[PATCH 05/11] ALSA: scarlett2: Add clamp() in scarlett2_mixer_ctl_put()

["Geoffrey D. Bennett" <g@xxxxx>]

Ensure the value passed to scarlett2_mixer_ctl_put() is between 0 and
SCARLETT2_MIXER_MAX_VALUE so we don't attempt to access outside
scarlett2_mixer_values[].

Signed-off-by: Geoffrey D. Bennett <g@xxxxx>
Fixes: 9e4d5c1be21f ("ALSA: usb-audio: Scarlett Gen 2 mixer interface")
---
 sound/usb/mixer_scarlett2.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/usb/mixer_scarlett2.c b/sound/usb/mixer_scarlett2.c
index 373911937487..f1636a1614da 100644
--- a/sound/usb/mixer_scarlett2.c
+++ b/sound/usb/mixer_scarlett2.c
@@ -3663,7 +3663,8 @@ static int scarlett2_mixer_ctl_put(struct snd_kcontrol *kctl,
 	mutex_lock(&private->data_mutex);
 
 	oval = private->mix[index];
-	val = ucontrol->value.integer.value[0];
+	val = clamp(ucontrol->value.integer.value[0],
+		    0L, (long)SCARLETT2_MIXER_MAX_VALUE);
 	num_mixer_in = port_count[SCARLETT2_PORT_TYPE_MIX][SCARLETT2_PORT_OUT];
 	mix_num = index / num_mixer_in;
 
-- 
2.43.0