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>

4 files changed, 1 insertions, 9 deletions

diff --git a/drivers/leds/leds-bd2802.c b/drivers/leds/leds-bd2802.c
index 286b501a3573..5dcdf9d69b3a 100644
--- a/drivers/leds/leds-bd2802.c
+++ b/drivers/leds/leds-bd2802.c
@@ -742,7 +742,6 @@ failed_unregister_dev_file:
         for (i--; i >= 0; i--)
                 device_remove_file(&led->client->dev, bd2802_attributes[i]);
 failed_free:
-        i2c_set_clientdata(client, NULL);
         kfree(led);
 
         return ret;
@@ -759,7 +758,6 @@ static int __exit bd2802_remove(struct i2c_client *client)
                 bd2802_disable_adv_conf(led);
         for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++)
                 device_remove_file(&led->client->dev, bd2802_attributes[i]);
-        i2c_set_clientdata(client, NULL);
         kfree(led);
 
         return 0;
diff --git a/drivers/leds/leds-lp3944.c b/drivers/leds/leds-lp3944.c
index 932a58da76c4..9010c054615e 100644
--- a/drivers/leds/leds-lp3944.c
+++ b/drivers/leds/leds-lp3944.c
@@ -432,7 +432,6 @@ static int __devexit lp3944_remove(struct i2c_client *client)
                 }
 
         kfree(data);
-        i2c_set_clientdata(client, NULL);
 
         return 0;
 }
diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
index 6682175fa9f7..43d08756d823 100644
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -320,10 +320,8 @@ static int pca9532_probe(struct i2c_client *client,
         mutex_init(&data->update_lock);
 
         err = pca9532_configure(client, data, pca9532_pdata);
-        if (err) {
+        if (err)
                 kfree(data);
-                i2c_set_clientdata(client, NULL);
-        }
 
         return err;
 }
@@ -351,7 +349,6 @@ static int pca9532_remove(struct i2c_client *client)
                 }
 
         kfree(data);
-        i2c_set_clientdata(client, NULL);
         return 0;
 }
 
diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
index 8ff50f234190..66aa3e8e786f 100644
--- a/drivers/leds/leds-pca955x.c
+++ b/drivers/leds/leds-pca955x.c
@@ -342,7 +342,6 @@ exit:
         }
 
         kfree(pca955x);
-        i2c_set_clientdata(client, NULL);
 
         return err;
 }
@@ -358,7 +357,6 @@ static int __devexit pca955x_remove(struct i2c_client *client)
         }
 
         kfree(pca955x);
-        i2c_set_clientdata(client, NULL);
 
         return 0;
 }