Don't return the next element if the queue is full

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

diff --git a/libevdev/libevdev-int.h b/libevdev/libevdev-int.h
index 911dc40..43cfe8a 100644 (file)
--- a/libevdev/libevdev-int.h
+++ b/libevdev/libevdev-int.h
@@ -214,6 +214,9 @@ queue_num_free_elements(struct libevdev *dev)
 static inline struct input_event *
 queue_next_element(struct libevdev *dev)
 {
+       if (dev->queue_next == dev->queue_size)
+               return NULL;
+
        return &dev->queue[dev->queue_next];
 }