mixer/alsa: handle ENODEV

Fixes busy loop when USB sound device gets unplugged (Mantis bug #3824).

mixer/alsa: handle ENODEV
9a107625 · Max Kellermann · 72ef38d4 · 9a107625 · 9a107625
Commit 9a107625 authored Oct 01, 2013 by Max Kellermann
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NEWS NEWS +2 -0

alsa_mixer_plugin.c src/mixer/alsa_mixer_plugin.c +5 -0

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--- a/NEWS
+++ b/NEWS
 ver 0.17.6 (not yet released)
+* mixer:
+  - alsa: fix busy loop when USB sound device gets unplugged

 ver 0.17.5 (2013/08/04)
 * protocol:

--- a/src/mixer/alsa_mixer_plugin.c
+++ b/src/mixer/alsa_mixer_plugin.c
@@ -182,6 +182,11 @@ alsa_mixer_source_dispatch(GSource *_source,
 	if (err < 0) {
 		g_warning("snd_mixer_handle_events() failed: %s",
 			  snd_strerror(err));
+
+		if (err == -ENODEV)
+			/* the sound device was unplugged; disable
+			   this GSource */
+			return false;
 	}

 	return true;