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authorTakashi Iwai <tiwai@suse.de>2014-11-18 11:02:14 +0100
committerTakashi Iwai <tiwai@suse.de>2014-11-20 21:46:32 +0100
commit5aeee3424fa5926a53885b9defb593971e446d77 (patch)
tree9456382d8eb2a3530314b04789de371e18b7ce56 /sound/usb
parenta69862d8d04e4877965cc938140c9f8e6da0b827 (diff)
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')
-rw-r--r--sound/usb/mixer.c39
1 files changed, 16 insertions, 23 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index c6209ce5a430..a4fbfff63191 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) {