[PATCH] device-manager: Don't try to use unlinked devices

[tanu.kaskinen@xxxxxxxxxxxxxxx (Tanu Kaskinen)]

This fixes an assertion crash:

[pulseaudio] source.c: Assertion 'PA_SOURCE_IS_LINKED(s->state)' failed at pulsecore/source.c:734, function pa_source_update_status(). Aborting.

The crash happened when a Bluetooth headset profile was changed from
a2dp to hsp. During the profile change three devices are created:
a sink, a monitor source for the sink, and a regular source. First
pa_sink/source_new() are called for each device, and that puts the
devices to u->core->sinks/sources. Then, pa_sink_put() is called for
the sink, and that in turn calls pa_source_put() for the source. At
that point module-device-manager decides to reroute all source
outputs. The non-monitor source that the Bluetooth card created hasn't
been linked yet at this stage, because it will only be linked after
the sink and the monitor source have been linked. So,
module-device-manager should take into account during the rerouting
that not all sinks and sources are necessarily linked. This patch does
that.

Reported-By: Iskren Hadzhinedev <i.hadzhinedev at gmail.com>
---
NOTE: I have not yet tested that this patch actually works.

 src/modules/module-device-manager.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/modules/module-device-manager.c b/src/modules/module-device-manager.c
index 9df3d8e..d86c158 100644
--- a/src/modules/module-device-manager.c
+++ b/src/modules/module-device-manager.c
@@ -605,6 +605,8 @@ static void update_highest_priority_device_indexes(struct userdata *u, const cha
                             PA_IDXSET_FOREACH(sink, u->core->sinks, idx) {
                                 if ((pa_sink*) ignore_device == sink)
                                     continue;
+                                if (!PA_SINK_IS_LINKED(sink->state))
+                                    continue;
                                 if (pa_streq(sink->name, device_name)) {
                                     found = true;
                                     idx = sink->index; /* Is this needed? */
@@ -617,6 +619,8 @@ static void update_highest_priority_device_indexes(struct userdata *u, const cha
                             PA_IDXSET_FOREACH(source, u->core->sources, idx) {
                                 if ((pa_source*) ignore_device == source)
                                     continue;
+                                if (!PA_SOURCE_IS_LINKED(source->state))
+                                    continue;
                                 if (pa_streq(source->name, device_name)) {
                                     found = true;
                                     idx = source->index; /* Is this needed? */
-- 
1.8.3.1