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sink,source: Avoid crash by not updating volume on shutdown

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Sometimes the ALSA mixer can be modified during a point at shutdown
which causes a race condition trying to update the volume of an
unlinked sink.

Includes typo fix by our Chief Typo Spotter, Colin, and a clarifying
comment by me.

BugLink: http://bugs.launchpad.net/bugs/841968
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
This commit is contained in:
David Henningsson 2011-09-12 12:57:20 +02:00 • committed by Arun Raghavan
parent 38be4a2d44
commit f8624a7876
4 changed files with 14 additions and 0 deletions
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4
src/pulsecore/sink.c
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@ -2623,6 +2623,10 @@ int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offse
/* This message is sent from IO-thread and handled in main thread. */
pa_assert_ctl_context();
/* Make sure we're not messing with main thread when no longer linked */
if (!PA_SINK_IS_LINKED(s->state))
return 0;
pa_sink_get_volume(s, TRUE);
pa_sink_get_mute(s, TRUE);
return 0;