Patch "ALSA: hda/tas2781: add locks to kcontrols" has been added to the 6.8-stable tree

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This is a note to let you know that I've just added the patch titled

    ALSA: hda/tas2781: add locks to kcontrols

to the 6.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     alsa-hda-tas2781-add-locks-to-kcontrols.patch
and it can be found in the queue-6.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 15bc3066d2378eef1b45254be9df23b0dd7f1667 Mon Sep 17 00:00:00 2001
From: Gergo Koteles <soyer@xxxxxx>
Date: Tue, 26 Mar 2024 17:18:46 +0100
Subject: ALSA: hda/tas2781: add locks to kcontrols

From: Gergo Koteles <soyer@xxxxxx>

commit 15bc3066d2378eef1b45254be9df23b0dd7f1667 upstream.

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

Fixes: 5be27f1e3ec9 ("ALSA: hda/tas2781: Add tas2781 HDA driver")
CC: stable@xxxxxxxxxxxxxxx
Signed-off-by: Gergo Koteles <soyer@xxxxxx>
Message-ID: <e35b867f6fe5fa1f869dd658a0a1f2118b737f57.1711469583.git.soyer@xxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 sound/pci/hda/tas2781_hda_i2c.c |   50 ++++++++++++++++++++++++++++++++++++++--
 1 file changed, 48 insertions(+), 2 deletions(-)

--- a/sound/pci/hda/tas2781_hda_i2c.c
+++ b/sound/pci/hda/tas2781_hda_i2c.c
@@ -197,8 +197,12 @@ static int tasdevice_get_profile_id(stru
 {
 	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;
 }
 
@@ -212,11 +216,15 @@ static int tasdevice_set_profile_id(stru
 
 	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;
 }
 
@@ -253,8 +261,12 @@ static int tasdevice_program_get(struct
 {
 	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;
 }
 
@@ -269,11 +281,15 @@ static int tasdevice_program_put(struct
 
 	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;
 }
 
@@ -282,8 +298,12 @@ static int tasdevice_config_get(struct s
 {
 	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;
 }
 
@@ -298,11 +318,15 @@ static int tasdevice_config_put(struct s
 
 	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;
 }
 
@@ -312,8 +336,15 @@ static int tas2781_amp_getvol(struct snd
 	struct tasdevice_priv *tas_priv = snd_kcontrol_chip(kcontrol);
 	struct soc_mixer_control *mc =
 		(struct soc_mixer_control *)kcontrol->private_value;
+	int ret;
 
-	return tasdevice_amp_getvol(tas_priv, ucontrol, mc);
+	mutex_lock(&tas_priv->codec_lock);
+
+	ret = tasdevice_amp_getvol(tas_priv, ucontrol, mc);
+
+	mutex_unlock(&tas_priv->codec_lock);
+
+	return ret;
 }
 
 static int tas2781_amp_putvol(struct snd_kcontrol *kcontrol,
@@ -322,9 +353,16 @@ static int tas2781_amp_putvol(struct snd
 	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,
@@ -332,10 +370,14 @@ static int tas2781_force_fwload_get(stru
 {
 	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;
 }
 
@@ -345,6 +387,8 @@ static int tas2781_force_fwload_put(stru
 	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 {
@@ -354,6 +398,8 @@ static int tas2781_force_fwload_put(stru
 	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;
 }
 


Patches currently in stable-queue which might be from soyer@xxxxxx are

queue-6.8/alsa-hda-tas2781-remove-digital-gain-kcontrol.patch
queue-6.8/alsa-hda-tas2781-add-locks-to-kcontrols.patch




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