diff mbox series

[4.4,043/114] ALSA: jack: Add missing rwsem around snd_ctl_remove() calls

Message ID 20220124183928.438211582@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Jan. 24, 2022, 6:42 p.m. UTC 
From: Takashi Iwai <tiwai@suse.de>

[ Upstream commit 06764dc931848c3a9bc01a63bbf76a605408bb54 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/core/jack.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/sound/core/jack.c b/sound/core/jack.c
index fcc972fbe8ffd..ecbdac88f95ad 100644
--- a/sound/core/jack.c
+++ b/sound/core/jack.c
@@ -64,10 +64,13 @@  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);