[RFC PATCH 1/1] iio: buffer: Sanity check buffer callback

["Nuno Sá" <nuno.sa@analog.com>]

Make sure that a callback is actually present before trying to call
it...

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/iio/buffer/industrialio-buffer-cb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/iio/buffer/industrialio-buffer-cb.c b/drivers/iio/buffer/industrialio-buffer-cb.c
index 47c96f7f4976..b4385f59399d 100644
--- a/drivers/iio/buffer/industrialio-buffer-cb.c
+++ b/drivers/iio/buffer/industrialio-buffer-cb.c
@@ -27,6 +27,10 @@ static struct iio_cb_buffer *buffer_to_cb_buffer(struct iio_buffer *buffer)
 static int iio_buffer_cb_store_to(struct iio_buffer *buffer, const void *data)
 {
 	struct iio_cb_buffer *cb_buff = buffer_to_cb_buffer(buffer);
+
+	if (!cb_buff->cb)
+		return 0;
+
 	return cb_buff->cb(data, cb_buff->private);
 }
 
-- 
2.29.2