On Wed, 2 Oct 2019 10:57:57 +0200 Bartosz Golaszewski <b...@bgdev.pl> wrote:
> From: Bartosz Golaszewski <bgolaszew...@baylibre.com> > > We can use the managed variant of iio_device_register() and remove > the corresponding unregister operation from the remove callback. > > Signed-off-by: Bartosz Golaszewski <bgolaszew...@baylibre.com> This results in a race where the regulators are powered down before we remove the userspace interfaces. All sorts of fun can therefore occur... If we fix that with some devm_add_action_or_reset fun then there is still the fact that we loose the 'obviously correct' property of the remove being a mirror of the probe because the ordering wrt to runtime_pm is different. So I'd leave this one alone. Thanks, Jonathan > --- > drivers/iio/pressure/bmp280-core.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/iio/pressure/bmp280-core.c > b/drivers/iio/pressure/bmp280-core.c > index c21f8ce7b09c..f22400e1e98f 100644 > --- a/drivers/iio/pressure/bmp280-core.c > +++ b/drivers/iio/pressure/bmp280-core.c > @@ -1127,7 +1127,7 @@ int bmp280_common_probe(struct device *dev, > pm_runtime_use_autosuspend(dev); > pm_runtime_put(dev); > > - ret = iio_device_register(indio_dev); > + ret = devm_iio_device_register(dev, indio_dev); > if (ret) > goto out_runtime_pm_disable; > > @@ -1149,7 +1149,6 @@ int bmp280_common_remove(struct device *dev) > struct iio_dev *indio_dev = dev_get_drvdata(dev); > struct bmp280_data *data = iio_priv(indio_dev); > > - iio_device_unregister(indio_dev); > pm_runtime_get_sync(data->dev); > pm_runtime_put_noidle(data->dev); > pm_runtime_disable(data->dev);
