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| author | Takashi Iwai <tiwai@suse.de> | 2009-09-10 13:33:06 (GMT) |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-09-10 13:33:06 (GMT) |
| commit | b34c8663940dfc7da767c42b37605e5ad3ae11f7 (patch) | |
| tree | 3e6639dd10ec737651871649c14fff9798511afa /sound/usb/usbmixer.c | |
| parent | 3827119e207823ff0f3e85271bef7a0dc953ee38 (diff) | |
| parent | eedbdf03a25ab3b2c332ad7fa205aa8ffbe477ba (diff) | |
| download | linux-b34c8663940dfc7da767c42b37605e5ad3ae11f7.tar.xz | |
Merge branch 'topic/tlv-minmax' into for-linus
* topic/tlv-minmax:
ALSA: usb-audio - Correct bogus volume dB information
ALSA: usb-audio - Use the new TLV_DB_MINMAX type
ALSA: Add new TLV types for dBwith min/max
Diffstat (limited to 'sound/usb/usbmixer.c')
| -rw-r--r-- | sound/usb/usbmixer.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/sound/usb/usbmixer.c b/sound/usb/usbmixer.c index ec9cdf9..df89691 100644 --- a/sound/usb/usbmixer.c +++ b/sound/usb/usbmixer.c @@ -461,7 +461,7 @@ static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, unsigned int size, unsigned int __user *_tlv) { struct usb_mixer_elem_info *cval = kcontrol->private_data; - DECLARE_TLV_DB_SCALE(scale, 0, 0, 0); + DECLARE_TLV_DB_MINMAX(scale, 0, 0); if (size < sizeof(scale)) return -ENOMEM; @@ -469,7 +469,16 @@ static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, * while ALSA TLV contains in 1/100 dB unit */ scale[2] = (convert_signed_value(cval, cval->min) * 100) / 256; - scale[3] = (convert_signed_value(cval, cval->res) * 100) / 256; + scale[3] = (convert_signed_value(cval, cval->max) * 100) / 256; + if (scale[3] <= scale[2]) { + /* something is wrong; assume it's either from/to 0dB */ + if (scale[2] < 0) + scale[3] = 0; + else if (scale[2] > 0) + scale[2] = 0; + else /* totally crap, return an error */ + return -EINVAL; + } if (copy_to_user(_tlv, scale, sizeof(scale))) return -EFAULT; return 0; |