if (of_match)
>                 chip = (int)(uintptr_t)of_match->data;

Why can't this do:

if (spi->dev.of_node)
    chip = (int)(uintptr_t)of_device_get_match_data();
else {

>         else {
> --
> https://chromeos.dev
>