iio: light: cm32181: Unregister second I2C client if present

commit 099cc90a5a62e68b2fe3a42da011ab929b98bf73 upstream.

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@redhat.com>
Suggested-by: Hans de Goede <hdegoede@redhat.com>
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@canonical.com>
Link: https://lore.kernel.org/r/20230223020059.2013993-1-kai.heng.feng@canonical.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/light/cm32181.c b/drivers/iio/light/cm32181.c
index b1674a5..d4a34a3 100644 (file)
--- 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);