bluetooth: Support transport auto-release

With BlueZ 5, if the remote device suspends the audio, the transport
state will change to "idle" and the endpoint is not required to release
the transport, since this could introduce race conditions. Therefore,
ignore the call to pa_bluetooth_transport_release() if the transport is
not acquired any more.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/modules/bluetooth/bluetooth-util.c b/src/modules/bluetooth/bluetooth-util.c
index 2e794ac3c..59247364c 100644
--- a/src/modules/bluetooth/bluetooth-util.c
+++ b/src/modules/bluetooth/bluetooth-util.c
@@ -1538,6 +1538,12 @@ void pa_bluetooth_transport_release(pa_bluetooth_transport *t) {
         pa_assert_se(dbus_message_append_args(m, DBUS_TYPE_STRING, &accesstype, DBUS_TYPE_INVALID));
     } else {
         pa_assert(t->device->discovery->version == BLUEZ_VERSION_5);
+
+        if (t->state <= PA_BLUETOOTH_TRANSPORT_STATE_IDLE) {
+            pa_log_info("Transport %s auto-released by BlueZ or already released", t->path);
+            return;
+        }
+
         pa_assert_se(m = dbus_message_new_method_call(t->owner, t->path, "org.bluez.MediaTransport1", "Release"));
     }