ALSA: usb-audio - Check the dB-range validity in the later read, too
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>
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index cdd19d7..78a5abd 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -881,8 +881,17 @@
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;