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ALSA: control: queue TLV event for a set of user-defined element 

In a design of user-defined element set, applications allow to change TLV
data on the set. This operation doesn't only affects to a target element,
but also to elements in the set.

This commit generates TLV event for all of elements in the set when the TLV
data is changed.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2017-08-24 10:46:15 +09:00 committed by Takashi Iwai
parent fb8027ebfd
commit da4288287b
1 changed files with 6 additions and 1 deletions
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7
sound/core/control.c
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@ -1117,6 +1117,8 @@ static int replace_user_tlv(struct snd_kcontrol *kctl, unsigned int __user *buf,
{
struct user_element *ue = kctl->private_data;
unsigned int *container;
struct snd_ctl_elem_id id;
int i;
int change;
if (size > 1024 * 128) /* sane value */
@ -1138,7 +1140,10 @@ static int replace_user_tlv(struct snd_kcontrol *kctl, unsigned int __user *buf,
ue->tlv_data = container;
ue->tlv_data_size = size;
snd_ctl_notify(ue->card, SNDRV_CTL_EVENT_MASK_TLV, &kctl->id);
for (i = 0; i < kctl->count; ++i) {
snd_ctl_build_ioff(&id, kctl, i);
snd_ctl_notify(ue->card, SNDRV_CTL_EVENT_MASK_TLV, &id);
}
return change;
}