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authorTakashi Iwai <tiwai@suse.de>2011-08-19 08:30:53 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-11-21 14:31:17 -0800
commit9338f407e30015cd9d236d8a678cacd2c72d4a31 (patch)
tree63afae042fb46368bc5690989a9c956f93008358 /sound/usb
parentf73870d6d33cd24c8fe2a7b39b2f99c433804945 (diff)
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 <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/mixer.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index cdd19d7fe500..a033129e9733 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;