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>

1 files changed, 6 insertions, 1 deletions

diff --git a/sound/core/control.c b/sound/core/control.c
index d6a8502da828..6ddffe85126f 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -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;
 }