[Qemu-devel] [PATCH] audio: make audio poll timer deterministic

[Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>]

This patch changes resetting strategy of the audio polling timer.
It does not change expiration time if the timer is already set.

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
---
 audio/audio.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/audio/audio.c b/audio/audio.c
index c845a44..1ee95a5 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -1112,8 +1112,10 @@ static int audio_is_timer_needed (void)
 static void audio_reset_timer (AudioState *s)
 {
     if (audio_is_timer_needed ()) {
-        timer_mod (s->ts,
-            qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + conf.period.ticks);
+        if (!timer_pending(s->ts)) {
+            timer_mod (s->ts,
+                qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + conf.period.ticks);
+        }
     }
     else {
         timer_del (s->ts);