input: don't queue delay if paused

qemu_input_event_send() discards key event when the guest is paused,
but not the delay.

The delay ends up in the input queue, and qemu_input_event_send_key()
will further fill the queue with upcoming events.

VNC uses qemu_input_event_send_key_delay(), not SPICE, which results
in a different input behaviour on pause: VNC will queue the events
(except the first that is discarded), SPICE will discard all events.

Don't queue delay if paused, and provide same behaviour on SPICE and
VNC clients on resume (and potentially avoid over-allocating the
buffer queue)

Fixes:
https://bugzilla.redhat.com/show_bug.cgi?id=1444326

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20170425130520.31819-1-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

diff --git a/ui/input.c b/ui/input.c
index fb1f404095ba6e29aa4c08704c4d613b8edc242a..830f912f99f33c63ca9cb7cff68b16cae3623e17 100644 (file)
--- a/ui/input.c
+++ b/ui/input.c
@@ -411,6 +411,10 @@ void qemu_input_event_send_key_qcode(QemuConsole *src, QKeyCode q, bool down)
 
 void qemu_input_event_send_key_delay(uint32_t delay_ms)
 {
+    if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
+        return;
+    }
+
     if (!kbd_timer) {
         kbd_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, qemu_input_queue_process,
                                  &kbd_queue);