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>

11 files changed, 11 insertions, 28 deletions

diff --git a/drivers/media/tuners/e4000.c b/drivers/media/tuners/e4000.c
index a3a8d051dc6c..61ae884ea59a 100644
--- a/drivers/media/tuners/e4000.c
+++ b/drivers/media/tuners/e4000.c
@@ -706,7 +706,7 @@ err:
 	return ret;
 }
 
-static int e4000_remove(struct i2c_client *client)
+static void e4000_remove(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
 	struct e4000_dev *dev = container_of(sd, struct e4000_dev, sd);
@@ -717,8 +717,6 @@ static int e4000_remove(struct i2c_client *client)
 	v4l2_ctrl_handler_free(&dev->hdl);
 #endif
 	kfree(dev);
-
-	return 0;
 }
 
 static const struct i2c_device_id e4000_id_table[] = {
diff --git a/drivers/media/tuners/fc2580.c b/drivers/media/tuners/fc2580.c
index 1b5961bdf2d5..f30932e1a0f3 100644
--- a/drivers/media/tuners/fc2580.c
+++ b/drivers/media/tuners/fc2580.c
@@ -588,7 +588,7 @@ err:
 	return ret;
 }
 
-static int fc2580_remove(struct i2c_client *client)
+static void fc2580_remove(struct i2c_client *client)
 {
 	struct fc2580_dev *dev = i2c_get_clientdata(client);
 
@@ -598,7 +598,6 @@ static int fc2580_remove(struct i2c_client *client)
 	v4l2_ctrl_handler_free(&dev->hdl);
 #endif
 	kfree(dev);
-	return 0;
 }
 
 static const struct i2c_device_id fc2580_id_table[] = {
diff --git a/drivers/media/tuners/m88rs6000t.c b/drivers/media/tuners/m88rs6000t.c
index 8647c50b66e5..e32e3e9daa15 100644
--- a/drivers/media/tuners/m88rs6000t.c
+++ b/drivers/media/tuners/m88rs6000t.c
@@ -697,7 +697,7 @@ err:
 	return ret;
 }
 
-static int m88rs6000t_remove(struct i2c_client *client)
+static void m88rs6000t_remove(struct i2c_client *client)
 {
 	struct m88rs6000t_dev *dev = i2c_get_clientdata(client);
 	struct dvb_frontend *fe = dev->cfg.fe;
@@ -707,8 +707,6 @@ static int m88rs6000t_remove(struct i2c_client *client)
 	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
 	fe->tuner_priv = NULL;
 	kfree(dev);
-
-	return 0;
 }
 
 static const struct i2c_device_id m88rs6000t_id[] = {
diff --git a/drivers/media/tuners/mt2060.c b/drivers/media/tuners/mt2060.c
index 204e6186bf71..322c806228a5 100644
--- a/drivers/media/tuners/mt2060.c
+++ b/drivers/media/tuners/mt2060.c
@@ -509,11 +509,9 @@ err:
 	return ret;
 }
 
-static int mt2060_remove(struct i2c_client *client)
+static void mt2060_remove(struct i2c_client *client)
 {
 	dev_dbg(&client->dev, "\n");
-
-	return 0;
 }
 
 static const struct i2c_device_id mt2060_id_table[] = {
diff --git a/drivers/media/tuners/mxl301rf.c b/drivers/media/tuners/mxl301rf.c
index c628435a1b06..6422056185a9 100644
--- a/drivers/media/tuners/mxl301rf.c
+++ b/drivers/media/tuners/mxl301rf.c
@@ -307,14 +307,13 @@ static int mxl301rf_probe(struct i2c_client *client,
 	return 0;
 }
 
-static int mxl301rf_remove(struct i2c_client *client)
+static void mxl301rf_remove(struct i2c_client *client)
 {
 	struct mxl301rf_state *state;
 
 	state = cfg_to_state(i2c_get_clientdata(client));
 	state->cfg.fe->tuner_priv = NULL;
 	kfree(state);
-	return 0;
 }
 
 
diff --git a/drivers/media/tuners/qm1d1b0004.c b/drivers/media/tuners/qm1d1b0004.c
index 008ad870c00f..9cba0893207c 100644
--- a/drivers/media/tuners/qm1d1b0004.c
+++ b/drivers/media/tuners/qm1d1b0004.c
@@ -232,14 +232,13 @@ err_mem:
 	return ret;
 }
 
-static int qm1d1b0004_remove(struct i2c_client *client)
+static void qm1d1b0004_remove(struct i2c_client *client)
 {
 	struct dvb_frontend *fe;
 
 	fe = i2c_get_clientdata(client);
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;
-	return 0;
 }
 
 
diff --git a/drivers/media/tuners/qm1d1c0042.c b/drivers/media/tuners/qm1d1c0042.c
index 53aa2558f71e..2d60bf501fb5 100644
--- a/drivers/media/tuners/qm1d1c0042.c
+++ b/drivers/media/tuners/qm1d1c0042.c
@@ -424,14 +424,13 @@ static int qm1d1c0042_probe(struct i2c_client *client,
 	return 0;
 }
 
-static int qm1d1c0042_remove(struct i2c_client *client)
+static void qm1d1c0042_remove(struct i2c_client *client)
 {
 	struct qm1d1c0042_state *state;
 
 	state = cfg_to_state(i2c_get_clientdata(client));
 	state->cfg.fe->tuner_priv = NULL;
 	kfree(state);
-	return 0;
 }
 
 
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index 0de587b412d4..476b32c04c20 100644
--- a/drivers/media/tuners/si2157.c
+++ b/drivers/media/tuners/si2157.c
@@ -951,7 +951,7 @@ err:
 	return ret;
 }
 
-static int si2157_remove(struct i2c_client *client)
+static void si2157_remove(struct i2c_client *client)
 {
 	struct si2157_dev *dev = i2c_get_clientdata(client);
 	struct dvb_frontend *fe = dev->fe;
@@ -969,8 +969,6 @@ static int si2157_remove(struct i2c_client *client)
 	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
 	fe->tuner_priv = NULL;
 	kfree(dev);
-
-	return 0;
 }
 
 /*
diff --git a/drivers/media/tuners/tda18212.c b/drivers/media/tuners/tda18212.c
index bf48f1cd83d2..eb97711c9c68 100644
--- a/drivers/media/tuners/tda18212.c
+++ b/drivers/media/tuners/tda18212.c
@@ -242,7 +242,7 @@ err:
 	return ret;
 }
 
-static int tda18212_remove(struct i2c_client *client)
+static void tda18212_remove(struct i2c_client *client)
 {
 	struct tda18212_dev *dev = i2c_get_clientdata(client);
 	struct dvb_frontend *fe = dev->cfg.fe;
@@ -252,8 +252,6 @@ static int tda18212_remove(struct i2c_client *client)
 	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
 	fe->tuner_priv = NULL;
 	kfree(dev);
-
-	return 0;
 }
 
 static const struct i2c_device_id tda18212_id[] = {
diff --git a/drivers/media/tuners/tda18250.c b/drivers/media/tuners/tda18250.c
index 8a5781b966ee..e404a5afad4c 100644
--- a/drivers/media/tuners/tda18250.c
+++ b/drivers/media/tuners/tda18250.c
@@ -856,7 +856,7 @@ err:
 	return ret;
 }
 
-static int tda18250_remove(struct i2c_client *client)
+static void tda18250_remove(struct i2c_client *client)
 {
 	struct tda18250_dev *dev = i2c_get_clientdata(client);
 	struct dvb_frontend *fe = dev->fe;
@@ -866,8 +866,6 @@ static int tda18250_remove(struct i2c_client *client)
 	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
 	fe->tuner_priv = NULL;
 	kfree(dev);
-
-	return 0;
 }
 
 static const struct i2c_device_id tda18250_id_table[] = {
diff --git a/drivers/media/tuners/tua9001.c b/drivers/media/tuners/tua9001.c
index af7d5ea1f77e..d141d000b819 100644
--- a/drivers/media/tuners/tua9001.c
+++ b/drivers/media/tuners/tua9001.c
@@ -227,7 +227,7 @@ err:
 	return ret;
 }
 
-static int tua9001_remove(struct i2c_client *client)
+static void tua9001_remove(struct i2c_client *client)
 {
 	struct tua9001_dev *dev = i2c_get_clientdata(client);
 	struct dvb_frontend *fe = dev->fe;
@@ -243,7 +243,6 @@ static int tua9001_remove(struct i2c_client *client)
 			dev_err(&client->dev, "Tuner disable failed (%pe)\n", ERR_PTR(ret));
 	}
 	kfree(dev);
-	return 0;
 }
 
 static const struct i2c_device_id tua9001_id_table[] = {