sound: do not modify client state on migration

During migration, a volume jump is observed by the client. This is due
to qemu setting up destination server with default sound state, and the
server sending it after the client is connected. The volume is later
restored after migration is finished so there is no need to send this
default state values on connection.

Tested with both AC97 & HDA devices.

Fixes:
https://bugzilla.redhat.com/show_bug.cgi?id=1012868

1 files changed, 4 insertions, 1 deletions

diff --git a/server/snd_worker.c b/server/snd_worker.c
index a1223b47..4d404e0c 100644
--- a/server/snd_worker.c
+++ b/server/snd_worker.c
@@ -1232,7 +1232,10 @@ static void snd_set_playback_peer(RedChannel *channel, RedClient *client, RedsSt
         }
     }
 
-    on_new_playback_channel(worker);
+    if (!red_client_during_migrate_at_target(client)) {
+        on_new_playback_channel(worker);
+    }
+
     if (worker->active) {
         spice_server_playback_start(st->sin);
     }