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>

3 files changed, 3 insertions, 8 deletions

diff --git a/drivers/leds/flash/leds-as3645a.c b/drivers/leds/flash/leds-as3645a.c
index aa3f82be0a9c..bb2249771acb 100644
--- a/drivers/leds/flash/leds-as3645a.c
+++ b/drivers/leds/flash/leds-as3645a.c
@@ -724,7 +724,7 @@ out_put_nodes:
 	return rval;
 }
 
-static int as3645a_remove(struct i2c_client *client)
+static void as3645a_remove(struct i2c_client *client)
 {
 	struct as3645a *flash = i2c_get_clientdata(client);
 
@@ -740,8 +740,6 @@ static int as3645a_remove(struct i2c_client *client)
 
 	fwnode_handle_put(flash->flash_node);
 	fwnode_handle_put(flash->indicator_node);
-
-	return 0;
 }
 
 static const struct i2c_device_id as3645a_id_table[] = {
diff --git a/drivers/leds/flash/leds-lm3601x.c b/drivers/leds/flash/leds-lm3601x.c
index 37e1d6e68687..78730e066a73 100644
--- a/drivers/leds/flash/leds-lm3601x.c
+++ b/drivers/leds/flash/leds-lm3601x.c
@@ -440,7 +440,7 @@ static int lm3601x_probe(struct i2c_client *client)
 	return lm3601x_register_leds(led, fwnode);
 }
 
-static int lm3601x_remove(struct i2c_client *client)
+static void lm3601x_remove(struct i2c_client *client)
 {
 	struct lm3601x_led *led = i2c_get_clientdata(client);
 	int ret;
@@ -450,8 +450,6 @@ static int lm3601x_remove(struct i2c_client *client)
 	if (ret)
 		dev_warn(&client->dev,
 			 "Failed to put into standby (%pe)\n", ERR_PTR(ret));
-
-	return 0;
 }
 
 static const struct i2c_device_id lm3601x_id[] = {
diff --git a/drivers/leds/flash/leds-rt4505.c b/drivers/leds/flash/leds-rt4505.c
index ee129ab7255d..e404fe8b0314 100644
--- a/drivers/leds/flash/leds-rt4505.c
+++ b/drivers/leds/flash/leds-rt4505.c
@@ -393,12 +393,11 @@ static int rt4505_probe(struct i2c_client *client)
 	return 0;
 }
 
-static int rt4505_remove(struct i2c_client *client)
+static void rt4505_remove(struct i2c_client *client)
 {
 	struct rt4505_priv *priv = i2c_get_clientdata(client);
 
 	v4l2_flash_release(priv->v4l2_flash);
-	return 0;
 }
 
 static void rt4505_shutdown(struct i2c_client *client)