From: Jaroslav Kysela <perex@perex.cz>
Date: Tue, 31 Aug 2021 07:25:12 +0000 (+0200)
Subject: ucm: avoid zero card instance number
X-Git-Tag: v1.2.6~32
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=7d40a76ef5494e08af00fa4e7bfefbd43aba4827;p=alsa-lib.git

ucm: avoid zero card instance number

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---

diff --git a/src/ucm/utils.c b/src/ucm/utils.c
index f3a8c9ba..10b21c34 100644
--- a/src/ucm/utils.c
+++ b/src/ucm/utils.c
@@ -780,6 +780,9 @@ int uc_mgr_card_open(snd_use_case_mgr_t *uc_mgr)
 	while (uc_mgr_card_find(ucm_card_assign)) {
 		ucm_card_assign++;
 		ucm_card_assign &= 0xffff;
+		/* avoid zero card instance number */
+		if (ucm_card_assign == 0)
+			ucm_card_assign++;
 		if (ucm_card_assign == prev) {
 			pthread_mutex_unlock(&ucm_cards_mutex);
 			return -ENOMEM;