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>
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@ -885,6 +885,11 @@ static int snd_ftu_eff_switch_put(struct snd_kcontrol *kctl,
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return changed;
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}
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static void kctl_private_value_free(struct snd_kcontrol *kctl)
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{
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kfree((void *)kctl->private_value);
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}
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static int snd_ftu_create_effect_switch(struct usb_mixer_interface *mixer,
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int validx, int bUnitID)
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{
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@ -919,6 +924,7 @@ static int snd_ftu_create_effect_switch(struct usb_mixer_interface *mixer,
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return -ENOMEM;
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}
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kctl->private_free = kctl_private_value_free;
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err = snd_ctl_add(mixer->chip->card, kctl);
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if (err < 0)
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return err;
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