build_pollfd() isn't likely to fail, but if it does, pa_sink/source_put() will crash on an assertion failure. I haven't seen such crash happening, this is just something that I noticed while studying the state change code. --- src/modules/alsa/alsa-sink.c | 3 +++ src/modules/alsa/alsa-source.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/src/modules/alsa/alsa-sink.c b/src/modules/alsa/alsa-sink.c index 44f006b1f..5de52d542 100644 --- a/src/modules/alsa/alsa-sink.c +++ b/src/modules/alsa/alsa-sink.c @@ -1203,6 +1203,9 @@ static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offse if (u->sink->thread_info.state == PA_SINK_INIT) { if (build_pollfd(u) < 0) + /* FIXME: This will cause an assertion failure in + * pa_sink_put(), because with the current design + * pa_sink_put() is not allowed to fail. */ return -PA_ERR_IO; } diff --git a/src/modules/alsa/alsa-source.c b/src/modules/alsa/alsa-source.c index 608cb0d63..cdafa580f 100644 --- a/src/modules/alsa/alsa-source.c +++ b/src/modules/alsa/alsa-source.c @@ -1058,6 +1058,9 @@ static int source_process_msg(pa_msgobject *o, int code, void *data, int64_t off if (u->source->thread_info.state == PA_SOURCE_INIT) { if (build_pollfd(u) < 0) + /* FIXME: This will cause an assertion failure in + * pa_source_put(), because with the current design + * pa_source_put() is not allowed to fail. */ return -PA_ERR_IO; } -- 2.15.1