From 06764dc931848c3a9bc01a63bbf76a605408bb54 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 16 Nov 2021 08:13:12 +0100
Subject: [PATCH] ALSA: jack: Add missing rwsem around snd_ctl_remove() calls
Git-commit: 06764dc931848c3a9bc01a63bbf76a605408bb54
Patch-mainline: v5.17-rc1
References: git-fixes

snd_ctl_remove() has to be called with card->controls_rwsem held (when
called after the card instantiation).  This patch add the missing
rwsem calls around it.

Fixes: 9058cbe1eed2 ("ALSA: jack: implement kctl creating for jack devices")
Link: https://lore.kernel.org/r/20211116071314.15065-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/core/jack.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/core/jack.c b/sound/core/jack.c
index 32350c6aba84..f50a1e920e1d 100644
--- a/sound/core/jack.c
+++ b/sound/core/jack.c
@@ -62,10 +62,13 @@ static int snd_jack_dev_free(struct snd_device *device)
 	struct snd_card *card = device->card;
 	struct snd_jack_kctl *jack_kctl, *tmp_jack_kctl;
 
+	down_write(&card->controls_rwsem);
 	list_for_each_entry_safe(jack_kctl, tmp_jack_kctl, &jack->kctl_list, list) {
 		list_del_init(&jack_kctl->list);
 		snd_ctl_remove(card, jack_kctl->kctl);
 	}
+	up_write(&card->controls_rwsem);
+
 	if (jack->private_free)
 		jack->private_free(jack);
 
-- 
2.31.1