As scarlett2_meter_ctl_get() uses meter_level_map[], the data_mutex should be locked while accessing it.
Signed-off-by: Geoffrey D. Bennett g@b4.vu Fixes: 2b17abb0dec4 ("ALSA: scarlett2: Remap Level Meter values") --- sound/usb/mixer_scarlett2.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/sound/usb/mixer_scarlett2.c b/sound/usb/mixer_scarlett2.c index f1636a1614da..73f5badceb19 100644 --- a/sound/usb/mixer_scarlett2.c +++ b/sound/usb/mixer_scarlett2.c @@ -3880,10 +3880,12 @@ static int scarlett2_meter_ctl_get(struct snd_kcontrol *kctl, u16 meter_levels[SCARLETT2_MAX_METERS]; int i, err;
+ mutex_lock(&private->data_mutex); + err = scarlett2_usb_get_meter_levels(elem->head.mixer, elem->channels, meter_levels); if (err < 0) - return err; + goto unlock;
/* copy & translate from meter_levels[] using meter_level_map[] */ for (i = 0; i < elem->channels; i++) { @@ -3898,7 +3900,10 @@ static int scarlett2_meter_ctl_get(struct snd_kcontrol *kctl, ucontrol->value.integer.value[i] = value; }
- return 0; +unlock: + mutex_unlock(&private->data_mutex); + + return err; }
static const struct snd_kcontrol_new scarlett2_meter_ctl = {