1 files changed, 15 insertions, 6 deletions

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index cdd19d7fe500..60f65ace7474 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -296,7 +296,7 @@ static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int v
                 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
                                     USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
                                     validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
-                                    buf, val_len, 100) >= val_len) {
+                                    buf, val_len) >= val_len) {
                         *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
                         snd_usb_autosuspend(cval->mixer->chip);
                         return 0;
@@ -333,7 +333,7 @@ static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int v
         ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
                               USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
                               validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
-                              buf, size, 1000);
+                              buf, size);
         snd_usb_autosuspend(chip);
 
         if (ret < 0) {
@@ -445,7 +445,7 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
                                     usb_sndctrlpipe(chip->dev, 0), request,
                                     USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
                                     validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
-                                    buf, val_len, 100) >= 0) {
+                                    buf, val_len) >= 0) {
                         snd_usb_autosuspend(chip);
                         return 0;
                 }
@@ -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;
@@ -1250,7 +1259,7 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void
                                 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 0);
                 }
         } else { /* UAC_VERSION_2 */
-                for (i = 0; i < 30/2; i++) {
+                for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) {
                         unsigned int ch_bits = 0;
                         unsigned int ch_read_only = 0;