From 1e69dbe01e1cad1680723e1bc086cc52a1772c17 Mon Sep 17 00:00:00 2001
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Date: Wed, 11 Aug 2021 08:40:38 -0400
Subject: [PATCH 27/39] audio: Never send migration section
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RH-Author: Miroslav Rezanina <mrezanin@redhat.com>
RH-MergeRequest: 35: Synchronize with RHEL-AV 8.5 release 28 to RHEL 9
RH-Commit: [4/4] 0b6ec114a3573ac7efcbe5ab3094d8020899c82d (mrezanin/centos-src-qemu-kvm)
RH-Bugzilla: 1957194
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>

The audio migration vmstate is empty, and always has been; we can't
just remove it though because an old qemu might send it us.
Changes with -audiodev now mean it's sometimes created when it didn't
used to be, and can confuse migration to old qemu.

Change it so that vmstate_audio is never sent; if it's received it
should still be accepted, and old qemu's shouldn't be too upset if it's
missing.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Tested-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210809170956.78536-1-dgilbert@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit da77adbaf619c4d170cb42d769145ad1803fbad9)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 audio/audio.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/audio/audio.c b/audio/audio.c
index 534278edfe..fa724ea8e0 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -1621,10 +1621,20 @@ void audio_cleanup(void)
     }
 }
 
+static bool vmstate_audio_needed(void *opaque)
+{
+    /*
+     * Never needed, this vmstate only exists in case
+     * an old qemu sends it to us.
+     */
+    return false;
+}
+
 static const VMStateDescription vmstate_audio = {
     .name = "audio",
     .version_id = 1,
     .minimum_version_id = 1,
+    .needed = vmstate_audio_needed,
     .fields = (VMStateField[]) {
         VMSTATE_END_OF_LIST()
     }
-- 
2.27.0