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ALSA: core: Allow card id change to the same string

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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>
This commit is contained in:
Peter Ujfalusi 2010-09-16 10:26:54 +03:00 committed by Takashi Iwai
parent 1a4e34e67c
commit 4437ecdc71
1 changed files with 7 additions and 2 deletions
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9
sound/core/init.c
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@ -607,11 +607,16 @@ card_id_store_attr(struct device *dev, struct device_attribute *attr,
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;