staging: iio: core: Avoid NULL pointer de-ref in case indio_dev->setup_ops are not in use
Drivers may not need setup_ops at all, so let the core supply
some empty ops.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c
index 868e366..27695df 100644
--- a/drivers/staging/iio/industrialio-core.c
+++ b/drivers/staging/iio/industrialio-core.c
@@ -854,6 +854,8 @@
.compat_ioctl = iio_ioctl,
};
+static const struct iio_buffer_setup_ops noop_ring_setup_ops;
+
int iio_device_register(struct iio_dev *indio_dev)
{
int ret;
@@ -882,6 +884,10 @@
if (indio_dev->modes & INDIO_BUFFER_TRIGGERED)
iio_device_register_trigger_consumer(indio_dev);
+ if ((indio_dev->modes & INDIO_ALL_BUFFER_MODES) &&
+ indio_dev->setup_ops == NULL)
+ indio_dev->setup_ops = &noop_ring_setup_ops;
+
ret = device_add(&indio_dev->dev);
if (ret < 0)
goto error_unreg_eventset;