[libvirt] [PULL 2/2] audio: omitting audiodev= parameter is only deprecated

[Gerd Hoffmann]

From: Kővágó, Zoltán <dirty.ice.hu at gmail.com>

Unfortunately, changes introduced in af2041ed2d "audio: audiodev=
parameters no longer optional when -audiodev present" breaks backward
compatibility.  This patch changes the error into a deprecation warning.

Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu at gmail.com>
Message-id: 02d4328c33455742d01e0b62395013e95293c3ba.1566847960.git.DirtY.iCE.hu at gmail.com
Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>
---
 audio/audio.c        | 8 ++++----
 qemu-deprecated.texi | 7 +++++++
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/audio/audio.c b/audio/audio.c
index ae335dbebb1e..e99fcd0694e9 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -1412,8 +1412,9 @@ static AudioState *audio_init(Audiodev *dev, const char *name)
         drvname = AudiodevDriver_str(dev->driver);
     } else if (!QTAILQ_EMPTY(&audio_states)) {
         if (!legacy_config) {
-            dolog("You must specify an audiodev= for the device %s\n", name);
-            exit(1);
+            dolog("Device %s: audiodev default parameter is deprecated, please "
+                  "specify audiodev=%s\n", name,
+                  QTAILQ_FIRST(&audio_states)->dev->id);
         }
         return QTAILQ_FIRST(&audio_states);
     } else {
@@ -1548,8 +1549,7 @@ CaptureVoiceOut *AUD_add_capture(
 
     if (!s) {
         if (!legacy_config) {
-            dolog("You must specify audiodev when trying to capture\n");
-            return NULL;
+            dolog("Capturing without setting an audiodev is deprecated\n");
         }
         s = audio_init(NULL, NULL);
     }
diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi
index 00a4b6f35042..9d74a1cfc017 100644
--- a/qemu-deprecated.texi
+++ b/qemu-deprecated.texi
@@ -72,6 +72,13 @@ backend settings instead of environment variables.  To ease migration to
 the new format, the ``-audiodev-help'' option can be used to convert
 the current values of the environment variables to ``-audiodev'' options.
 
+ at subsection Creating sound card devices and vnc without audiodev= property (since 4.2)
+
+When not using the deprecated legacy audio config, each sound card
+should specify an @code{audiodev=} property.  Additionally, when using
+vnc, you should specify an @code{audiodev=} propery if you plan to
+transmit audio through the VNC protocol.
+
 @subsection -mon ...,control=readline,pretty=on|off (since 4.1)
 
 The @code{pretty=on|off} switch has no effect for HMP monitors, but is
-- 
2.18.1