diff --git a/sound/core/control.c b/sound/core/control.c index a41d19c46df2..9c933350ec6b 100644 --- a/sound/core/control.c +++ b/sound/core/control.c @@ -39,6 +39,9 @@ static LIST_HEAD(snd_control_compat_ioctls); #endif static struct snd_ctl_layer_ops *snd_ctl_layer; +static int snd_ctl_remove_locked(struct snd_card *card, + struct snd_kcontrol *kcontrol); + static int snd_ctl_open(struct inode *inode, struct file *file) { unsigned long flags; @@ -483,7 +486,7 @@ static int __snd_ctl_add_replace(struct snd_card *card, return -EBUSY; } - err = snd_ctl_remove(card, old); + err = snd_ctl_remove_locked(card, old); if (err < 0) return err; } @@ -589,20 +592,32 @@ static int __snd_ctl_remove(struct snd_card *card, return 0; } +static inline int snd_ctl_remove_locked(struct snd_card *card, + struct snd_kcontrol *kcontrol) +{ + return __snd_ctl_remove(card, kcontrol, true); +} + /** * snd_ctl_remove - remove the control from the card and release it * @card: the card instance * @kcontrol: the control instance to remove * * Removes the control from the card and then releases the instance. - * You don't need to call snd_ctl_free_one(). You must be in - * the write lock - down_write(&card->controls_rwsem). + * You don't need to call snd_ctl_free_one(). * * Return: 0 if successful, or a negative error code on failure. + * + * Note that this function takes card->controls_rwsem lock internally. */ int snd_ctl_remove(struct snd_card *card, struct snd_kcontrol *kcontrol) { - return __snd_ctl_remove(card, kcontrol, true); + int ret; + + down_write(&card->controls_rwsem); + ret = snd_ctl_remove_locked(card, kcontrol); + up_write(&card->controls_rwsem); + return ret; } EXPORT_SYMBOL(snd_ctl_remove); @@ -627,7 +642,7 @@ int snd_ctl_remove_id(struct snd_card *card, struct snd_ctl_elem_id *id) up_write(&card->controls_rwsem); return -ENOENT; } - ret = snd_ctl_remove(card, kctl); + ret = snd_ctl_remove_locked(card, kctl); up_write(&card->controls_rwsem); return ret; } @@ -665,7 +680,7 @@ static int snd_ctl_remove_user_ctl(struct snd_ctl_file * file, ret = -EBUSY; goto error; } - ret = snd_ctl_remove(card, kctl); + ret = snd_ctl_remove_locked(card, kctl); error: up_write(&card->controls_rwsem); return ret; diff --git a/sound/core/jack.c b/sound/core/jack.c index 03d155ed362b..e0f034e7275c 100644 --- a/sound/core/jack.c +++ b/sound/core/jack.c @@ -66,12 +66,10 @@ 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); diff --git a/sound/core/pcm.c b/sound/core/pcm.c index 9d95e3731123..1c0bb3a07bff 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -814,9 +814,7 @@ static void free_chmap(struct snd_pcm_str *pstr) if (pstr->chmap_kctl) { struct snd_card *card = pstr->pcm->card; - down_write(&card->controls_rwsem); snd_ctl_remove(card, pstr->chmap_kctl); - up_write(&card->controls_rwsem); pstr->chmap_kctl = NULL; } } diff --git a/sound/isa/sb/emu8000.c b/sound/isa/sb/emu8000.c index e02029677743..a6405772d537 100644 --- a/sound/isa/sb/emu8000.c +++ b/sound/isa/sb/emu8000.c @@ -1040,10 +1040,8 @@ snd_emu8000_create_mixer(struct snd_card *card, struct snd_emu8000 *emu) __error: for (i = 0; i < EMU8000_NUM_CONTROLS; i++) { - down_write(&card->controls_rwsem); if (emu->controls[i]) snd_ctl_remove(card, emu->controls[i]); - up_write(&card->controls_rwsem); } return err; } diff --git a/sound/isa/sb/sb16_csp.c b/sound/isa/sb/sb16_csp.c index 7ad8c5f7b664..8d8357019719 100644 --- a/sound/isa/sb/sb16_csp.c +++ b/sound/isa/sb/sb16_csp.c @@ -1080,7 +1080,6 @@ static void snd_sb_qsound_destroy(struct snd_sb_csp * p) card = p->chip->card; - down_write(&card->controls_rwsem); if (p->qsound_switch) { snd_ctl_remove(card, p->qsound_switch); p->qsound_switch = NULL; @@ -1089,7 +1088,6 @@ static void snd_sb_qsound_destroy(struct snd_sb_csp * p) snd_ctl_remove(card, p->qsound_space); p->qsound_space = NULL; } - up_write(&card->controls_rwsem); /* cancel pending transfer of QSound parameters */ spin_lock_irqsave (&p->q_lock, flags); diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c index 9904bcfee106..70c8252a92d9 100644 --- a/sound/pci/emu10k1/emufx.c +++ b/sound/pci/emu10k1/emufx.c @@ -977,11 +977,9 @@ static int snd_emu10k1_del_controls(struct snd_emu10k1 *emu, in_kernel); if (err < 0) return err; - down_write(&card->controls_rwsem); ctl = snd_emu10k1_look_for_ctl(emu, &id); if (ctl) snd_ctl_remove(card, ctl->kcontrol); - up_write(&card->controls_rwsem); } return 0; } diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index bd19f92aeeec..33af707a65ab 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -1769,10 +1769,8 @@ 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); } diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c index 8add361e87c6..03ec3c5adc3a 100644 --- a/sound/soc/soc-topology.c +++ b/sound/soc/soc-topology.c @@ -2564,7 +2564,6 @@ EXPORT_SYMBOL_GPL(snd_soc_tplg_component_load); /* remove dynamic controls from the component driver */ int snd_soc_tplg_component_remove(struct snd_soc_component *comp) { - struct snd_card *card = comp->card->snd_card; struct snd_soc_dobj *dobj, *next_dobj; int pass; @@ -2572,7 +2571,6 @@ int snd_soc_tplg_component_remove(struct snd_soc_component *comp) for (pass = SOC_TPLG_PASS_END; pass >= SOC_TPLG_PASS_START; pass--) { /* remove mixer controls */ - down_write(&card->controls_rwsem); list_for_each_entry_safe(dobj, next_dobj, &comp->dobj_list, list) { @@ -2607,7 +2605,6 @@ int snd_soc_tplg_component_remove(struct snd_soc_component *comp) break; } } - up_write(&card->controls_rwsem); } /* let caller know if FW can be freed when no objects are left */