Re: [PATCH v2] iio: am2315: Remove ACPI support

[Jonathan Cameron <jic23@kernel.org>]

On Tue, 4 May 2021 18:41:02 +0300
Andy Shevchenko <andy.shevchenko@gmail.com> wrote:

> On Tue, May 4, 2021 at 6:37 PM Guenter Roeck <linux@roeck-us.net> wrote:
> >
> > With CONFIG_ACPI=n and -Werror, 0-day reports:
> >
> > drivers/iio/humidity/am2315.c:259:36: error:
> >         'am2315_acpi_id' defined but not used
> >
> > According to Andy Shevchenko, the ACPI ID used in this driver is fake
> > and does not really exist. Remove it and with it ACPI support from
> > the driver.  
> 
> As I have found zarro evidences, I agree with removal. We must not
> create fake ACPI IDs on our owns. If anybody will find a device that
> is using this broken ID for real, then we may add it back.
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

Applied to the togreg branch of iio.git with the commit message changed to
reflect PRP0001 still working with this gone.

Thanks,

Jonathan
> 
> > Reported-by: kernel test robot <lkp@intel.com>
> > Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
> > Signed-off-by: Guenter Roeck <linux@roeck-us.net>
> > ---
> > v2: Instead of making am2315_acpi_id depend on CONFIG_ACPI,
> >     remove ACPI support entirely.
> >
> >  drivers/iio/humidity/am2315.c | 9 ---------
> >  1 file changed, 9 deletions(-)
> >
> > diff --git a/drivers/iio/humidity/am2315.c b/drivers/iio/humidity/am2315.c
> > index 23bc9c784ef4..8d7ec2f5acf8 100644
> > --- a/drivers/iio/humidity/am2315.c
> > +++ b/drivers/iio/humidity/am2315.c
> > @@ -7,7 +7,6 @@
> >   * 7-bit I2C address: 0x5C.
> >   */
> >
> > -#include <linux/acpi.h>
> >  #include <linux/delay.h>
> >  #include <linux/i2c.h>
> >  #include <linux/kernel.h>
> > @@ -256,17 +255,9 @@ static const struct i2c_device_id am2315_i2c_id[] = {
> >  };
> >  MODULE_DEVICE_TABLE(i2c, am2315_i2c_id);
> >
> > -static const struct acpi_device_id am2315_acpi_id[] = {
> > -       {"AOS2315", 0},
> > -       {}
> > -};
> > -
> > -MODULE_DEVICE_TABLE(acpi, am2315_acpi_id);
> > -
> >  static struct i2c_driver am2315_driver = {
> >         .driver = {
> >                 .name = "am2315",
> > -               .acpi_match_table = ACPI_PTR(am2315_acpi_id),
> >         },
> >         .probe =            am2315_probe,
> >         .id_table =         am2315_i2c_id,
> > --
> > 2.25.1
> >  
> 
>