On 12/07, David Lechner wrote: > On Thu, Dec 7, 2023 at 12:38 PM Marcelo Schmitt > <marcelo.schmitt@xxxxxxxxxx> wrote: > > > > Set device driver data so it can be retrieved when handling alert > > events, avoiding null pointer dereference. > > [...] > > Instead of introducing a new relationship between iio_dev and st, why > not pass iio_dev to devm_request_threaded_irq() instead of st and then > use iio_priv() to get st in ad7091r_event_handler? > > diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c > index 8e252cde735b..0e5d3d2e9c98 100644 > --- a/drivers/iio/adc/ad7091r-base.c > +++ b/drivers/iio/adc/ad7091r-base.c > @@ -174,8 +174,8 @@ static const struct iio_info ad7091r_info = { > > static irqreturn_t ad7091r_event_handler(int irq, void *private) > { > - struct ad7091r_state *st = (struct ad7091r_state *) private; > - struct iio_dev *iio_dev = dev_get_drvdata(st->dev); > + struct iio_dev *iio_dev = private; > + struct ad7091r_state *st = iio_priv(iio_dev); > unsigned int i, read_val; > int ret; > s64 timestamp = iio_get_time_ns(iio_dev); > @@ -234,7 +234,7 @@ int ad7091r_probe(struct device *dev, const char *name, > if (irq) { > ret = devm_request_threaded_irq(dev, irq, NULL, > ad7091r_event_handler, > - IRQF_TRIGGER_FALLING | IRQF_ONESHOT, name, st); > + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, name, iio_dev); > if (ret) > return ret; > } Looks good, will do for v4. Thanks