From 37a49a5992c6bc3667dcc18304af0b741127f909 Mon Sep 17 00:00:00 2001
From: Tilghman Lesher <tilghman@meg.abyt.es>
Date: Wed, 21 Dec 2005 20:01:16 +0000
Subject: [PATCH] Allow a chan_alsa that failed to open sound devices to be
 unloaded.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@7582 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 channels/chan_alsa.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/channels/chan_alsa.c b/channels/chan_alsa.c
index 9bef8f3c72..6f0d36070a 100644
--- a/channels/chan_alsa.c
+++ b/channels/chan_alsa.c
@@ -1109,8 +1109,10 @@ int unload_module()
 	ast_channel_unregister(&alsa_tech);
 	for (x=0;x<sizeof(myclis)/sizeof(struct ast_cli_entry); x++)
 		ast_cli_unregister(myclis + x);
-	snd_pcm_close(alsa.icard);
-	snd_pcm_close(alsa.ocard);
+	if (alsa.icard)
+		snd_pcm_close(alsa.icard);
+	if (alsa.ocard)
+		snd_pcm_close(alsa.ocard);
 	if (sndcmd[0] > 0) {
 		close(sndcmd[0]);
 		close(sndcmd[1]);