X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fiio%2Findustrialio-event.c;h=90fac8ec63c9662e2b1603f7ece427a606a704ae;hb=3477d168ba61c5b0ca42d3d4642f3463609a5417;hp=0ebfc923a9975a39326b38049f93cd3dfd1c0601;hpb=f44dd184634d401f5cf88a6d8b4a60d5ff4f417f;p=karo-tx-linux.git

diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index 0ebfc923a997..90fac8ec63c9 100644
--- a/drivers/iio/industrialio-event.c
+++ b/drivers/iio/industrialio-event.c
@@ -57,6 +57,11 @@ bool iio_event_enabled(const struct iio_event_interface *ev_int)
  *
  * Note: The caller must make sure that this function is not running
  * concurrently for the same indio_dev more than once.
+ *
+ * This function may be safely used as soon as a valid reference to iio_dev has
+ * been obtained via iio_device_alloc(), but any events that are submitted
+ * before iio_device_register() has successfully completed will be silently
+ * discarded.
  **/
 int iio_push_event(struct iio_dev *indio_dev, u64 ev_code, s64 timestamp)
 {
@@ -64,6 +69,9 @@ int iio_push_event(struct iio_dev *indio_dev, u64 ev_code, s64 timestamp)
 	struct iio_event_data ev;
 	int copied;
 
+	if (!ev_int)
+		return 0;
+
 	/* Does anyone care? */
 	if (iio_event_enabled(ev_int)) {