i2c: Remove all i2c_set_clientdata(client, NULL) in drivers

I2C drivers can use the clientdata-pointer to point to private data. As I2C
devices are not really unregistered, but merely detached from their driver, it
used to be the drivers obligation to clear this pointer during remove() or a
failed probe(). As a couple of drivers forgot to do this, it was agreed that it
was cleaner if the i2c-core does this clearance when appropriate, as there is
no guarantee for the lifetime of the clientdata-pointer after remove() anyhow.
This feature was added to the core with commit
e4a7b9b04de15f6b63da5ccdd373ffa3057a3681 to fix the faulty drivers.

As there is no need anymore to clear the clientdata-pointer, remove all current
occurrences in the drivers to simplify the code and prevent confusion.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Richard Purdie <rpurdie@linux.intel.com>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

10 files changed, 0 insertions, 18 deletions

diff --git a/drivers/hwmon/adt7411.c b/drivers/hwmon/adt7411.c
index 4086c72..f13c843 100644
--- a/drivers/hwmon/adt7411.c
+++ b/drivers/hwmon/adt7411.c
@@ -316,7 +316,6 @@ static int __devinit adt7411_probe(struct i2c_client *client,
  exit_remove:
 	sysfs_remove_group(&client->dev.kobj, &adt7411_attr_grp);
  exit_free:
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 	return ret;
 }
@@ -327,7 +326,6 @@ static int __devexit adt7411_remove(struct i2c_client *client)
 
 	hwmon_device_unregister(data->hwmon_dev);
 	sysfs_remove_group(&client->dev.kobj, &adt7411_attr_grp);
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 	return 0;
 }
diff --git a/drivers/hwmon/asc7621.c b/drivers/hwmon/asc7621.c
index 0f388ad..3b973f3 100644
--- a/drivers/hwmon/asc7621.c
+++ b/drivers/hwmon/asc7621.c
@@ -1141,7 +1141,6 @@ exit_remove:
 				   &(asc7621_params[i].sda.dev_attr));
 	}
 
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 	return err;
 }
@@ -1196,7 +1195,6 @@ static int asc7621_remove(struct i2c_client *client)
 				   &(asc7621_params[i].sda.dev_attr));
 	}
 
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 	return 0;
 }
diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
index bad2cf3..0f58ecc 100644
--- a/drivers/hwmon/f75375s.c
+++ b/drivers/hwmon/f75375s.c
@@ -662,7 +662,6 @@ exit_remove:
 	sysfs_remove_group(&client->dev.kobj, &f75375_group);
 exit_free:
 	kfree(data);
-	i2c_set_clientdata(client, NULL);
 	return err;
 }
 
@@ -672,7 +671,6 @@ static int f75375_remove(struct i2c_client *client)
 	hwmon_device_unregister(data->hwmon_dev);
 	sysfs_remove_group(&client->dev.kobj, &f75375_group);
 	kfree(data);
-	i2c_set_clientdata(client, NULL);
 	return 0;
 }
 
diff --git a/drivers/hwmon/g760a.c b/drivers/hwmon/g760a.c
index 09ea12e..1f63d1a 100644
--- a/drivers/hwmon/g760a.c
+++ b/drivers/hwmon/g760a.c
@@ -236,7 +236,6 @@ error_hwmon_device_register:
 	sysfs_remove_group(&client->dev.kobj, &g760a_group);
 error_sysfs_create_group:
 	kfree(data);
-	i2c_set_clientdata(client, NULL);
 
 	return err;
 }
@@ -247,7 +246,6 @@ static int g760a_remove(struct i2c_client *client)
 	hwmon_device_unregister(data->hwmon_dev);
 	sysfs_remove_group(&client->dev.kobj, &g760a_group);
 	kfree(data);
-	i2c_set_clientdata(client, NULL);
 
 	return 0;
 }
diff --git a/drivers/hwmon/lm73.c b/drivers/hwmon/lm73.c
index 4d1b76b..29b9030 100644
--- a/drivers/hwmon/lm73.c
+++ b/drivers/hwmon/lm73.c
@@ -136,7 +136,6 @@ static int lm73_remove(struct i2c_client *client)
 
 	hwmon_device_unregister(hwmon_dev);
 	sysfs_remove_group(&client->dev.kobj, &lm73_group);
-	i2c_set_clientdata(client, NULL);
 	return 0;
 }
 
diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 5646342..393f354 100644
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -192,7 +192,6 @@ lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
 exit_remove:
 	sysfs_remove_group(&client->dev.kobj, &lm75_group);
 exit_free:
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 	return status;
 }
@@ -204,7 +203,6 @@ static int lm75_remove(struct i2c_client *client)
 	hwmon_device_unregister(data->hwmon_dev);
 	sysfs_remove_group(&client->dev.kobj, &lm75_group);
 	lm75_write_value(client, LM75_REG_CONF, data->orig_conf);
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 	return 0;
 }
diff --git a/drivers/hwmon/lm95241.c b/drivers/hwmon/lm95241.c
index 8fc8eb8..94741d4 100644
--- a/drivers/hwmon/lm95241.c
+++ b/drivers/hwmon/lm95241.c
@@ -399,7 +399,6 @@ static int lm95241_remove(struct i2c_client *client)
 	hwmon_device_unregister(data->hwmon_dev);
 	sysfs_remove_group(&client->dev.kobj, &lm95241_group);
 
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 	return 0;
 }
diff --git a/drivers/hwmon/tmp102.c b/drivers/hwmon/tmp102.c
index 8013895..93187c3c 100644
--- a/drivers/hwmon/tmp102.c
+++ b/drivers/hwmon/tmp102.c
@@ -224,7 +224,6 @@ fail_remove_sysfs:
 fail_restore_config:
 	tmp102_write_reg(client, TMP102_CONF_REG, tmp102->config_orig);
 fail_free:
-	i2c_set_clientdata(client, NULL);
 	kfree(tmp102);
 
 	return status;
@@ -247,7 +246,6 @@ static int __devexit tmp102_remove(struct i2c_client *client)
 					 config | TMP102_CONF_SD);
 	}
 
-	i2c_set_clientdata(client, NULL);
 	kfree(tmp102);
 
 	return 0;
diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index 738c472..6b4165c 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -295,7 +295,6 @@ exit_remove:
 	sysfs_remove_group(&client->dev.kobj, &tmp421_group);
 
 exit_free:
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 
 	return err;
@@ -308,7 +307,6 @@ static int tmp421_remove(struct i2c_client *client)
 	hwmon_device_unregister(data->hwmon_dev);
 	sysfs_remove_group(&client->dev.kobj, &tmp421_group);
 
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 
 	return 0;
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index 32d4ade..c84b9b4 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -1197,7 +1197,6 @@ ERROR4:
 	if (data->lm75[1])
 		i2c_unregister_device(data->lm75[1]);
 ERROR3:
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 ERROR1:
 	return err;
@@ -1219,7 +1218,6 @@ w83781d_remove(struct i2c_client *client)
 	if (data->lm75[1])
 		i2c_unregister_device(data->lm75[1]);
 
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 
 	return 0;