From: David Henningsson <david.henningsson@canonical.com>
Date: Tue, 18 Mar 2014 22:07:19 +0000 (+0100)
Subject: route: Return NULL in case of zero found channels in determine_chmap
X-Git-Tag: v1.0.28~17
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=d794af65e97822a29945a21c1cd2a21ea3b8e6b8;p=alsa-lib.git

route: Return NULL in case of zero found channels in determine_chmap

This should fix the problem where the old route syntax can no longer
be opened.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/src/pcm/pcm_route.c b/src/pcm/pcm_route.c
index ac11bdc8..a9097caa 100644
--- a/src/pcm/pcm_route.c
+++ b/src/pcm/pcm_route.c
@@ -883,7 +883,10 @@ static int determine_chmap(snd_config_t *tt, snd_pcm_chmap_t **tt_chmap)
 		}
 	}
 
-
+	if (chmap->channels == 0) {
+		free(chmap);
+		chmap = NULL;
+	}
 	*tt_chmap = chmap;
 	return 0;