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iio: event: NULL-ify IIO device's event_interface ref during unregister 

Though we know that the iio_device_unregister_eventset() call is followed
by the free-ing of the IIO device object, we should not make this
assumption in the iio_device_unregister_eventset() function. It should
allow for the clean unregistering of the event-set, allowing a re-register
should we decide to implement this at some point later.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20200921103156.194748-2-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
zero-sugar-mainline-defconfig
Alexandru Ardelean 2020-09-21 13:31:56 +03:00 committed by Jonathan Cameron
parent f2f45a5364
commit a3598d14dc
1 changed files with 1 additions and 0 deletions
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drivers/iio/industrialio-event.c
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@ -561,4 +561,5 @@ void iio_device_unregister_eventset(struct iio_dev *indio_dev)
iio_free_chan_devattr_list(&ev_int->dev_attr_list);
kfree(ev_int->group.attrs);
kfree(ev_int);
iio_dev_opaque->event_interface = NULL;
}