i2c: Make remove callback return void

The value returned by an i2c driver's remove function is mostly ignored.
(Only an error message is printed if the value is non-zero that the
error is ignored.)

So change the prototype of the remove function to return no value. This
way driver authors are not tempted to assume that passing an error to
the upper layer is a good idea. All drivers are adapted accordingly.
There is no intended change of behaviour, all callbacks were prepared to
return 0 before.

Reviewed-by: Peter Senna Tschudin <peter.senna@gmail.com>
Reviewed-by: Jeremy Kerr <jk@codeconstruct.com.au>
Reviewed-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Crt Mori <cmo@melexis.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Marek Behún <kabel@kernel.org> # for leds-turris-omnia
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Machata <petrm@nvidia.com> # for mlxsw
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com> # for surface3_power
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> # for bmc150-accel-i2c + kxcjk-1013
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> # for media/* + staging/media/*
Acked-by: Miguel Ojeda <ojeda@kernel.org> # for auxdisplay/ht16k33 + auxdisplay/lcd2s
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # for versaclock5
Reviewed-by: Ajay Gupta <ajayg@nvidia.com> # for ucsi_ccg
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # for iio
Acked-by: Peter Rosin <peda@axentia.se> # for i2c-mux-*, max9860
Acked-by: Adrien Grassein <adrien.grassein@gmail.com> # for lontium-lt8912b
Reviewed-by: Jean Delvare <jdelvare@suse.de> # for hwmon, i2c-core and i2c/muxes
Acked-by: Corey Minyard <cminyard@mvista.com> # for IPMI
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> # for drivers/power
Acked-by: Krzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

6 files changed, 6 insertions, 18 deletions

diff --git a/drivers/iio/magnetometer/ak8974.c b/drivers/iio/magnetometer/ak8974.c
index c89a91db0690..7ec9ab3beb45 100644
--- a/drivers/iio/magnetometer/ak8974.c
+++ b/drivers/iio/magnetometer/ak8974.c
@@ -969,7 +969,7 @@ disable_pm:
 	return ret;
 }
 
-static int ak8974_remove(struct i2c_client *i2c)
+static void ak8974_remove(struct i2c_client *i2c)
 {
 	struct iio_dev *indio_dev = i2c_get_clientdata(i2c);
 	struct ak8974 *ak8974 = iio_priv(indio_dev);
@@ -981,8 +981,6 @@ static int ak8974_remove(struct i2c_client *i2c)
 	pm_runtime_disable(&i2c->dev);
 	ak8974_set_power(ak8974, AK8974_PWR_OFF);
 	regulator_bulk_disable(ARRAY_SIZE(ak8974->regs), ak8974->regs);
-
-	return 0;
 }
 
 static int ak8974_runtime_suspend(struct device *dev)
diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index 2432e697150c..caf03a2a98a5 100644
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -1018,7 +1018,7 @@ power_off:
 	return err;
 }
 
-static int ak8975_remove(struct i2c_client *client)
+static void ak8975_remove(struct i2c_client *client)
 {
 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
 	struct ak8975_data *data = iio_priv(indio_dev);
@@ -1030,8 +1030,6 @@ static int ak8975_remove(struct i2c_client *client)
 	iio_triggered_buffer_cleanup(indio_dev);
 	ak8975_set_mode(data, POWER_DOWN);
 	ak8975_power_off(data);
-
-	return 0;
 }
 
 static int ak8975_runtime_suspend(struct device *dev)
diff --git a/drivers/iio/magnetometer/bmc150_magn_i2c.c b/drivers/iio/magnetometer/bmc150_magn_i2c.c
index 65c004411d0f..570deaa87836 100644
--- a/drivers/iio/magnetometer/bmc150_magn_i2c.c
+++ b/drivers/iio/magnetometer/bmc150_magn_i2c.c
@@ -34,11 +34,9 @@ static int bmc150_magn_i2c_probe(struct i2c_client *client,
 	return bmc150_magn_probe(&client->dev, regmap, client->irq, name);
 }
 
-static int bmc150_magn_i2c_remove(struct i2c_client *client)
+static void bmc150_magn_i2c_remove(struct i2c_client *client)
 {
 	bmc150_magn_remove(&client->dev);
-
-	return 0;
 }
 
 static const struct acpi_device_id bmc150_magn_acpi_match[] = {
diff --git a/drivers/iio/magnetometer/hmc5843_i2c.c b/drivers/iio/magnetometer/hmc5843_i2c.c
index 8d2ff8fc204d..fe5e8415b2f2 100644
--- a/drivers/iio/magnetometer/hmc5843_i2c.c
+++ b/drivers/iio/magnetometer/hmc5843_i2c.c
@@ -65,11 +65,9 @@ static int hmc5843_i2c_probe(struct i2c_client *cli,
 			id->driver_data, id->name);
 }
 
-static int hmc5843_i2c_remove(struct i2c_client *client)
+static void hmc5843_i2c_remove(struct i2c_client *client)
 {
 	hmc5843_common_remove(&client->dev);
-
-	return 0;
 }
 
 static const struct i2c_device_id hmc5843_id[] = {
diff --git a/drivers/iio/magnetometer/mag3110.c b/drivers/iio/magnetometer/mag3110.c
index 226439d0bfb5..b870ad803862 100644
--- a/drivers/iio/magnetometer/mag3110.c
+++ b/drivers/iio/magnetometer/mag3110.c
@@ -559,7 +559,7 @@ disable_regulator_vdd:
 	return ret;
 }
 
-static int mag3110_remove(struct i2c_client *client)
+static void mag3110_remove(struct i2c_client *client)
 {
 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
 	struct mag3110_data *data = iio_priv(indio_dev);
@@ -569,8 +569,6 @@ static int mag3110_remove(struct i2c_client *client)
 	mag3110_standby(iio_priv(indio_dev));
 	regulator_disable(data->vddio_reg);
 	regulator_disable(data->vdd_reg);
-
-	return 0;
 }
 
 static int mag3110_suspend(struct device *dev)
diff --git a/drivers/iio/magnetometer/yamaha-yas530.c b/drivers/iio/magnetometer/yamaha-yas530.c
index aeaa4da6923b..c3a10942654e 100644
--- a/drivers/iio/magnetometer/yamaha-yas530.c
+++ b/drivers/iio/magnetometer/yamaha-yas530.c
@@ -943,7 +943,7 @@ reg_off:
 	return ret;
 }
 
-static int yas5xx_remove(struct i2c_client *i2c)
+static void yas5xx_remove(struct i2c_client *i2c)
 {
 	struct iio_dev *indio_dev = i2c_get_clientdata(i2c);
 	struct yas5xx *yas5xx = iio_priv(indio_dev);
@@ -961,8 +961,6 @@ static int yas5xx_remove(struct i2c_client *i2c)
 	pm_runtime_disable(dev);
 	gpiod_set_value_cansleep(yas5xx->reset, 1);
 	regulator_bulk_disable(ARRAY_SIZE(yas5xx->regs), yas5xx->regs);
-
-	return 0;
 }
 
 static int yas5xx_runtime_suspend(struct device *dev)