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ucm: suppress the no device (no UCM card) errors on request

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It seems that users are confused when the UCM configuration
is not ready for the particular hardware. Actually, we don't
allow a fine grained message classification in alsa-lib and
UCM API. Allow suppression of this specific type of messages
on the application request (typically alsactl).

BugLink: https://github.com/alsa-project/alsa-utils/issues/111
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2021-10-28 11:48:54 +02:00
parent a6a22d82a0
commit 23198a72cd
3 changed files with 10 additions and 1 deletions
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7
src/ucm/main.c
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@ -1383,6 +1383,11 @@ int snd_use_case_mgr_open(snd_use_case_mgr_t **uc_mgr,
INIT_LIST_HEAD(&mgr->variable_list);
pthread_mutex_init(&mgr->mutex, NULL);
if (card_name && *card_name == '-') {
card_name++;
mgr->suppress_nodev_errors = 1;
}
err = uc_mgr_card_open(mgr);
if (err < 0) {
uc_mgr_free(mgr);
@ -1402,6 +1407,8 @@ int snd_use_case_mgr_open(snd_use_case_mgr_t **uc_mgr,
/* get info on use_cases and verify against card */
err = import_master_config(mgr);
if (err < 0) {
if (err == -ENXIO && mgr->suppress_nodev_errors)
goto _err;
uc_error("error: failed to import %s use case configuration %d",
card_name, err);
goto _err;