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[4.9,059/157] ALSA: hda: Add missing rwsem around snd_ctl_remove() calls

Message ID 20220124183934.655747009@linuxfoundation.org
State Superseded
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 80bd64af75b4bb11c0329bc66c35da2ddfb66d88 ]

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: d13bd412dce2 ("ALSA: hda - Manage kcontrol lists")
Link: https://lore.kernel.org/r/20211116071314.15065-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/pci/hda/hda_codec.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 4e67614f15f8e..8976da3e1e288 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -1608,8 +1608,11 @@  void snd_hda_ctls_clear(struct hda_codec *codec)
 {
 	int i;
 	struct hda_nid_item *items = codec->mixers.list;
+
+	down_write(&codec->card->controls_rwsem);
 	for (i = 0; i < codec->mixers.used; i++)
 		snd_ctl_remove(codec->card, items[i].kctl);
+	up_write(&codec->card->controls_rwsem);
 	snd_array_free(&codec->mixers);
 	snd_array_free(&codec->nids);
 }