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SubjectRe: [PATCH] iio: hid-sensors: bind IIO channels alloc to device object
On Tue, 13 Jul 2021 09:29:55 -0700
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> wrote:

> 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>

Applied to the togreg branch of iio.git which will go through the usual
initial exposure as testing before I push it out for linux-next to pick up.

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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