ALSA: core: Allow card id change to the same string
When user want to change the card id to the same string
on the card via /sys/class/sound/cardX/id, do not
report error. Instead return with success without
doing anything.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/init.c b/sound/core/init.c
index ec4a50c..2de45fb 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -607,11 +607,16 @@
return -EEXIST;
}
for (idx = 0; idx < snd_ecards_limit; idx++) {
- if (snd_cards[idx] && !strcmp(snd_cards[idx]->id, buf1))
- goto __exist;
+ if (snd_cards[idx] && !strcmp(snd_cards[idx]->id, buf1)) {
+ if (card == snd_cards[idx])
+ goto __ok;
+ else
+ goto __exist;
+ }
}
strcpy(card->id, buf1);
snd_info_card_id_change(card);
+__ok:
mutex_unlock(&snd_card_mutex);
return count;