From da4288287b68fe6902629f4e5306aba2a554bc4b Mon Sep 17 00:00:00 2001
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Date: Thu, 24 Aug 2017 10:46:15 +0900
Subject: [PATCH] ALSA: control: queue TLV event for a set of user-defined element
Git-commit: da4288287b68fe6902629f4e5306aba2a554bc4b
Patch-mainline: v4.14-rc1
References: bsc#1121278
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>
---
sound/core/control.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
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;
}
--
2.20.1