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
e4a7b9b0

 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>

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;
 }

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;
 }

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;
 }
 

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;
 }

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;
 }
 

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;
 }

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;
 }

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;

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;

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;

drivers/i2c/i2c-smbus.c

@@ -173,7 +173,6 @@ static int smbalert_remove(struct i2c_client *ara)
 
 	cancel_work_sync(&alert->alert);
 
-	i2c_set_clientdata(ara, NULL);
 	kfree(alert);
 	return 0;
 }

drivers/input/keyboard/adp5588-keys.c

@@ -287,7 +287,6 @@ static int __devexit adp5588_remove(struct i2c_client *client)
 	free_irq(client->irq, kpad);
 	cancel_delayed_work_sync(&kpad->work);
 	input_unregister_device(kpad->input);
-	i2c_set_clientdata(client, NULL);
 	kfree(kpad);
 
 	return 0;

drivers/input/keyboard/lm8323.c

@@ -778,8 +778,6 @@ static int __devexit lm8323_remove(struct i2c_client *client)
 	struct lm8323_chip *lm = i2c_get_clientdata(client);
 	int i;
 
-	i2c_set_clientdata(client, NULL);
-
 	disable_irq_wake(client->irq);
 	free_irq(client->irq, lm);
 	cancel_work_sync(&lm->work);

drivers/input/keyboard/max7359_keypad.c

@@ -265,7 +265,6 @@ static int __devexit max7359_remove(struct i2c_client *client)
 
 	free_irq(client->irq, keypad);
 	input_unregister_device(keypad->input_dev);
-	i2c_set_clientdata(client, NULL);
 	kfree(keypad);
 
 	return 0;

drivers/input/keyboard/qt2160.c

@@ -358,7 +358,6 @@ static int __devexit qt2160_remove(struct i2c_client *client)
 	input_unregister_device(qt2160->input);
 	kfree(qt2160);
 
-	i2c_set_clientdata(client, NULL);
 	return 0;
 }
 

drivers/input/keyboard/tca6416-keypad.c

@@ -316,8 +316,6 @@ static int __devexit tca6416_keypad_remove(struct i2c_client *client)
 	input_unregister_device(chip->input);
 	kfree(chip);
 
-	i2c_set_clientdata(client, NULL);
-
 	return 0;
 }
 

drivers/input/misc/ad714x-i2c.c

@@ -97,7 +97,6 @@ static int __devexit ad714x_i2c_remove(struct i2c_client *client)
 	struct ad714x_chip *chip = i2c_get_clientdata(client);
 
 	ad714x_remove(chip);
-	i2c_set_clientdata(client, NULL);
 
 	return 0;
 }

drivers/input/misc/pcf8574_keypad.c

@@ -168,8 +168,6 @@ static int __devexit pcf8574_kp_remove(struct i2c_client *client)
 	input_unregister_device(lp->idev);
 	kfree(lp);
 
-	i2c_set_clientdata(client, NULL);
-
 	return 0;
 }
 

drivers/input/mouse/synaptics_i2c.c

@@ -613,7 +613,6 @@ static int __devexit synaptics_i2c_remove(struct i2c_client *client)
 		free_irq(client->irq, touch);
 
 	input_unregister_device(touch->input);
-	i2c_set_clientdata(client, NULL);
 	kfree(touch);
 
 	return 0;

drivers/input/touchscreen/ad7879.c

@@ -812,10 +812,8 @@ static int __devinit ad7879_probe(struct i2c_client *client,
 	ts->bus = client;
 
 	error = ad7879_construct(client, ts);
-	if (error) {
-		i2c_set_clientdata(client, NULL);
+	if (error)
 		kfree(ts);
-	}
 
 	return error;
 }
@@ -825,7 +823,6 @@ static int __devexit ad7879_remove(struct i2c_client *client)
 	struct ad7879 *ts = dev_get_drvdata(&client->dev);
 
 	ad7879_destroy(client, ts);
-	i2c_set_clientdata(client, NULL);
 	kfree(ts);
 
 	return 0;