ALSA: usb-audio: Fix memory leak in FTU quirk
commit 1a290581ded60e87276741f8ca97b161d2b226fc upstream.
M-audio FastTrack Ultra quirk doesn't release the kzalloc'ed memory.
This patch adds the private_free callback to release it properly.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index ebe9144..c89a5bf 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -799,6 +799,11 @@
return changed;
}
+static void kctl_private_value_free(struct snd_kcontrol *kctl)
+{
+ kfree((void *)kctl->private_value);
+}
+
static int snd_ftu_create_effect_switch(struct usb_mixer_interface *mixer,
int validx, int bUnitID)
{
@@ -833,6 +838,7 @@
return -ENOMEM;
}
+ kctl->private_free = kctl_private_value_free;
err = snd_ctl_add(mixer->chip->card, kctl);
if (err < 0)
return err;