linux-kernel - [PATCH 3.16 230/305] ALSA: control: fix failure to return numerical ID in 'add' event

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Date:   Sun, 03 Feb 2019 14:45:08 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Takashi Iwai" <tiwai@...e.de>,
        "Takashi Sakamoto" <o-takashi@...amocchi.jp>
Subject: [PATCH 3.16 230/305] ALSA: control: fix failure to return
 numerical ID in 'add' event

3.16.63-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Sakamoto <o-takashi@...amocchi.jp>

commit d34890cf4113397625a6629d71749fa638a7a734 upstream.

Currently when adding a new control, the assigned numerical ID is not
set for event data, thus userspace applications cannot realize it just
by event data.

Signed-off-by: Takashi Sakamoto <o-takashi@...amocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 sound/core/control.c | 1 +
 1 file changed, 1 insertion(+)

--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -368,6 +368,7 @@ int snd_ctl_add(struct snd_card *card, s
 	card->controls_count += kcontrol->count;
 	kcontrol->id.numid = card->last_numid + 1;
 	card->last_numid += kcontrol->count;
+	id = kcontrol->id;
 	count = kcontrol->count;
 	up_write(&card->controls_rwsem);
 	for (idx = 0; idx < count; idx++, id.index++, id.numid++)