On 10/26/11 13:01, Lars-Peter Clausen wrote: > Some devices have fixed thresholds which can not be modified so make the > write_event_value callback optional, so the drivers for these devices do not > have to implement a boilerplate no-op callback. > > Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx> Acked-by: Jonathan Cameron <jic23@xxxxxxxxx> > --- > drivers/staging/iio/industrialio-core.c | 3 +++ > 1 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c > index cfa4fcb..d2eea07 100644 > --- a/drivers/staging/iio/industrialio-core.c > +++ b/drivers/staging/iio/industrialio-core.c > @@ -782,6 +782,9 @@ static ssize_t iio_ev_value_store(struct device *dev, > unsigned long val; > int ret; > > + if (!indio_dev->info->write_event_value) > + return -EINVAL; > + > ret = strict_strtoul(buf, 10, &val); > if (ret) > return ret; -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
