misc: ad525x_dpot: Make ad_dpot_remove() return void

Up to now ad_dpot_remove() returns zero unconditionally. Make it return
void instead which makes it easier to see in the callers that there is
no error to handle.

Also the return value of i2c and spi remove callbacks is ignored anyway.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20211012153945.2651412-12-u.kleine-koenig@pengutronix.de
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/ad525x_dpot-i2c.c

@@ -69,7 +69,8 @@ static int ad_dpot_i2c_probe(struct i2c_client *client,
 
 static int ad_dpot_i2c_remove(struct i2c_client *client)
 {
-	return ad_dpot_remove(&client->dev);
+	ad_dpot_remove(&client->dev);
+	return 0;
 }
 
 static const struct i2c_device_id ad_dpot_id[] = {

drivers/misc/ad525x_dpot-spi.c

@@ -92,7 +92,8 @@ static int ad_dpot_spi_probe(struct spi_device *spi)
 
 static int ad_dpot_spi_remove(struct spi_device *spi)
 {
-	return ad_dpot_remove(&spi->dev);
+	ad_dpot_remove(&spi->dev);
+	return 0;
 }
 
 static const struct spi_device_id ad_dpot_spi_id[] = {

drivers/misc/ad525x_dpot.c

@@ -743,7 +743,7 @@ int ad_dpot_probe(struct device *dev,
 }
 EXPORT_SYMBOL(ad_dpot_probe);
 
-int ad_dpot_remove(struct device *dev)
+void ad_dpot_remove(struct device *dev)
 {
 	struct dpot_data *data = dev_get_drvdata(dev);
 	int i;
@@ -753,8 +753,6 @@ int ad_dpot_remove(struct device *dev)
 			ad_dpot_remove_files(dev, data->feat, i);
 
 	kfree(data);
-
-	return 0;
 }
 EXPORT_SYMBOL(ad_dpot_remove);
 

drivers/misc/ad525x_dpot.h

@@ -209,6 +209,6 @@ struct ad_dpot_bus_data {
 
 int ad_dpot_probe(struct device *dev, struct ad_dpot_bus_data *bdata,
 		  unsigned long devid, const char *name);
-int ad_dpot_remove(struct device *dev);
+void ad_dpot_remove(struct device *dev);
 
 #endif