[PATCH 4.4 12/52] ASoC: topology: Add missing rwsem around snd_ctl_remove() calls

From: Takashi Iwai tiwai@suse.de

[ Upstream commit 7e567b5ae06315ef2d70666b149962e2bb4b97af ]

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: 8a9782346dcc ("ASoC: topology: Add topology core") Signed-off-by: Takashi Iwai tiwai@suse.de Link: https://lore.kernel.org/r/20211116071812.18109-1-tiwai@suse.de Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/soc-topology.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c index 0675ab3fec6c7..ff12f2aa4e51d 100644 --- a/sound/soc/soc-topology.c +++ b/sound/soc/soc-topology.c @@ -1831,6 +1831,7 @@ EXPORT_SYMBOL_GPL(snd_soc_tplg_widget_remove_all); /* remove dynamic controls from the component driver */ int snd_soc_tplg_component_remove(struct snd_soc_component *comp, u32 index) { + struct snd_card *card = comp->card->snd_card; struct snd_soc_dobj *dobj, *next_dobj; int pass = SOC_TPLG_PASS_END;

@@ -1838,6 +1839,7 @@ int snd_soc_tplg_component_remove(struct snd_soc_component *comp, u32 index) while (pass >= SOC_TPLG_PASS_START) {

/* remove mixer controls */ + down_write(&card->controls_rwsem); list_for_each_entry_safe(dobj, next_dobj, &comp->dobj_list, list) {

@@ -1870,6 +1872,7 @@ int snd_soc_tplg_component_remove(struct snd_soc_component *comp, u32 index) break; } } + up_write(&card->controls_rwsem); pass--; }