From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Tue, 2 Jul 2013 00:55:44 +0000 (+1000)
Subject: If we don't have anything to sync, don't add a EV_SYN event
X-Git-Tag: libevdev-0.2~28
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2ba194f51b8aae44ba6ee8d0f157bcceae82c729;p=platform%2Fupstream%2Flibevdev.git

If we don't have anything to sync, don't add a EV_SYN event

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

diff --git a/libevdev/libevdev.c b/libevdev/libevdev.c
index 445cc54..8d339f4 100644
--- a/libevdev/libevdev.c
+++ b/libevdev/libevdev.c
@@ -426,11 +426,14 @@ sync_state(struct libevdev *dev)
 	if (rc == 0 && libevdev_has_event_code(dev, EV_ABS, ABS_MT_SLOT))
 		rc = sync_mt_state(dev);
 
-	ev = queue_push(dev);
-	init_event(dev, ev, EV_SYN, SYN_REPORT, 0);
-
 	dev->queue_nsync = queue_num_elements(dev);
 
+	if (dev->queue_nsync > 0) {
+		ev = queue_push(dev);
+		init_event(dev, ev, EV_SYN, SYN_REPORT, 0);
+		dev->queue_nsync++;
+	}
+
 	return rc;
 }