From 9338f407e30015cd9d236d8a678cacd2c72d4a31 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 19 Aug 2011 08:30:53 +0200 Subject: ALSA: usb-audio - Check the dB-range validity in the later read, too commit 9fcd0ab130579d9742538340edda3225f2b49a3e upstream. When the initial check of dB-range failed due to the read error, try to check again at the later read, too. When an invalid dB range is found, remove TLV flags and notify the mixer info change. Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/usb/mixer.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) (limited to 'sound') diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index cdd19d7fe50..a033129e973 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -881,8 +881,17 @@ static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_ uinfo->value.integer.min = 0; uinfo->value.integer.max = 1; } else { - if (! cval->initialized) - get_min_max(cval, 0); + if (!cval->initialized) { + get_min_max(cval, 0); + if (cval->initialized && cval->dBmin >= cval->dBmax) { + kcontrol->vd[0].access &= + ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ | + SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK); + snd_ctl_notify(cval->mixer->chip->card, + SNDRV_CTL_EVENT_MASK_INFO, + &kcontrol->id); + } + } uinfo->value.integer.min = 0; uinfo->value.integer.max = (cval->max - cval->min + cval->res - 1) / cval->res; -- cgit v1.2.3