File a99ed152-no-volume-sync-without-audio.patch of Package spice-gtk.1699

From a99ed1524b075c0cd9e7d82e7877783a1e31d291 Mon Sep 17 00:00:00 2001
From: Victor Toso <victortoso@redhat.com>
Date: Mon, 7 Sep 2015 10:17:34 +0200
Subject: [PATCH] audio: Do not volume-sync without audio

In case audio backend is not initialized correctly or there isn't audio
in the VM, we should not try to volume-sync.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1257210
---
 src/channel-main.c |    6 ++++--
 src/spice-audio.c  |    4 ++++
 2 files changed, 8 insertions(+), 2 deletions(-)

--- a/src/channel-main.c
+++ b/src/channel-main.c
@@ -1151,7 +1151,8 @@ static void agent_sync_audio_playback(Sp
     SpiceAudio *audio = spice_audio_get(session, NULL);
     SpiceMainChannelPrivate *c = main_channel->priv;
 
-    if (!test_agent_cap(main_channel, VD_AGENT_CAP_AUDIO_VOLUME_SYNC) ||
+    if (audio == NULL ||
+        !test_agent_cap(main_channel, VD_AGENT_CAP_AUDIO_VOLUME_SYNC) ||
         c->agent_volume_playback_sync == TRUE) {
         SPICE_DEBUG("%s - is not going to sync audio with guest", __func__);
         return;
@@ -1207,7 +1208,8 @@ static void agent_sync_audio_record(Spic
     SpiceAudio *audio = spice_audio_get(session, NULL);
     SpiceMainChannelPrivate *c = main_channel->priv;
 
-    if (!test_agent_cap(main_channel, VD_AGENT_CAP_AUDIO_VOLUME_SYNC) ||
+    if (audio == NULL ||
+        !test_agent_cap(main_channel, VD_AGENT_CAP_AUDIO_VOLUME_SYNC) ||
         c->agent_volume_record_sync == TRUE) {
         SPICE_DEBUG("%s - is not going to sync audio with guest", __func__);
         return;
--- a/src/spice-audio.c
+++ b/src/spice-audio.c
@@ -197,6 +197,7 @@ void spice_audio_get_playback_volume_inf
                                                 GAsyncReadyCallback callback,
                                                 gpointer user_data)
 {
+    g_return_if_fail(audio != NULL);
     SPICE_AUDIO_GET_CLASS(audio)->get_playback_volume_info_async(audio,
             cancellable, main_channel, callback, user_data);
 }
@@ -208,6 +209,7 @@ gboolean spice_audio_get_playback_volume
                                                      guint16 **volume,
                                                      GError **error)
 {
+    g_return_val_if_fail(audio != NULL, FALSE);
     return SPICE_AUDIO_GET_CLASS(audio)->get_playback_volume_info_finish(audio,
             res, mute, nchannels, volume, error);
 }
@@ -218,6 +220,7 @@ void spice_audio_get_record_volume_info_
                                               GAsyncReadyCallback callback,
                                               gpointer user_data)
 {
+    g_return_if_fail(audio != NULL);
     SPICE_AUDIO_GET_CLASS(audio)->get_record_volume_info_async(audio,
             cancellable, main_channel, callback, user_data);
 }
@@ -229,6 +232,7 @@ gboolean spice_audio_get_record_volume_i
                                                    guint16 **volume,
                                                    GError **error)
 {
+    g_return_val_if_fail(audio != NULL, FALSE);
     return SPICE_AUDIO_GET_CLASS(audio)->get_record_volume_info_finish(audio,
             res, mute, nchannels, volume, error);
 }