1 files changed, 11 insertions, 2 deletions

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index cdd19d7fe500..78a5abda6793 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;