Commit 6123637f authored by Clemens Ladisch's avatar Clemens Ladisch Committed by Jaroslav Kysela

sound: control: fix minimum TLV length

Allow TLV blocks that do not have any values; the smallest possible TLV
is an empty container or one where the information is only in the tag.
Signed-off-by: default avatarClemens Ladisch <clemens@ladisch.de>
Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>
parent a75d7a4c
......@@ -1100,7 +1100,7 @@ static int snd_ctl_tlv_ioctl(struct snd_ctl_file *file,
if (copy_from_user(&tlv, _tlv, sizeof(tlv)))
return -EFAULT;
if (tlv.length < sizeof(unsigned int) * 3)
if (tlv.length < sizeof(unsigned int) * 2)
return -EINVAL;
down_read(&card->controls_rwsem);
kctl = snd_ctl_find_numid(card, tlv.numid);
......
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