add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/sound/soc/soc-ops.c
..
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@@ -63,11 +63,8 @@
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 	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
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 	unsigned int val, item;
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 	unsigned int reg_val;
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-	int ret;
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-	ret = snd_soc_component_read(component, e->reg, &reg_val);
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-	if (ret)
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-		return ret;
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+	reg_val = snd_soc_component_read(component, e->reg);
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 	val = (reg_val >> e->shift_l) & e->mask;
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 	item = snd_soc_enum_val_to_item(e, val);
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 	ucontrol->value.enumerated.item[0] = item;
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@@ -136,10 +133,7 @@
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 	int ret;
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 	unsigned int val;
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-	ret = snd_soc_component_read(component, reg, &val);
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-	if (ret < 0)
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-		return ret;
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-
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+	val = snd_soc_component_read(component, reg);
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 	val = (val >> shift) & mask;
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 	if (!sign_bit) {
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@@ -323,7 +317,7 @@
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 		mask = BIT(sign_bit + 1) - 1;
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 	val = ucontrol->value.integer.value[0];
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-	if (mc->platform_max && val > mc->platform_max)
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+	if (mc->platform_max && ((int)val + min) > mc->platform_max)
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 		return -EINVAL;
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 	if (val > max - min)
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 		return -EINVAL;
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@@ -336,7 +330,7 @@
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 	val = val << shift;
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 	if (snd_soc_volsw_is_stereo(mc)) {
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 		val2 = ucontrol->value.integer.value[1];
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-		if (mc->platform_max && val2 > mc->platform_max)
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+		if (mc->platform_max && ((int)val2 + min) > mc->platform_max)
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 			return -EINVAL;
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 		if (val2 > max - min)
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 			return -EINVAL;
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@@ -395,19 +389,12 @@
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 	int min = mc->min;
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 	unsigned int mask = (1U << (fls(min + max) - 1)) - 1;
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 	unsigned int val;
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-	int ret;
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-	ret = snd_soc_component_read(component, reg, &val);
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-	if (ret < 0)
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-		return ret;
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-
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+	val = snd_soc_component_read(component, reg);
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 	ucontrol->value.integer.value[0] = ((val >> shift) - min) & mask;
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 	if (snd_soc_volsw_is_stereo(mc)) {
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-		ret = snd_soc_component_read(component, reg2, &val);
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-		if (ret < 0)
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-			return ret;
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-
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+		val = snd_soc_component_read(component, reg2);
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 		val = ((val >> rshift) - min) & mask;
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 		ucontrol->value.integer.value[1] = val;
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 	}
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@@ -445,7 +432,7 @@
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 	val = ucontrol->value.integer.value[0];
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 	if (mc->platform_max && val > mc->platform_max)
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 		return -EINVAL;
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-	if (val > max - min)
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+	if (val > max)
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 		return -EINVAL;
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 	if (val < 0)
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 		return -EINVAL;
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@@ -458,8 +445,15 @@
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 		return err;
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 	if (snd_soc_volsw_is_stereo(mc)) {
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+		val2 = ucontrol->value.integer.value[1];
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+
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+		if (mc->platform_max && val2 > mc->platform_max)
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+			return -EINVAL;
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+		if (val2 > max)
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+			return -EINVAL;
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+
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 		val_mask = mask << rshift;
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-		val2 = (ucontrol->value.integer.value[1] + min) & mask;
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+		val2 = (val2 + min) & mask;
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 		val2 = val2 << rshift;
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 		err = snd_soc_component_update_bits(component, reg2, val_mask,
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@@ -523,7 +517,15 @@
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 	unsigned int mask = (1 << fls(max)) - 1;
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 	unsigned int invert = mc->invert;
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 	unsigned int val, val_mask;
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-	int err, ret;
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+	int err, ret, tmp;
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+
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+	tmp = ucontrol->value.integer.value[0];
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+	if (tmp < 0)
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+		return -EINVAL;
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+	if (mc->platform_max && tmp > mc->platform_max)
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+		return -EINVAL;
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+	if (tmp > mc->max - mc->min)
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+		return -EINVAL;
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 	if (invert)
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 		val = (max - ucontrol->value.integer.value[0]) & mask;
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@@ -538,6 +540,14 @@
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 	ret = err;
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 	if (snd_soc_volsw_is_stereo(mc)) {
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+		tmp = ucontrol->value.integer.value[1];
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+		if (tmp < 0)
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+			return -EINVAL;
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+		if (mc->platform_max && tmp > mc->platform_max)
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+			return -EINVAL;
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+		if (tmp > mc->max - mc->min)
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+			return -EINVAL;
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+
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 		if (invert)
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 			val = (max - ucontrol->value.integer.value[1]) & mask;
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 		else
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@@ -580,12 +590,8 @@
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 	unsigned int mask = (1 << fls(max)) - 1;
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 	unsigned int invert = mc->invert;
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 	unsigned int val;
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-	int ret;
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-	ret = snd_soc_component_read(component, reg, &val);
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-	if (ret)
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-		return ret;
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-
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+	val = snd_soc_component_read(component, reg);
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 	ucontrol->value.integer.value[0] = (val >> shift) & mask;
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 	if (invert)
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 		ucontrol->value.integer.value[0] =
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@@ -595,10 +601,7 @@
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 			ucontrol->value.integer.value[0] - min;
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 	if (snd_soc_volsw_is_stereo(mc)) {
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-		ret = snd_soc_component_read(component, rreg, &val);
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-		if (ret)
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-			return ret;
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-
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+		val = snd_soc_component_read(component, rreg);
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 		ucontrol->value.integer.value[1] = (val >> shift) & mask;
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 		if (invert)
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 			ucontrol->value.integer.value[1] =
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@@ -624,23 +627,16 @@
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 int snd_soc_limit_volume(struct snd_soc_card *card,
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 	const char *name, int max)
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 {
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-	struct snd_card *snd_card = card->snd_card;
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 	struct snd_kcontrol *kctl;
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 	struct soc_mixer_control *mc;
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-	int found = 0;
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 	int ret = -EINVAL;
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 	/* Sanity check for name and max */
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 	if (unlikely(!name || max <= 0))
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 		return -EINVAL;
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-	list_for_each_entry(kctl, &snd_card->controls, list) {
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-		if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
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-			found = 1;
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-			break;
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-		}
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-	}
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-	if (found) {
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+	kctl = snd_soc_card_get_kcontrol(card, name);
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+	if (kctl) {
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 		mc = (struct soc_mixer_control *)kctl->private_value;
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 		if (max <= mc->max) {
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 			mc->platform_max = max;
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@@ -872,12 +868,9 @@
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 	long val = 0;
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 	unsigned int regval;
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 	unsigned int i;
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-	int ret;
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 	for (i = 0; i < regcount; i++) {
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-		ret = snd_soc_component_read(component, regbase+i, &regval);
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-		if (ret)
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-			return ret;
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+		regval = snd_soc_component_read(component, regbase+i);
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 		val |= (regval & regwmask) << (regwshift*(regcount-i-1));
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 	}
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 	val &= mask;
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@@ -959,12 +952,8 @@
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 	unsigned int mask = 1 << shift;
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 	unsigned int invert = mc->invert != 0;
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 	unsigned int val;
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-	int ret;
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-	ret = snd_soc_component_read(component, reg, &val);
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-	if (ret)
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-		return ret;
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-
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+	val = snd_soc_component_read(component, reg);
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 	val &= mask;
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 	if (shift != 0 && val != 0)