iio: hid-sensors: bind IIO channels alloc to device object

Some HID drivers use devm_kmemdup() already to clone the template IIO
channels information and update it.
However, there are still some drivers that kmemdup() and kfree() the
channels.

This change converts them to use devm_kmemdup() and bind the life-time of
this allocated object to the parent device object (in these drivers).

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20210630123029.759609-1-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

2 files changed, 8 insertions, 14 deletions

diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
index 2ff252c75c03..5a1a625d8d16 100644
--- a/drivers/iio/light/hid-sensor-als.c
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -294,8 +294,8 @@ static int hid_als_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	indio_dev->channels = kmemdup(als_channels,
-				      sizeof(als_channels), GFP_KERNEL);
+	indio_dev->channels = devm_kmemdup(&pdev->dev, als_channels,
+					   sizeof(als_channels), GFP_KERNEL);
 	if (!indio_dev->channels) {
 		dev_err(&pdev->dev, "failed to duplicate channels\n");
 		return -ENOMEM;
@@ -306,7 +306,7 @@ static int hid_als_probe(struct platform_device *pdev)
 			       HID_USAGE_SENSOR_ALS, als_state);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to setup attributes\n");
-		goto error_free_dev_mem;
+		return ret;
 	}
 
 	indio_dev->num_channels =
@@ -321,7 +321,7 @@ static int hid_als_probe(struct platform_device *pdev)
 				&als_state->common_attributes);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "trigger setup failed\n");
-		goto error_free_dev_mem;
+		return ret;
 	}
 
 	ret = iio_device_register(indio_dev);
@@ -346,8 +346,6 @@ error_iio_unreg:
 	iio_device_unregister(indio_dev);
 error_remove_trigger:
 	hid_sensor_remove_trigger(indio_dev, &als_state->common_attributes);
-error_free_dev_mem:
-	kfree(indio_dev->channels);
 	return ret;
 }
 
@@ -361,7 +359,6 @@ static int hid_als_remove(struct platform_device *pdev)
 	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ALS);
 	iio_device_unregister(indio_dev);
 	hid_sensor_remove_trigger(indio_dev, &als_state->common_attributes);
-	kfree(indio_dev->channels);
 
 	return 0;
 }
diff --git a/drivers/iio/light/hid-sensor-prox.c b/drivers/iio/light/hid-sensor-prox.c
index 1621530f5f61..f10fa2abfe72 100644
--- a/drivers/iio/light/hid-sensor-prox.c
+++ b/drivers/iio/light/hid-sensor-prox.c
@@ -253,8 +253,8 @@ static int hid_prox_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	indio_dev->channels = kmemdup(prox_channels, sizeof(prox_channels),
-				      GFP_KERNEL);
+	indio_dev->channels = devm_kmemdup(&pdev->dev, prox_channels,
+					   sizeof(prox_channels), GFP_KERNEL);
 	if (!indio_dev->channels) {
 		dev_err(&pdev->dev, "failed to duplicate channels\n");
 		return -ENOMEM;
@@ -265,7 +265,7 @@ static int hid_prox_probe(struct platform_device *pdev)
 				HID_USAGE_SENSOR_PROX, prox_state);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to setup attributes\n");
-		goto error_free_dev_mem;
+		return ret;
 	}
 
 	indio_dev->num_channels = ARRAY_SIZE(prox_channels);
@@ -279,7 +279,7 @@ static int hid_prox_probe(struct platform_device *pdev)
 				&prox_state->common_attributes);
 	if (ret) {
 		dev_err(&pdev->dev, "trigger setup failed\n");
-		goto error_free_dev_mem;
+		return ret;
 	}
 
 	ret = iio_device_register(indio_dev);
@@ -304,8 +304,6 @@ error_iio_unreg:
 	iio_device_unregister(indio_dev);
 error_remove_trigger:
 	hid_sensor_remove_trigger(indio_dev, &prox_state->common_attributes);
-error_free_dev_mem:
-	kfree(indio_dev->channels);
 	return ret;
 }
 
@@ -319,7 +317,6 @@ static int hid_prox_remove(struct platform_device *pdev)
 	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_PROX);
 	iio_device_unregister(indio_dev);
 	hid_sensor_remove_trigger(indio_dev, &prox_state->common_attributes);
-	kfree(indio_dev->channels);
 
 	return 0;
 }