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author | Takashi Iwai <tiwai@suse.de> | 2014-11-18 11:02:14 +0100 |
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committer | Takashi Iwai <tiwai@suse.de> | 2014-11-20 21:46:32 +0100 |
commit | 5aeee3424fa5926a53885b9defb593971e446d77 (patch) | |
tree | 9456382d8eb2a3530314b04789de371e18b7ce56 /sound/usb/mixer.c | |
parent | a69862d8d04e4877965cc938140c9f8e6da0b827 (diff) | |
download | op-kernel-dev-5aeee3424fa5926a53885b9defb593971e446d77.zip op-kernel-dev-5aeee3424fa5926a53885b9defb593971e446d77.tar.gz |
ALSA: usb-audio: Refactor ignore_ctl_error checks
Introduce an internal helper macro for avoiding many open codes.
The only slight behavior change is in a couple of get ballcks where
the value is reset at error no matter whether ignore_ctl_error is set
or not. Actually this is even safer than before.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/mixer.c')
-rw-r--r-- | sound/usb/mixer.c | 39 |
1 files changed, 16 insertions, 23 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index c6209ce..a4fbfff 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -136,6 +136,10 @@ check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen) return strlcpy(buf, p->name, buflen); } +/* ignore the error value if ignore_ctl_error flag is set */ +#define filter_error(cval, err) \ + ((cval)->mixer->ignore_ctl_error ? 0 : (err)) + /* check whether the control should be ignored */ static inline int check_ignored_ctl(const struct usbmix_name_map *p) @@ -1088,7 +1092,7 @@ static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, continue; err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &val); if (err < 0) - return cval->mixer->ignore_ctl_error ? 0 : err; + return filter_error(cval, err); val = get_relative_value(cval, val); ucontrol->value.integer.value[cnt] = val; cnt++; @@ -1098,7 +1102,7 @@ static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, /* master channel */ err = snd_usb_get_cur_mix_value(cval, 0, 0, &val); if (err < 0) - return cval->mixer->ignore_ctl_error ? 0 : err; + return filter_error(cval, err); val = get_relative_value(cval, val); ucontrol->value.integer.value[0] = val; } @@ -1120,7 +1124,7 @@ static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, continue; err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &oval); if (err < 0) - return cval->mixer->ignore_ctl_error ? 0 : err; + return filter_error(cval, err); val = ucontrol->value.integer.value[cnt]; val = get_abs_value(cval, val); if (oval != val) { @@ -1133,7 +1137,7 @@ static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, /* master channel */ err = snd_usb_get_cur_mix_value(cval, 0, 0, &oval); if (err < 0) - return cval->mixer->ignore_ctl_error ? 0 : err; + return filter_error(cval, err); val = ucontrol->value.integer.value[0]; val = get_abs_value(cval, val); if (val != oval) { @@ -1628,12 +1632,10 @@ static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, int err, val; err = get_cur_ctl_value(cval, cval->control << 8, &val); - if (err < 0 && cval->mixer->ignore_ctl_error) { + if (err < 0) { ucontrol->value.integer.value[0] = cval->min; - return 0; + return filter_error(cval, err); } - if (err < 0) - return err; val = get_relative_value(cval, val); ucontrol->value.integer.value[0] = val; return 0; @@ -1647,11 +1649,8 @@ static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, int val, oval, err; err = get_cur_ctl_value(cval, cval->control << 8, &oval); - if (err < 0) { - if (cval->mixer->ignore_ctl_error) - return 0; - return err; - } + if (err < 0) + return filter_error(cval, err); val = ucontrol->value.integer.value[0]; val = get_abs_value(cval, val); if (val != oval) { @@ -1923,11 +1922,8 @@ static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, err = get_cur_ctl_value(cval, cval->control << 8, &val); if (err < 0) { - if (cval->mixer->ignore_ctl_error) { - ucontrol->value.enumerated.item[0] = 0; - return 0; - } - return err; + ucontrol->value.enumerated.item[0] = 0; + return filter_error(cval, err); } val = get_relative_value(cval, val); ucontrol->value.enumerated.item[0] = val; @@ -1942,11 +1938,8 @@ static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, int val, oval, err; err = get_cur_ctl_value(cval, cval->control << 8, &oval); - if (err < 0) { - if (cval->mixer->ignore_ctl_error) - return 0; - return err; - } + if (err < 0) + return filter_error(cval, err); val = ucontrol->value.enumerated.item[0]; val = get_abs_value(cval, val); if (val != oval) { |