ALSA: vx222: Use guard() for mutex locks

Replace the manual mutex lock/unlock pairs with guard() for code
simplification.

Only code refactoring, and no behavior change.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250829144342.4290-61-tiwai@suse.de

diff --git a/sound/pci/vx222/vx222_ops.c b/sound/pci/vx222/vx222_ops.c
index 3e7e928b24f8b638a9e11a9d2250aa88a563d926..b6459dbdb1b050187b09de19eb35fc00a61c09d0 100644 (file)
--- a/sound/pci/vx222/vx222_ops.c
+++ b/sound/pci/vx222/vx222_ops.c
@@ -868,10 +868,10 @@ static int vx_input_level_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem
 {
        struct vx_core *_chip = snd_kcontrol_chip(kcontrol);
        struct snd_vx222 *chip = to_vx222(_chip);
-       mutex_lock(&_chip->mixer_mutex);
+
+       guard(mutex)(&_chip->mixer_mutex);
        ucontrol->value.integer.value[0] = chip->input_level[0];
        ucontrol->value.integer.value[1] = chip->input_level[1];
-       mutex_unlock(&_chip->mixer_mutex);
        return 0;
 }
 
@@ -885,16 +885,14 @@ static int vx_input_level_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem
        if (ucontrol->value.integer.value[1] < 0 ||
            ucontrol->value.integer.value[1] > MIC_LEVEL_MAX)
                return -EINVAL;
-       mutex_lock(&_chip->mixer_mutex);
+       guard(mutex)(&_chip->mixer_mutex);
        if (chip->input_level[0] != ucontrol->value.integer.value[0] ||
            chip->input_level[1] != ucontrol->value.integer.value[1]) {
                chip->input_level[0] = ucontrol->value.integer.value[0];
                chip->input_level[1] = ucontrol->value.integer.value[1];
                vx2_set_input_level(chip);
-               mutex_unlock(&_chip->mixer_mutex);
                return 1;
        }
-       mutex_unlock(&_chip->mixer_mutex);
        return 0;
 }
 
@@ -923,14 +921,12 @@ static int vx_mic_level_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_v
        if (ucontrol->value.integer.value[0] < 0 ||
            ucontrol->value.integer.value[0] > MIC_LEVEL_MAX)
                return -EINVAL;
-       mutex_lock(&_chip->mixer_mutex);
+       guard(mutex)(&_chip->mixer_mutex);
        if (chip->mic_level != ucontrol->value.integer.value[0]) {
                chip->mic_level = ucontrol->value.integer.value[0];
                vx2_set_input_level(chip);
-               mutex_unlock(&_chip->mixer_mutex);
                return 1;
        }
-       mutex_unlock(&_chip->mixer_mutex);
        return 0;
 }