3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <ti...@suse.de>

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 <ti...@suse.de>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 sound/usb/mixer_quirks.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -885,6 +885,11 @@ static int snd_ftu_eff_switch_put(struct
        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)
 {
@@ -919,6 +924,7 @@ static int snd_ftu_create_effect_switch(
                return -ENOMEM;
        }
 
+       kctl->private_free = kctl_private_value_free;
        err = snd_ctl_add(mixer->chip->card, kctl);
        if (err < 0)
                return err;


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