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SubjectRe: [PATCH] iio: hid-sensors: bind IIO channels alloc to device object
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On Wed, 2021-06-30 at 15:30 +0300, Alexandru Ardelean 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@deviqon.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>

> ---
>  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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