Commit 1a290581 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

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: default avatarTakashi Iwai <tiwai@suse.de>
parent b4565913

sound/usb/mixer_quirks.c

+6 −0
Original line number Diff line number Diff line
@@ -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;