On Thu, 23 Feb 2023 09:41:29 +0100
Hans de Goede <hdegoede@xxxxxxxxxx> wrote:
> Hi,
>
> On 2/23/23 03:00, Kai-Heng Feng wrote:
> > If a second dummy client that talks to the actual I2C address was
> > created in probe(), there should be a proper cleanup on driver and
> > device removal to avoid leakage.
> >
> > So unregister the dummy client via another callback.
> >
> > Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> > Suggested-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> > Fixes: c1e62062ff54 ("iio: light: cm32181: Handle CM3218 ACPI devices with 2 I2C resources")
> > Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2152281
> > Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
>
> Thanks this patch looks good to me now, and you
> already added my Reviewed-by, so from my POV this
> is ready for merging now.
>
Applied to the fixes-togreg branch of iio.git and marked for stable inclusion.
Thanks,
Jonathan
> Regards,
>
> Hans
>
> > ---
> > v4:
> > - Remove logging kmalloc failures.
> >
> > v3:
> > - Use devm_add_action_or_reset() in a correct place.
> > - Wording.
> >
> > v2:
> > - Use devm_add_action_or_reset() instead of remove() callback to avoid
> > race.
> >
> > drivers/iio/light/cm32181.c | 12 ++++++++++++
> > 1 file changed, 12 insertions(+)
> >
> > diff --git a/drivers/iio/light/cm32181.c b/drivers/iio/light/cm32181.c
> > index b1674a5bfa368..d4a34a3bf00d9 100644
> > --- a/drivers/iio/light/cm32181.c
> > +++ b/drivers/iio/light/cm32181.c
> > @@ -429,6 +429,14 @@ static const struct iio_info cm32181_info = {
> > .attrs = &cm32181_attribute_group,
> > };
> >
> > +static void cm32181_unregister_dummy_client(void *data)
> > +{
> > + struct i2c_client *client = data;
> > +
> > + /* Unregister the dummy client */
> > + i2c_unregister_device(client);
> > +}
> > +
> > static int cm32181_probe(struct i2c_client *client)
> > {
> > struct device *dev = &client->dev;
> > @@ -460,6 +468,10 @@ static int cm32181_probe(struct i2c_client *client)
> > client = i2c_acpi_new_device(dev, 1, &board_info);
> > if (IS_ERR(client))
> > return PTR_ERR(client);
> > +
> > + ret = devm_add_action_or_reset(dev, cm32181_unregister_dummy_client, client);
> > + if (ret)
> > + return ret;
> > }
> >
> > cm32181 = iio_priv(indio_dev);
>
