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From: Takashi Iwai <tiwai@suse.de>
To: alsa-devel@alsa-project.org
Subject: [PATCH 1/3] ALSA: jack: Add missing rwsem around snd_ctl_remove() calls
Date: Tue, 16 Nov 2021 08:13:12 +0100	[thread overview]
Message-ID: <20211116071314.15065-1-tiwai@suse.de> (raw)

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")
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


             reply	other threads:[~2021-11-16  7:14 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-16  7:13 Takashi Iwai [this message]
2021-11-16  7:13 ` [PATCH 2/3] ALSA: PCM: Add missing rwsem around snd_ctl_remove() calls Takashi Iwai
2021-11-16  7:13 ` [PATCH 3/3] ALSA: hda: " Takashi Iwai

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