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>

1 files changed, 1 insertions, 7 deletions

diff --git a/drivers/media/video/tcm825x.c b/drivers/media/video/tcm825x.c
index b90e9da3167d..54681a535822 100644
--- a/drivers/media/video/tcm825x.c
+++ b/drivers/media/video/tcm825x.c
@@ -850,7 +850,6 @@ static int tcm825x_probe(struct i2c_client *client,
                          const struct i2c_device_id *did)
 {
         struct tcm825x_sensor *sensor = &tcm825x;
-        int rval;
 
         if (i2c_get_clientdata(client))
                 return -EBUSY;
@@ -871,11 +870,7 @@ static int tcm825x_probe(struct i2c_client *client,
         sensor->pix.height = tcm825x_sizes[QVGA].height;
         sensor->pix.pixelformat = V4L2_PIX_FMT_RGB565;
 
-        rval = v4l2_int_device_register(sensor->v4l2_int_device);
-        if (rval)
-                i2c_set_clientdata(client, NULL);
-
-        return rval;
+        return v4l2_int_device_register(sensor->v4l2_int_device);
 }
 
 static int tcm825x_remove(struct i2c_client *client)
@@ -886,7 +881,6 @@ static int tcm825x_remove(struct i2c_client *client)
                 return -ENODEV; /* our client isn't attached */
 
         v4l2_int_device_unregister(sensor->v4l2_int_device);
-        i2c_set_clientdata(client, NULL);
 
         return 0;
 }