Commit 18c1c3f6 authored Aug 25, 2006 by Takashi Iwai Committed by Jaroslav Kysela Sep 23, 2006

[ALSA] Return error if no user TLV is defined



Retrun error to user TLV_READ ioctl if no TLV is defined.
(Until now, nothing was written and rerunred successfully.)

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

parent 86148e84

sound/core/control.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -951,6 +951,8 @@ static int snd_ctl_elem_user_tlv(struct snd_kcontrol *kcontrol,
		ue->tlv_data = new_data;
		ue->tlv_data_size = size;
		} else {
		if (! ue->tlv_data_size \|\| ! ue->tlv_data)
		return -ENXIO;
		if (size < ue->tlv_data_size)
		return -ENOSPC;
		if (copy_to_user(tlv, ue->tlv_data, ue->tlv_data_size))