ASoC: ab8500-codec: Move control lock to the driver level

The ab8500 driver uses a driver specific lock to protect concurrent access
to some of the control put/get handlers and uses the snd_soc_codec mutex for
some others. This patch updates the driver to consistently use the driver
specific lock for all controls. This will allow us to eventually remove the
snd_soc_codec mutex.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/ab8500-codec.c b/sound/soc/codecs/ab8500-codec.c
index fd43827..7dfbc99 100644 (file)
--- a/sound/soc/codecs/ab8500-codec.c
+++ b/sound/soc/codecs/ab8500-codec.c
@@ -126,13 +126,13 @@ struct ab8500_codec_drvdata_dbg {
 /* Private data for AB8500 device-driver */
 struct ab8500_codec_drvdata {
        struct regmap *regmap;
+       struct mutex ctrl_lock;
 
        /* Sidetone */
        long *sid_fir_values;
        enum sid_state sid_status;
 
        /* ANC */
-       struct mutex anc_lock;
        long *anc_fir_values;
        long *anc_iir_values;
        enum anc_state anc_status;
@@ -1129,9 +1129,9 @@ static int sid_status_control_get(struct snd_kcontrol *kcontrol,
        struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
        struct ab8500_codec_drvdata *drvdata = dev_get_drvdata(codec->dev);
 
-       mutex_lock(&codec->mutex);
+       mutex_lock(&drvdata->ctrl_lock);
        ucontrol->value.integer.value[0] = drvdata->sid_status;
-       mutex_unlock(&codec->mutex);
+       mutex_unlock(&drvdata->ctrl_lock);
 
        return 0;
 }
@@ -1154,7 +1154,7 @@ static int sid_status_control_put(struct snd_kcontrol *kcontrol,
                return -EIO;
        }
 
-       mutex_lock(&codec->mutex);
+       mutex_lock(&drvdata->ctrl_lock);
 
        sidconf = snd_soc_read(codec, AB8500_SIDFIRCONF);
        if (((sidconf & BIT(AB8500_SIDFIRCONF_FIRSIDBUSY)) != 0)) {
@@ -1185,7 +1185,7 @@ static int sid_status_control_put(struct snd_kcontrol *kcontrol,
        drvdata->sid_status = SID_FIR_CONFIGURED;
 
 out:
-       mutex_unlock(&codec->mutex);
+       mutex_unlock(&drvdata->ctrl_lock);
 
        dev_dbg(codec->dev, "%s: Exit\n", __func__);
 
@@ -1198,9 +1198,9 @@ static int anc_status_control_get(struct snd_kcontrol *kcontrol,
        struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
        struct ab8500_codec_drvdata *drvdata = dev_get_drvdata(codec->dev);
 
-       mutex_lock(&codec->mutex);
+       mutex_lock(&drvdata->ctrl_lock);
        ucontrol->value.integer.value[0] = drvdata->anc_status;
-       mutex_unlock(&codec->mutex);
+       mutex_unlock(&drvdata->ctrl_lock);
 
        return 0;
 }
@@ -1217,7 +1217,7 @@ static int anc_status_control_put(struct snd_kcontrol *kcontrol,
 
        dev_dbg(dev, "%s: Enter.\n", __func__);
 
-       mutex_lock(&drvdata->anc_lock);
+       mutex_lock(&drvdata->ctrl_lock);
 
        req = ucontrol->value.integer.value[0];
        if (req >= ARRAY_SIZE(enum_anc_state)) {
@@ -1244,9 +1244,7 @@ static int anc_status_control_put(struct snd_kcontrol *kcontrol,
        }
        snd_soc_dapm_sync(&codec->dapm);
 
-       mutex_lock(&codec->mutex);
        anc_configure(codec, apply_fir, apply_iir);
-       mutex_unlock(&codec->mutex);
 
        if (apply_fir) {
                if (drvdata->anc_status == ANC_IIR_CONFIGURED)
@@ -1265,7 +1263,7 @@ static int anc_status_control_put(struct snd_kcontrol *kcontrol,
        snd_soc_dapm_sync(&codec->dapm);
 
 cleanup:
-       mutex_unlock(&drvdata->anc_lock);
+       mutex_unlock(&drvdata->ctrl_lock);
 
        if (status < 0)
                dev_err(dev, "%s: Unable to configure ANC! (status = %d)\n",
@@ -1294,14 +1292,15 @@ static int filter_control_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
 {
        struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+       struct ab8500_codec_drvdata *drvdata = snd_soc_codec_get_drvdata(codec);
        struct filter_control *fc =
                        (struct filter_control *)kcontrol->private_value;
        unsigned int i;
 
-       mutex_lock(&codec->mutex);
+       mutex_lock(&drvdata->ctrl_lock);
        for (i = 0; i < fc->count; i++)
                ucontrol->value.integer.value[i] = fc->value[i];
-       mutex_unlock(&codec->mutex);
+       mutex_unlock(&drvdata->ctrl_lock);
 
        return 0;
 }
@@ -1310,14 +1309,15 @@ static int filter_control_put(struct snd_kcontrol *kcontrol,
                struct snd_ctl_elem_value *ucontrol)
 {
        struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+       struct ab8500_codec_drvdata *drvdata = snd_soc_codec_get_drvdata(codec);
        struct filter_control *fc =
                        (struct filter_control *)kcontrol->private_value;
        unsigned int i;
 
-       mutex_lock(&codec->mutex);
+       mutex_lock(&drvdata->ctrl_lock);
        for (i = 0; i < fc->count; i++)
                fc->value[i] = ucontrol->value.integer.value[i];
-       mutex_unlock(&codec->mutex);
+       mutex_unlock(&drvdata->ctrl_lock);
 
        return 0;
 }
@@ -2545,7 +2545,7 @@ static int ab8500_codec_probe(struct snd_soc_codec *codec)
 
        (void)snd_soc_dapm_disable_pin(&codec->dapm, "ANC Configure Input");
 
-       mutex_init(&drvdata->anc_lock);
+       mutex_init(&drvdata->ctrl_lock);
 
        return status;
 }