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| author | Takashi Iwai <tiwai@suse.de> | 2011-05-22 10:01:29 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-05-22 10:01:29 +0200 |
| commit | 02e5fbf622aabf68bdc02282a17a3aeed054237a (patch) | |
| tree | 60f2d4e09464dbf338c832bb39f861f29779b86b /sound/usb/mixer.c | |
| parent | b759b3ac9aee3afb01c21b603970ebb200c8048e (diff) | |
| parent | bfe9fc8aebc997ce8bcf8ac0586c84a247812064 (diff) | |
Merge branch 'topic/misc' into for-linus
Diffstat (limited to 'sound/usb/mixer.c')
| -rw-r--r-- | sound/usb/mixer.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 6ec33b62e6cf..eab06edcc9b7 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; |