ALSA: usb: mixer: use snd_kcontrol_chip()

We can use snd_kcontrol_chip(). Let's use it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/87msbpaud1.wl-kuninori.morimoto.gx@renesas.com

Author: morimoto

sound/usb/mixer.c

@@ -547,7 +547,7 @@ int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
 int snd_usb_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;
+	struct usb_mixer_elem_info *cval = snd_kcontrol_chip(kcontrol);
 	DECLARE_TLV_DB_MINMAX(scale, 0, 0);
 
 	if (size < sizeof(scale))
@@ -1367,7 +1367,7 @@ static int get_max_exposed(struct usb_mixer_elem_info *cval)
 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol,
 				  struct snd_ctl_elem_info *uinfo)
 {
-	struct usb_mixer_elem_info *cval = kcontrol->private_data;
+	struct usb_mixer_elem_info *cval = snd_kcontrol_chip(kcontrol);
 
 	if (cval->val_type == USB_MIXER_BOOLEAN ||
 	    cval->val_type == USB_MIXER_INV_BOOLEAN)
@@ -1399,7 +1399,7 @@ static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol,
 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol,
 				 struct snd_ctl_elem_value *ucontrol)
 {
-	struct usb_mixer_elem_info *cval = kcontrol->private_data;
+	struct usb_mixer_elem_info *cval = snd_kcontrol_chip(kcontrol);
 	int c, cnt, val, err;
 
 	ucontrol->value.integer.value[0] = cval->min;
@@ -1431,7 +1431,7 @@ static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol,
 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol,
 				 struct snd_ctl_elem_value *ucontrol)
 {
-	struct usb_mixer_elem_info *cval = kcontrol->private_data;
+	struct usb_mixer_elem_info *cval = snd_kcontrol_chip(kcontrol);
 	int max_val = get_max_exposed(cval);
 	int c, cnt, val, oval, err;
 	int changed = 0;
@@ -1475,7 +1475,7 @@ static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol,
 static int mixer_ctl_master_bool_get(struct snd_kcontrol *kcontrol,
 				     struct snd_ctl_elem_value *ucontrol)
 {
-	struct usb_mixer_elem_info *cval = kcontrol->private_data;
+	struct usb_mixer_elem_info *cval = snd_kcontrol_chip(kcontrol);
 	int val, err;
 
 	err = snd_usb_get_cur_mix_value(cval, 0, 0, &val);
@@ -1543,7 +1543,7 @@ static int get_connector_value(struct usb_mixer_elem_info *cval,
 static int mixer_ctl_connector_get(struct snd_kcontrol *kcontrol,
 				   struct snd_ctl_elem_value *ucontrol)
 {
-	struct usb_mixer_elem_info *cval = kcontrol->private_data;
+	struct usb_mixer_elem_info *cval = snd_kcontrol_chip(kcontrol);
 	int ret, val;
 
 	ret = get_connector_value(cval, kcontrol->id.name, &val);
@@ -2302,7 +2302,7 @@ static int parse_audio_mixer_unit(struct mixer_build *state, int unitid,
 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol,
 				  struct snd_ctl_elem_value *ucontrol)
 {
-	struct usb_mixer_elem_info *cval = kcontrol->private_data;
+	struct usb_mixer_elem_info *cval = snd_kcontrol_chip(kcontrol);
 	int err, val;
 
 	err = get_cur_ctl_value(cval, cval->control << 8, &val);
@@ -2319,7 +2319,7 @@ static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol,
 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol,
 				  struct snd_ctl_elem_value *ucontrol)
 {
-	struct usb_mixer_elem_info *cval = kcontrol->private_data;
+	struct usb_mixer_elem_info *cval = snd_kcontrol_chip(kcontrol);
 	int val, oval, err;
 
 	err = get_cur_ctl_value(cval, cval->control << 8, &oval);
@@ -2654,7 +2654,7 @@ static int parse_audio_extension_unit(struct mixer_build *state, int unitid,
 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol,
 				   struct snd_ctl_elem_info *uinfo)
 {
-	struct usb_mixer_elem_info *cval = kcontrol->private_data;
+	struct usb_mixer_elem_info *cval = snd_kcontrol_chip(kcontrol);
 	const char **itemlist = (const char **)kcontrol->private_value;
 
 	if (snd_BUG_ON(!itemlist))
@@ -2666,7 +2666,7 @@ static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol,
 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol,
 				  struct snd_ctl_elem_value *ucontrol)
 {
-	struct usb_mixer_elem_info *cval = kcontrol->private_data;
+	struct usb_mixer_elem_info *cval = snd_kcontrol_chip(kcontrol);
 	int val, err;
 
 	err = get_cur_ctl_value(cval, cval->control << 8, &val);
@@ -2683,7 +2683,7 @@ static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol,
 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol,
 				  struct snd_ctl_elem_value *ucontrol)
 {
-	struct usb_mixer_elem_info *cval = kcontrol->private_data;
+	struct usb_mixer_elem_info *cval = snd_kcontrol_chip(kcontrol);
 	int val, oval, err;
 
 	err = get_cur_ctl_value(cval, cval->control << 8, &oval);