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ALSA: usb-audio: Remove set but not used variable 'first_ch_bits' 

Fixes gcc '-Wunused-but-set-variable' warning:

sound/usb/mixer.c: In function 'parse_audio_feature_unit':
sound/usb/mixer.c:1838:28: warning:
 variable 'first_ch_bits' set but not used [-Wunused-but-set-variable]

It never used since 2.6

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
YueHaibing 2019-01-09 02:20:16 +00:00 committed by Takashi Iwai
parent fc2a6cf060
commit 36c346e1c5
1 changed files with 1 additions and 5 deletions
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6
sound/usb/mixer.c
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@ -1835,7 +1835,7 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
{
int channels, i, j;
struct usb_audio_term iterm;
unsigned int master_bits, first_ch_bits;
unsigned int master_bits;
int err, csize;
struct uac_feature_unit_descriptor *hdr = _ftr;
__u8 *bmaControls;
@ -1926,10 +1926,6 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
break;
}
if (channels > 0)
first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
else
first_ch_bits = 0;
if (state->mixer->protocol == UAC_VERSION_1) {
/* check all control types */