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authorTakashi Iwai <tiwai@suse.de>2011-05-22 10:01:29 +0200
committerTakashi Iwai <tiwai@suse.de>2011-05-22 10:01:29 +0200
commit02e5fbf622aabf68bdc02282a17a3aeed054237a (patch)
tree60f2d4e09464dbf338c832bb39f861f29779b86b /sound/usb/mixer.c
parentb759b3ac9aee3afb01c21b603970ebb200c8048e (diff)
parentbfe9fc8aebc997ce8bcf8ac0586c84a247812064 (diff)
Merge branch 'topic/misc' into for-linus
Diffstat (limited to 'sound/usb/mixer.c')
-rw-r--r--sound/usb/mixer.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 6ec33b62e6c..eab06edcc9b 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -1097,11 +1097,13 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
append_ctl_name(kctl, control == UAC_FU_MUTE ?
" Switch" : " Volume");
if (control == UAC_FU_VOLUME) {
- kctl->tlv.c = mixer_vol_tlv;
- kctl->vd[0].access |=
- SNDRV_CTL_ELEM_ACCESS_TLV_READ |
- SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
check_mapped_dB(map, cval);
+ if (cval->dBmin < cval->dBmax) {
+ kctl->tlv.c = mixer_vol_tlv;
+ kctl->vd[0].access |=
+ SNDRV_CTL_ELEM_ACCESS_TLV_READ |
+ SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
+ }
}
break;