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authorMark Farrugia <mark.farrugia@fiberdyne.com.au>2019-04-03 17:41:32 +1100
committerMark Farrugia <mark.farrugia@fiberdyne.com.au>2019-04-08 13:57:54 +1000
commit8e151019a32b733420e2eb3006a5edaac5bc9589 (patch)
tree0117c22646a7d880b71b1908957a00a347fdf020 /loopback/loopback.c
parent16912fcce2802752ba11b884d920c71cae5eb1c9 (diff)
Introduce 'unconfigure' callback
The 'unconfigure' callback can be used to clean up the 'configured' state of an Audio Path, for when it is desired to reset the streams, and/or reload a different stream configuration. To destroy the streams, we must attempt to force their PCMs closed. Take note though, that if a PCM is being written to when an unconfigure command is issued, system instability may occur. Signed-off-by: Mark Farrugia <mark.farrugia@fiberdyne.com.au>
Diffstat (limited to 'loopback/loopback.c')
-rw-r--r--loopback/loopback.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/loopback/loopback.c b/loopback/loopback.c
index de0f38a..49c188d 100644
--- a/loopback/loopback.c
+++ b/loopback/loopback.c
@@ -1080,6 +1080,14 @@ static int loopbackap_configure(struct snd_card *card,
return 0;
}
+static int loopbackap_unconfigure(void)
+{
+ mutex_destroy(&loopback->cable_lock);
+ kfree(loopback);
+
+ return 0;
+}
+
/*******************************************************************************
* Loopback Audio Path AVIRT registration
******************************************************************************/
@@ -1091,6 +1099,7 @@ static struct snd_avirt_audiopath loopbackap_module = {
.pcm_playback_ops = &loopbackap_pcm_ops,
.pcm_capture_ops = &loopbackap_pcm_ops,
.configure = loopbackap_configure,
+ .unconfigure = loopbackap_unconfigure,
};
static int __init alsa_card_loopback_init(void)
@@ -1108,6 +1117,8 @@ static int __init alsa_card_loopback_init(void)
static void __exit alsa_card_loopback_exit(void)
{
+ mutex_destroy(&loopback->cable_lock);
+ kfree(loopback);
snd_avirt_audiopath_deregister(&loopbackap_module);
}