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ALSA: usb-audio: Fix memory leak in FTU quirk 

M-audio FastTrack Ultra quirk doesn't release the kzalloc'ed memory.
This patch adds the private_free callback to release it properly.

Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2014-11-11 15:45:57 +01:00
parent b456591346
commit 1a290581de
1 changed files with 6 additions and 0 deletions
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6
sound/usb/mixer_quirks.c
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@ -885,6 +885,11 @@ static int snd_ftu_eff_switch_put(struct snd_kcontrol *kctl,
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(struct usb_mixer_interface *mixer,
return -ENOMEM;
}
kctl->private_free = kctl_private_value_free;
err = snd_ctl_add(mixer->chip->card, kctl);
if (err < 0)
return err;