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>

16 files changed, 17 insertions, 40 deletions

diff --git a/drivers/misc/ad525x_dpot-i2c.c b/drivers/misc/ad525x_dpot-i2c.c
index 0ee0c6d808c3..28ffb4377d98 100644
--- a/drivers/misc/ad525x_dpot-i2c.c
+++ b/drivers/misc/ad525x_dpot-i2c.c
@@ -67,10 +67,9 @@ static int ad_dpot_i2c_probe(struct i2c_client *client,
 	return ad_dpot_probe(&client->dev, &bdata, id->driver_data, id->name);
 }
 
-static int ad_dpot_i2c_remove(struct i2c_client *client)
+static void ad_dpot_i2c_remove(struct i2c_client *client)
 {
 	ad_dpot_remove(&client->dev);
-	return 0;
 }
 
 static const struct i2c_device_id ad_dpot_id[] = {
diff --git a/drivers/misc/apds9802als.c b/drivers/misc/apds9802als.c
index 6fff44b952bd..a32431f4b370 100644
--- a/drivers/misc/apds9802als.c
+++ b/drivers/misc/apds9802als.c
@@ -242,7 +242,7 @@ als_error1:
 	return res;
 }
 
-static int apds9802als_remove(struct i2c_client *client)
+static void apds9802als_remove(struct i2c_client *client)
 {
 	struct als_data *data = i2c_get_clientdata(client);
 
@@ -256,7 +256,6 @@ static int apds9802als_remove(struct i2c_client *client)
 	pm_runtime_put_noidle(&client->dev);
 
 	kfree(data);
-	return 0;
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/misc/apds990x.c b/drivers/misc/apds990x.c
index 45f5b997a0e1..e2100cc42ce8 100644
--- a/drivers/misc/apds990x.c
+++ b/drivers/misc/apds990x.c
@@ -1185,7 +1185,7 @@ fail1:
 	return err;
 }
 
-static int apds990x_remove(struct i2c_client *client)
+static void apds990x_remove(struct i2c_client *client)
 {
 	struct apds990x_chip *chip = i2c_get_clientdata(client);
 
@@ -1205,7 +1205,6 @@ static int apds990x_remove(struct i2c_client *client)
 	regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
 
 	kfree(chip);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
diff --git a/drivers/misc/bh1770glc.c b/drivers/misc/bh1770glc.c
index 0581bb9cef2e..d0dfa674414c 100644
--- a/drivers/misc/bh1770glc.c
+++ b/drivers/misc/bh1770glc.c
@@ -1280,7 +1280,7 @@ fail0:
 	return err;
 }
 
-static int bh1770_remove(struct i2c_client *client)
+static void bh1770_remove(struct i2c_client *client)
 {
 	struct bh1770_chip *chip = i2c_get_clientdata(client);
 
@@ -1299,8 +1299,6 @@ static int bh1770_remove(struct i2c_client *client)
 
 	pm_runtime_disable(&client->dev);
 	pm_runtime_set_suspended(&client->dev);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
diff --git a/drivers/misc/ds1682.c b/drivers/misc/ds1682.c
index 42f316c2d719..0698ddc5f4d5 100644
--- a/drivers/misc/ds1682.c
+++ b/drivers/misc/ds1682.c
@@ -228,11 +228,10 @@ static int ds1682_probe(struct i2c_client *client,
 	return rc;
 }
 
-static int ds1682_remove(struct i2c_client *client)
+static void ds1682_remove(struct i2c_client *client)
 {
 	sysfs_remove_bin_file(&client->dev.kobj, &ds1682_eeprom_attr);
 	sysfs_remove_group(&client->dev.kobj, &ds1682_group);
-	return 0;
 }
 
 static const struct i2c_device_id ds1682_id[] = {
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 633e1cf08d6e..938c4f41b98c 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -791,7 +791,7 @@ static int at24_probe(struct i2c_client *client)
 	return 0;
 }
 
-static int at24_remove(struct i2c_client *client)
+static void at24_remove(struct i2c_client *client)
 {
 	struct at24_data *at24 = i2c_get_clientdata(client);
 
@@ -801,8 +801,6 @@ static int at24_remove(struct i2c_client *client)
 			regulator_disable(at24->vcc_reg);
 		pm_runtime_set_suspended(&client->dev);
 	}
-
-	return 0;
 }
 
 static int __maybe_unused at24_suspend(struct device *dev)
diff --git a/drivers/misc/eeprom/ee1004.c b/drivers/misc/eeprom/ee1004.c
index 9fbfe784d710..c8c6deb7ed89 100644
--- a/drivers/misc/eeprom/ee1004.c
+++ b/drivers/misc/eeprom/ee1004.c
@@ -219,14 +219,12 @@ static int ee1004_probe(struct i2c_client *client)
 	return err;
 }
 
-static int ee1004_remove(struct i2c_client *client)
+static void ee1004_remove(struct i2c_client *client)
 {
 	/* Remove page select clients if this is the last device */
 	mutex_lock(&ee1004_bus_lock);
 	ee1004_cleanup(EE1004_NUM_PAGES);
 	mutex_unlock(&ee1004_bus_lock);
-
-	return 0;
 }
 
 /*-------------------------------------------------------------------------*/
diff --git a/drivers/misc/eeprom/eeprom.c b/drivers/misc/eeprom/eeprom.c
index 34fa385dfd4b..4a9445fea93d 100644
--- a/drivers/misc/eeprom/eeprom.c
+++ b/drivers/misc/eeprom/eeprom.c
@@ -183,11 +183,9 @@ static int eeprom_probe(struct i2c_client *client,
 	return sysfs_create_bin_file(&client->dev.kobj, &eeprom_attr);
 }
 
-static int eeprom_remove(struct i2c_client *client)
+static void eeprom_remove(struct i2c_client *client)
 {
 	sysfs_remove_bin_file(&client->dev.kobj, &eeprom_attr);
-
-	return 0;
 }
 
 static const struct i2c_device_id eeprom_id[] = {
diff --git a/drivers/misc/eeprom/idt_89hpesx.c b/drivers/misc/eeprom/idt_89hpesx.c
index 9aec3338e37d..ada2a3af36d7 100644
--- a/drivers/misc/eeprom/idt_89hpesx.c
+++ b/drivers/misc/eeprom/idt_89hpesx.c
@@ -1405,7 +1405,7 @@ err_free_pdev:
 /*
  * idt_remove() - IDT 89HPESx driver remove() callback method
  */
-static int idt_remove(struct i2c_client *client)
+static void idt_remove(struct i2c_client *client)
 {
 	struct idt_89hpesx_dev *pdev = i2c_get_clientdata(client);
 
@@ -1417,8 +1417,6 @@ static int idt_remove(struct i2c_client *client)
 
 	/* Discard driver data structure */
 	idt_free_pdev(pdev);
-
-	return 0;
 }
 
 /*
diff --git a/drivers/misc/eeprom/max6875.c b/drivers/misc/eeprom/max6875.c
index 9da81f6d4a1c..6bd4f4339af4 100644
--- a/drivers/misc/eeprom/max6875.c
+++ b/drivers/misc/eeprom/max6875.c
@@ -173,7 +173,7 @@ exit_kfree:
 	return err;
 }
 
-static int max6875_remove(struct i2c_client *client)
+static void max6875_remove(struct i2c_client *client)
 {
 	struct max6875_data *data = i2c_get_clientdata(client);
 
@@ -181,8 +181,6 @@ static int max6875_remove(struct i2c_client *client)
 
 	sysfs_remove_bin_file(&client->dev.kobj, &user_eeprom_attr);
 	kfree(data);
-
-	return 0;
 }
 
 static const struct i2c_device_id max6875_id[] = {
diff --git a/drivers/misc/hmc6352.c b/drivers/misc/hmc6352.c
index 572a2ff10f00..42b9adef28a3 100644
--- a/drivers/misc/hmc6352.c
+++ b/drivers/misc/hmc6352.c
@@ -116,10 +116,9 @@ static int hmc6352_probe(struct i2c_client *client,
 	return 0;
 }
 
-static int hmc6352_remove(struct i2c_client *client)
+static void hmc6352_remove(struct i2c_client *client)
 {
 	sysfs_remove_group(&client->dev.kobj, &m_compass_gr);
-	return 0;
 }
 
 static const struct i2c_device_id hmc6352_id[] = {
diff --git a/drivers/misc/ics932s401.c b/drivers/misc/ics932s401.c
index 0f9ea75b0b18..2c4bb6d6e1a0 100644
--- a/drivers/misc/ics932s401.c
+++ b/drivers/misc/ics932s401.c
@@ -93,7 +93,7 @@ static int ics932s401_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id);
 static int ics932s401_detect(struct i2c_client *client,
 			  struct i2c_board_info *info);
-static int ics932s401_remove(struct i2c_client *client);
+static void ics932s401_remove(struct i2c_client *client);
 
 static const struct i2c_device_id ics932s401_id[] = {
 	{ "ics932s401", 0 },
@@ -460,13 +460,12 @@ exit:
 	return err;
 }
 
-static int ics932s401_remove(struct i2c_client *client)
+static void ics932s401_remove(struct i2c_client *client)
 {
 	struct ics932s401_data *data = i2c_get_clientdata(client);
 
 	sysfs_remove_group(&client->dev.kobj, &data->attrs);
 	kfree(data);
-	return 0;
 }
 
 module_i2c_driver(ics932s401_driver);
diff --git a/drivers/misc/isl29003.c b/drivers/misc/isl29003.c
index 703d20e83ebd..8ab61be79c76 100644
--- a/drivers/misc/isl29003.c
+++ b/drivers/misc/isl29003.c
@@ -410,12 +410,11 @@ exit_kfree:
 	return err;
 }
 
-static int isl29003_remove(struct i2c_client *client)
+static void isl29003_remove(struct i2c_client *client)
 {
 	sysfs_remove_group(&client->dev.kobj, &isl29003_attr_group);
 	isl29003_set_power_state(client, 0);
 	kfree(i2c_get_clientdata(client));
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
diff --git a/drivers/misc/isl29020.c b/drivers/misc/isl29020.c
index fc5ff2805b94..c6f2a94f501a 100644
--- a/drivers/misc/isl29020.c
+++ b/drivers/misc/isl29020.c
@@ -171,11 +171,10 @@ static int  isl29020_probe(struct i2c_client *client,
 	return res;
 }
 
-static int isl29020_remove(struct i2c_client *client)
+static void isl29020_remove(struct i2c_client *client)
 {
 	pm_runtime_disable(&client->dev);
 	sysfs_remove_group(&client->dev.kobj, &m_als_gr);
-	return 0;
 }
 
 static const struct i2c_device_id isl29020_id[] = {
diff --git a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
index 52555d2e824b..d7daa01fe7ca 100644
--- a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
+++ b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
@@ -177,7 +177,7 @@ fail:
 	return ret;
 }
 
-static int lis3lv02d_i2c_remove(struct i2c_client *client)
+static void lis3lv02d_i2c_remove(struct i2c_client *client)
 {
 	struct lis3lv02d *lis3 = i2c_get_clientdata(client);
 	struct lis3lv02d_platform_data *pdata = client->dev.platform_data;
@@ -190,7 +190,6 @@ static int lis3lv02d_i2c_remove(struct i2c_client *client)
 
 	regulator_bulk_free(ARRAY_SIZE(lis3->regulators),
 			    lis3_dev.regulators);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
diff --git a/drivers/misc/tsl2550.c b/drivers/misc/tsl2550.c
index 6d71865c8042..1652fb9b3856 100644
--- a/drivers/misc/tsl2550.c
+++ b/drivers/misc/tsl2550.c
@@ -389,7 +389,7 @@ exit:
 	return err;
 }
 
-static int tsl2550_remove(struct i2c_client *client)
+static void tsl2550_remove(struct i2c_client *client)
 {
 	sysfs_remove_group(&client->dev.kobj, &tsl2550_attr_group);
 
@@ -397,8 +397,6 @@ static int tsl2550_remove(struct i2c_client *client)
 	tsl2550_set_power_state(client, 0);
 
 	kfree(i2c_get_clientdata(client));
-
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP