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>

11 files changed, 1 insertions, 26 deletions

diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c b/drivers/media/radio/si470x/radio-si470x-i2c.c
index a5844d08d8b7..67a4ec8768a6 100644
--- a/drivers/media/radio/si470x/radio-si470x-i2c.c
+++ b/drivers/media/radio/si470x/radio-si470x-i2c.c
@@ -482,7 +482,6 @@ static __devexit int si470x_i2c_remove(struct i2c_client *client)
 	cancel_work_sync(&radio->radio_work);
 	video_unregister_device(radio->videodev);
 	kfree(radio);
-	i2c_set_clientdata(client, NULL);
 
 	return 0;
 }
diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c
index b62c0bd3f8ea..e3b9a8ab37f4 100644
--- a/drivers/media/video/mt9m001.c
+++ b/drivers/media/video/mt9m001.c
@@ -785,7 +785,6 @@ static int mt9m001_probe(struct i2c_client *client,
 	ret = mt9m001_video_probe(icd, client);
 	if (ret) {
 		icd->ops = NULL;
-		i2c_set_clientdata(client, NULL);
 		kfree(mt9m001);
 	}
 
@@ -799,7 +798,6 @@ static int mt9m001_remove(struct i2c_client *client)
 
 	icd->ops = NULL;
 	mt9m001_video_remove(icd);
-	i2c_set_clientdata(client, NULL);
 	client->driver = NULL;
 	kfree(mt9m001);
 
diff --git a/drivers/media/video/mt9m111.c b/drivers/media/video/mt9m111.c
index d35f536f9fc3..e42162c50f0a 100644
--- a/drivers/media/video/mt9m111.c
+++ b/drivers/media/video/mt9m111.c
@@ -1068,7 +1068,6 @@ static int mt9m111_probe(struct i2c_client *client,
 	ret = mt9m111_video_probe(icd, client);
 	if (ret) {
 		icd->ops = NULL;
-		i2c_set_clientdata(client, NULL);
 		kfree(mt9m111);
 	}
 
@@ -1081,7 +1080,6 @@ static int mt9m111_remove(struct i2c_client *client)
 	struct soc_camera_device *icd = client->dev.platform_data;
 
 	icd->ops = NULL;
-	i2c_set_clientdata(client, NULL);
 	client->driver = NULL;
 	kfree(mt9m111);
 
diff --git a/drivers/media/video/mt9t031.c b/drivers/media/video/mt9t031.c
index 78b4e091d2d5..9f5ff2547f19 100644
--- a/drivers/media/video/mt9t031.c
+++ b/drivers/media/video/mt9t031.c
@@ -883,7 +883,6 @@ static int mt9t031_probe(struct i2c_client *client,
 	if (ret) {
 		if (icd)
 			icd->ops = NULL;
-		i2c_set_clientdata(client, NULL);
 		kfree(mt9t031);
 	}
 
@@ -897,7 +896,6 @@ static int mt9t031_remove(struct i2c_client *client)
 
 	if (icd)
 		icd->ops = NULL;
-	i2c_set_clientdata(client, NULL);
 	client->driver = NULL;
 	kfree(mt9t031);
 
diff --git a/drivers/media/video/mt9t112.c b/drivers/media/video/mt9t112.c
index 7438f8d775ba..aa4fce95098f 100644
--- a/drivers/media/video/mt9t112.c
+++ b/drivers/media/video/mt9t112.c
@@ -1119,7 +1119,6 @@ static int mt9t112_probe(struct i2c_client *client,
 	ret = mt9t112_camera_probe(icd, client);
 	if (ret) {
 		icd->ops = NULL;
-		i2c_set_clientdata(client, NULL);
 		kfree(priv);
 	}
 
@@ -1132,7 +1131,6 @@ static int mt9t112_remove(struct i2c_client *client)
 	struct soc_camera_device *icd = client->dev.platform_data;
 
 	icd->ops = NULL;
-	i2c_set_clientdata(client, NULL);
 	kfree(priv);
 	return 0;
 }
diff --git a/drivers/media/video/mt9v022.c b/drivers/media/video/mt9v022.c
index e5bae4c9393b..fb44ff006628 100644
--- a/drivers/media/video/mt9v022.c
+++ b/drivers/media/video/mt9v022.c
@@ -920,7 +920,6 @@ static int mt9v022_probe(struct i2c_client *client,
 	ret = mt9v022_video_probe(icd, client);
 	if (ret) {
 		icd->ops = NULL;
-		i2c_set_clientdata(client, NULL);
 		kfree(mt9v022);
 	}
 
@@ -934,7 +933,6 @@ static int mt9v022_remove(struct i2c_client *client)
 
 	icd->ops = NULL;
 	mt9v022_video_remove(icd);
-	i2c_set_clientdata(client, NULL);
 	client->driver = NULL;
 	kfree(mt9v022);
 
diff --git a/drivers/media/video/ov772x.c b/drivers/media/video/ov772x.c
index 7f8ece30c77b..c33acc94b747 100644
--- a/drivers/media/video/ov772x.c
+++ b/drivers/media/video/ov772x.c
@@ -1159,7 +1159,6 @@ static int ov772x_probe(struct i2c_client *client,
 	ret = ov772x_video_probe(icd, client);
 	if (ret) {
 		icd->ops = NULL;
-		i2c_set_clientdata(client, NULL);
 		kfree(priv);
 	}
 
@@ -1172,7 +1171,6 @@ static int ov772x_remove(struct i2c_client *client)
 	struct soc_camera_device *icd = client->dev.platform_data;
 
 	icd->ops = NULL;
-	i2c_set_clientdata(client, NULL);
 	kfree(priv);
 	return 0;
 }
diff --git a/drivers/media/video/ov9640.c b/drivers/media/video/ov9640.c
index 36599a65f548..035e9ecb0c75 100644
--- a/drivers/media/video/ov9640.c
+++ b/drivers/media/video/ov9640.c
@@ -783,7 +783,6 @@ static int ov9640_probe(struct i2c_client *client,
 
 	if (ret) {
 		icd->ops = NULL;
-		i2c_set_clientdata(client, NULL);
 		kfree(priv);
 	}
 
@@ -794,7 +793,6 @@ static int ov9640_remove(struct i2c_client *client)
 {
 	struct ov9640_priv *priv = i2c_get_clientdata(client);
 
-	i2c_set_clientdata(client, NULL);
 	kfree(priv);
 	return 0;
 }
diff --git a/drivers/media/video/rj54n1cb0c.c b/drivers/media/video/rj54n1cb0c.c
index bbd9c11e2c5a..2c3b58c99e18 100644
--- a/drivers/media/video/rj54n1cb0c.c
+++ b/drivers/media/video/rj54n1cb0c.c
@@ -1444,7 +1444,6 @@ static int rj54n1_probe(struct i2c_client *client,
 	ret = rj54n1_video_probe(icd, client, rj54n1_priv);
 	if (ret < 0) {
 		icd->ops = NULL;
-		i2c_set_clientdata(client, NULL);
 		kfree(rj54n1);
 		return ret;
 	}
@@ -1461,7 +1460,6 @@ static int rj54n1_remove(struct i2c_client *client)
 	icd->ops = NULL;
 	if (icl->free_bus)
 		icl->free_bus(icl);
-	i2c_set_clientdata(client, NULL);
 	client->driver = NULL;
 	kfree(rj54n1);
 
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;
 }
diff --git a/drivers/media/video/tw9910.c b/drivers/media/video/tw9910.c
index 76be733eabfd..6eb3395def07 100644
--- a/drivers/media/video/tw9910.c
+++ b/drivers/media/video/tw9910.c
@@ -977,7 +977,6 @@ static int tw9910_probe(struct i2c_client *client,
 	ret = tw9910_video_probe(icd, client);
 	if (ret) {
 		icd->ops = NULL;
-		i2c_set_clientdata(client, NULL);
 		kfree(priv);
 	}
 
@@ -990,7 +989,6 @@ static int tw9910_remove(struct i2c_client *client)
 	struct soc_camera_device *icd = client->dev.platform_data;
 
 	icd->ops = NULL;
-	i2c_set_clientdata(client, NULL);
 	kfree(priv);
 	return 0;
 }