ALSA: hda/tas2781: add locks to kcontrols

commit 15bc306 upstream.

The rcabin.profile_cfg_id, cur_prog, cur_conf, force_fwload_status
variables are acccessible from multiple threads and therefore require
locking.

Fixes: 5be27f1 ("ALSA: hda/tas2781: Add tas2781 HDA driver")
CC: stable@vger.kernel.org
Signed-off-by: Gergo Koteles <soyer@irl.hu>
Message-ID: <e35b867f6fe5fa1f869dd658a0a1f2118b737f57.1711469583.git.soyer@irl.hu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

sound/pci/hda/tas2781_hda_i2c.c

@@ -179,8 +179,12 @@ static int tasdevice_get_profile_id(struct snd_kcontrol *kcontrol,
 {
 	struct tasdevice_priv *tas_priv = snd_kcontrol_chip(kcontrol);
 
+	mutex_lock(&tas_priv->codec_lock);
+
 	ucontrol->value.integer.value[0] = tas_priv->rcabin.profile_cfg_id;
 
+	mutex_unlock(&tas_priv->codec_lock);
+
 	return 0;
 }
 
@@ -194,11 +198,15 @@ static int tasdevice_set_profile_id(struct snd_kcontrol *kcontrol,
 
 	val = clamp(nr_profile, 0, max);
 
+	mutex_lock(&tas_priv->codec_lock);
+
 	if (tas_priv->rcabin.profile_cfg_id != val) {
 		tas_priv->rcabin.profile_cfg_id = val;
 		ret = 1;
 	}
 
+	mutex_unlock(&tas_priv->codec_lock);
+
 	return ret;
 }
 
@@ -235,8 +243,12 @@ static int tasdevice_program_get(struct snd_kcontrol *kcontrol,
 {
 	struct tasdevice_priv *tas_priv = snd_kcontrol_chip(kcontrol);
 
+	mutex_lock(&tas_priv->codec_lock);
+
 	ucontrol->value.integer.value[0] = tas_priv->cur_prog;
 
+	mutex_unlock(&tas_priv->codec_lock);
+
 	return 0;
 }
 
@@ -251,11 +263,15 @@ static int tasdevice_program_put(struct snd_kcontrol *kcontrol,
 
 	val = clamp(nr_program, 0, max);
 
+	mutex_lock(&tas_priv->codec_lock);
+
 	if (tas_priv->cur_prog != val) {
 		tas_priv->cur_prog = val;
 		ret = 1;
 	}
 
+	mutex_unlock(&tas_priv->codec_lock);
+
 	return ret;
 }
 
@@ -264,8 +280,12 @@ static int tasdevice_config_get(struct snd_kcontrol *kcontrol,
 {
 	struct tasdevice_priv *tas_priv = snd_kcontrol_chip(kcontrol);
 
+	mutex_lock(&tas_priv->codec_lock);
+
 	ucontrol->value.integer.value[0] = tas_priv->cur_conf;
 
+	mutex_unlock(&tas_priv->codec_lock);
+
 	return 0;
 }
 
@@ -280,11 +300,15 @@ static int tasdevice_config_put(struct snd_kcontrol *kcontrol,
 
 	val = clamp(nr_config, 0, max);
 
+	mutex_lock(&tas_priv->codec_lock);
+
 	if (tas_priv->cur_conf != val) {
 		tas_priv->cur_conf = val;
 		ret = 1;
 	}
 
+	mutex_unlock(&tas_priv->codec_lock);
+
 	return ret;
 }
 
@@ -294,8 +318,15 @@ static int tas2781_amp_getvol(struct snd_kcontrol *kcontrol,
 	struct tasdevice_priv *tas_priv = snd_kcontrol_chip(kcontrol);
 	struct soc_mixer_control *mc =
 		(struct soc_mixer_control *)kcontrol->private_value;
+	int ret;
+
+	mutex_lock(&tas_priv->codec_lock);
+
+	ret = tasdevice_amp_getvol(tas_priv, ucontrol, mc);
+
+	mutex_unlock(&tas_priv->codec_lock);
 
-	return tasdevice_amp_getvol(tas_priv, ucontrol, mc);
+	return ret;
 }
 
 static int tas2781_amp_putvol(struct snd_kcontrol *kcontrol,
@@ -304,20 +335,31 @@ static int tas2781_amp_putvol(struct snd_kcontrol *kcontrol,
 	struct tasdevice_priv *tas_priv = snd_kcontrol_chip(kcontrol);
 	struct soc_mixer_control *mc =
 		(struct soc_mixer_control *)kcontrol->private_value;
+	int ret;
+
+	mutex_lock(&tas_priv->codec_lock);
 
 	/* The check of the given value is in tasdevice_amp_putvol. */
-	return tasdevice_amp_putvol(tas_priv, ucontrol, mc);
+	ret = tasdevice_amp_putvol(tas_priv, ucontrol, mc);
+
+	mutex_unlock(&tas_priv->codec_lock);
+
+	return ret;
 }
 
 static int tas2781_force_fwload_get(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol)
 {
 	struct tasdevice_priv *tas_priv = snd_kcontrol_chip(kcontrol);
 
+	mutex_lock(&tas_priv->codec_lock);
+
 	ucontrol->value.integer.value[0] = (int)tas_priv->force_fwload_status;
 	dev_dbg(tas_priv->dev, "%s : Force FWload %s\n", __func__,
 			tas_priv->force_fwload_status ? "ON" : "OFF");
 
+	mutex_unlock(&tas_priv->codec_lock);
+
 	return 0;
 }
 
@@ -327,6 +369,8 @@ static int tas2781_force_fwload_put(struct snd_kcontrol *kcontrol,
 	struct tasdevice_priv *tas_priv = snd_kcontrol_chip(kcontrol);
 	bool change, val = (bool)ucontrol->value.integer.value[0];
 
+	mutex_lock(&tas_priv->codec_lock);
+
 	if (tas_priv->force_fwload_status == val)
 		change = false;
 	else {
@@ -336,6 +380,8 @@ static int tas2781_force_fwload_put(struct snd_kcontrol *kcontrol,
 	dev_dbg(tas_priv->dev, "%s : Force FWload %s\n", __func__,
 		tas_priv->force_fwload_status ? "ON" : "OFF");
 
+	mutex_unlock(&tas_priv->codec_lock);
+
 	return change;
 }