Re: [PATCH] iio: hid-sensors: bind IIO channels alloc to device object

From: Jonathan Cameron
Date: Sat Jul 03 2021 - 13:08:26 EST

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On Wed, 30 Jun 2021 15:30:29 +0300
Alexandru Ardelean <aardelean@xxxxxxxxxxx> wrote:

> 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@xxxxxxxxxxx>

All look good to me, plus it's the same thing already done in hid-sensors-magn-3d
so should be fine :)

Srinivas, if you have time to sanity check that would be great. No huge
rush given we are in the merge window.

Thanks,

Jonathan

> ---
> drivers/iio/accel/hid-sensor-accel-3d.c | 10 ++++------
> drivers/iio/gyro/hid-sensor-gyro-3d.c | 11 ++++-------
> drivers/iio/light/hid-sensor-als.c | 11 ++++-------
> drivers/iio/light/hid-sensor-prox.c | 11 ++++-------
> drivers/iio/orientation/hid-sensor-incl-3d.c | 11 ++++-------
> drivers/iio/pressure/hid-sensor-press.c | 11 ++++-------
> 6 files changed, 24 insertions(+), 41 deletions(-)
>
> diff --git a/drivers/iio/accel/hid-sensor-accel-3d.c b/drivers/iio/accel/hid-sensor-accel-3d.c
> index 55cdca818b3b..a2def6f9380a 100644
> --- a/drivers/iio/accel/hid-sensor-accel-3d.c
> +++ b/drivers/iio/accel/hid-sensor-accel-3d.c
> @@ -367,7 +367,8 @@ static int hid_accel_3d_probe(struct platform_device *pdev)
> dev_err(&pdev->dev, "failed to setup common attributes\n");
> return ret;
> }
> - indio_dev->channels = kmemdup(channel_spec, channel_size, GFP_KERNEL);
> + indio_dev->channels = devm_kmemdup(&pdev->dev, channel_spec,
> + channel_size, GFP_KERNEL);
>
> if (!indio_dev->channels) {
> dev_err(&pdev->dev, "failed to duplicate channels\n");
> @@ -378,7 +379,7 @@ static int hid_accel_3d_probe(struct platform_device *pdev)
> hsdev->usage, accel_state);
> if (ret) {
> dev_err(&pdev->dev, "failed to setup attributes\n");
> - goto error_free_dev_mem;
> + return ret;
> }
>
> indio_dev->info = &accel_3d_info;
> @@ -391,7 +392,7 @@ static int hid_accel_3d_probe(struct platform_device *pdev)
> &accel_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);
> @@ -416,8 +417,6 @@ static int hid_accel_3d_probe(struct platform_device *pdev)
> iio_device_unregister(indio_dev);
> error_remove_trigger:
> hid_sensor_remove_trigger(indio_dev, &accel_state->common_attributes);
> -error_free_dev_mem:
> - kfree(indio_dev->channels);
> return ret;
> }
>
> @@ -431,7 +430,6 @@ static int hid_accel_3d_remove(struct platform_device *pdev)
> sensor_hub_remove_callback(hsdev, hsdev->usage);
> iio_device_unregister(indio_dev);
> hid_sensor_remove_trigger(indio_dev, &accel_state->common_attributes);
> - kfree(indio_dev->channels);
>
> return 0;
> }
> diff --git a/drivers/iio/gyro/hid-sensor-gyro-3d.c b/drivers/iio/gyro/hid-sensor-gyro-3d.c
> index bc63c2a34c5e..8f0ad022c7f1 100644
> --- a/drivers/iio/gyro/hid-sensor-gyro-3d.c
> +++ b/drivers/iio/gyro/hid-sensor-gyro-3d.c
> @@ -303,8 +303,8 @@ static int hid_gyro_3d_probe(struct platform_device *pdev)
> return ret;
> }
>
> - indio_dev->channels = kmemdup(gyro_3d_channels,
> - sizeof(gyro_3d_channels), GFP_KERNEL);
> + indio_dev->channels = devm_kmemdup(&pdev->dev, gyro_3d_channels,
> + sizeof(gyro_3d_channels), GFP_KERNEL);
> if (!indio_dev->channels) {
> dev_err(&pdev->dev, "failed to duplicate channels\n");
> return -ENOMEM;
> @@ -315,7 +315,7 @@ static int hid_gyro_3d_probe(struct platform_device *pdev)
> HID_USAGE_SENSOR_GYRO_3D, gyro_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(gyro_3d_channels);
> @@ -329,7 +329,7 @@ static int hid_gyro_3d_probe(struct platform_device *pdev)
> &gyro_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);
> @@ -354,8 +354,6 @@ static int hid_gyro_3d_probe(struct platform_device *pdev)
> iio_device_unregister(indio_dev);
> error_remove_trigger:
> hid_sensor_remove_trigger(indio_dev, &gyro_state->common_attributes);
> -error_free_dev_mem:
> - kfree(indio_dev->channels);
> return ret;
> }
>
> @@ -369,7 +367,6 @@ static int hid_gyro_3d_remove(struct platform_device *pdev)
> sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D);
> iio_device_unregister(indio_dev);
> hid_sensor_remove_trigger(indio_dev, &gyro_state->common_attributes);
> - kfree(indio_dev->channels);
>
> return 0;
> }
> 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 @@ static int hid_als_probe(struct platform_device *pdev)
> 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 @@ static int hid_prox_probe(struct platform_device *pdev)
> 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;
> }
> diff --git a/drivers/iio/orientation/hid-sensor-incl-3d.c b/drivers/iio/orientation/hid-sensor-incl-3d.c
> index c0079e2c8807..ba5b581d5b25 100644
> --- a/drivers/iio/orientation/hid-sensor-incl-3d.c
> +++ b/drivers/iio/orientation/hid-sensor-incl-3d.c
> @@ -326,8 +326,8 @@ static int hid_incl_3d_probe(struct platform_device *pdev)
> return ret;
> }
>
> - indio_dev->channels = kmemdup(incl_3d_channels,
> - sizeof(incl_3d_channels), GFP_KERNEL);
> + indio_dev->channels = devm_kmemdup(&pdev->dev, incl_3d_channels,
> + sizeof(incl_3d_channels), GFP_KERNEL);
> if (!indio_dev->channels) {
> dev_err(&pdev->dev, "failed to duplicate channels\n");
> return -ENOMEM;
> @@ -339,7 +339,7 @@ static int hid_incl_3d_probe(struct platform_device *pdev)
> incl_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(incl_3d_channels);
> @@ -353,7 +353,7 @@ static int hid_incl_3d_probe(struct platform_device *pdev)
> &incl_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);
> @@ -379,8 +379,6 @@ static int hid_incl_3d_probe(struct platform_device *pdev)
> iio_device_unregister(indio_dev);
> error_remove_trigger:
> hid_sensor_remove_trigger(indio_dev, &incl_state->common_attributes);
> -error_free_dev_mem:
> - kfree(indio_dev->channels);
> return ret;
> }
>
> @@ -394,7 +392,6 @@ static int hid_incl_3d_remove(struct platform_device *pdev)
> sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_INCLINOMETER_3D);
> iio_device_unregister(indio_dev);
> hid_sensor_remove_trigger(indio_dev, &incl_state->common_attributes);
> - kfree(indio_dev->channels);
>
> return 0;
> }
> diff --git a/drivers/iio/pressure/hid-sensor-press.c b/drivers/iio/pressure/hid-sensor-press.c
> index 10c52b8df2ba..dcd593c426b4 100644
> --- a/drivers/iio/pressure/hid-sensor-press.c
> +++ b/drivers/iio/pressure/hid-sensor-press.c
> @@ -259,8 +259,8 @@ static int hid_press_probe(struct platform_device *pdev)
> return ret;
> }
>
> - indio_dev->channels = kmemdup(press_channels, sizeof(press_channels),
> - GFP_KERNEL);
> + indio_dev->channels = devm_kmemdup(&pdev->dev, press_channels,
> + sizeof(press_channels), GFP_KERNEL);
> if (!indio_dev->channels) {
> dev_err(&pdev->dev, "failed to duplicate channels\n");
> return -ENOMEM;
> @@ -271,7 +271,7 @@ static int hid_press_probe(struct platform_device *pdev)
> HID_USAGE_SENSOR_PRESSURE, press_state);
> if (ret) {
> dev_err(&pdev->dev, "failed to setup attributes\n");
> - goto error_free_dev_mem;
> + return ret;
> }
>
> indio_dev->num_channels =
> @@ -286,7 +286,7 @@ static int hid_press_probe(struct platform_device *pdev)
> &press_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);
> @@ -311,8 +311,6 @@ static int hid_press_probe(struct platform_device *pdev)
> iio_device_unregister(indio_dev);
> error_remove_trigger:
> hid_sensor_remove_trigger(indio_dev, &press_state->common_attributes);
> -error_free_dev_mem:
> - kfree(indio_dev->channels);
> return ret;
> }
>
> @@ -326,7 +324,6 @@ static int hid_press_remove(struct platform_device *pdev)
> sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_PRESSURE);
> iio_device_unregister(indio_dev);
> hid_sensor_remove_trigger(indio_dev, &press_state->common_attributes);
> - kfree(indio_dev->channels);
>
> return 0;
> }

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