diff options
Diffstat (limited to 'sound/core/init.c')
| -rw-r--r-- | sound/core/init.c | 433 |
1 files changed, 238 insertions, 195 deletions
diff --git a/sound/core/init.c b/sound/core/init.c index 3e65da21a08..7bdfd19e24a 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -21,11 +21,14 @@ #include <linux/init.h> #include <linux/sched.h> +#include <linux/module.h> +#include <linux/device.h> #include <linux/file.h> #include <linux/slab.h> #include <linux/time.h> #include <linux/ctype.h> #include <linux/pm.h> +#include <linux/completion.h> #include <sound/core.h> #include <sound/control.h> @@ -44,7 +47,8 @@ static LIST_HEAD(shutdown_files); static const struct file_operations snd_shutdown_f_ops; -static unsigned int snd_cards_lock; /* locked for registering/using */ +/* locked for registering/using */ +static DECLARE_BITMAP(snd_cards_lock, SNDRV_CARDS); struct snd_card *snd_cards[SNDRV_CARDS]; EXPORT_SYMBOL(snd_cards); @@ -63,7 +67,7 @@ static int module_slot_match(struct module *module, int idx) #ifdef MODULE const char *s1, *s2; - if (!module || !module->name || !slots[idx]) + if (!module || !*module->name || !slots[idx]) return 0; s1 = module->name; @@ -91,7 +95,7 @@ static int module_slot_match(struct module *module, int idx) return match; } -#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) +#if IS_ENABLED(CONFIG_SND_MIXER_OSS) int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int free_flag); EXPORT_SYMBOL(snd_mixer_oss_notify_callback); #endif @@ -109,11 +113,11 @@ static inline int init_info_for_card(struct snd_card *card) struct snd_info_entry *entry; if ((err = snd_info_card_register(card)) < 0) { - snd_printd("unable to create card info\n"); + dev_dbg(card->dev, "unable to create card info\n"); return err; } if ((entry = snd_info_create_card_entry(card, "id", card->proc_root)) == NULL) { - snd_printd("unable to create card entry\n"); + dev_dbg(card->dev, "unable to create card entry\n"); return err; } entry->c.text.read = snd_card_id_read; @@ -128,8 +132,42 @@ static inline int init_info_for_card(struct snd_card *card) #define init_info_for_card(card) #endif +static int check_empty_slot(struct module *module, int slot) +{ + return !slots[slot] || !*slots[slot]; +} + +/* return an empty slot number (>= 0) found in the given bitmask @mask. + * @mask == -1 == 0xffffffff means: take any free slot up to 32 + * when no slot is available, return the original @mask as is. + */ +static int get_slot_from_bitmask(int mask, int (*check)(struct module *, int), + struct module *module) +{ + int slot; + + for (slot = 0; slot < SNDRV_CARDS; slot++) { + if (slot < 32 && !(mask & (1U << slot))) + continue; + if (!test_bit(slot, snd_cards_lock)) { + if (check(module, slot)) + return slot; /* found */ + } + } + return mask; /* unchanged */ +} + +static int snd_card_do_free(struct snd_card *card); +static const struct attribute_group *card_dev_attr_groups[]; + +static void release_card_device(struct device *dev) +{ + snd_card_do_free(dev_to_snd_card(dev)); +} + /** - * snd_card_create - create and initialize a soundcard structure + * snd_card_new - create and initialize a soundcard structure + * @parent: the parent device object * @idx: card index (address) [0 ... (SNDRV_CARDS-1)] * @xid: card identification (ASCII string) * @module: top level module for locking @@ -142,14 +180,14 @@ static inline int init_info_for_card(struct snd_card *card) * space for the driver to use freely. The allocated struct is stored * in the given card_ret pointer. * - * Returns zero if successful or a negative error code. + * Return: Zero if successful or a negative error code. */ -int snd_card_create(int idx, const char *xid, +int snd_card_new(struct device *parent, int idx, const char *xid, struct module *module, int extra_size, struct snd_card **card_ret) { struct snd_card *card; - int err, idx2; + int err; if (snd_BUG_ON(!card_ret)) return -EINVAL; @@ -160,85 +198,81 @@ int snd_card_create(int idx, const char *xid, card = kzalloc(sizeof(*card) + extra_size, GFP_KERNEL); if (!card) return -ENOMEM; + if (extra_size > 0) + card->private_data = (char *)card + sizeof(struct snd_card); if (xid) strlcpy(card->id, xid, sizeof(card->id)); err = 0; mutex_lock(&snd_card_mutex); - if (idx < 0) { - for (idx2 = 0; idx2 < SNDRV_CARDS; idx2++) - /* idx == -1 == 0xffff means: take any free slot */ - if (~snd_cards_lock & idx & 1<<idx2) { - if (module_slot_match(module, idx2)) { - idx = idx2; - break; - } - } - } - if (idx < 0) { - for (idx2 = 0; idx2 < SNDRV_CARDS; idx2++) - /* idx == -1 == 0xffff means: take any free slot */ - if (~snd_cards_lock & idx & 1<<idx2) { - if (!slots[idx2] || !*slots[idx2]) { - idx = idx2; - break; - } - } - } + if (idx < 0) /* first check the matching module-name slot */ + idx = get_slot_from_bitmask(idx, module_slot_match, module); + if (idx < 0) /* if not matched, assign an empty slot */ + idx = get_slot_from_bitmask(idx, check_empty_slot, module); if (idx < 0) err = -ENODEV; else if (idx < snd_ecards_limit) { - if (snd_cards_lock & (1 << idx)) + if (test_bit(idx, snd_cards_lock)) err = -EBUSY; /* invalid */ } else if (idx >= SNDRV_CARDS) err = -ENODEV; if (err < 0) { mutex_unlock(&snd_card_mutex); - snd_printk(KERN_ERR "cannot find the slot for index %d (range 0-%i), error: %d\n", + dev_err(parent, "cannot find the slot for index %d (range 0-%i), error: %d\n", idx, snd_ecards_limit - 1, err); - goto __error; + kfree(card); + return err; } - snd_cards_lock |= 1 << idx; /* lock it */ + set_bit(idx, snd_cards_lock); /* lock it */ if (idx >= snd_ecards_limit) snd_ecards_limit = idx + 1; /* increase the limit */ mutex_unlock(&snd_card_mutex); + card->dev = parent; card->number = idx; card->module = module; INIT_LIST_HEAD(&card->devices); init_rwsem(&card->controls_rwsem); rwlock_init(&card->ctl_files_rwlock); + mutex_init(&card->user_ctl_lock); INIT_LIST_HEAD(&card->controls); INIT_LIST_HEAD(&card->ctl_files); spin_lock_init(&card->files_lock); INIT_LIST_HEAD(&card->files_list); - init_waitqueue_head(&card->shutdown_sleep); #ifdef CONFIG_PM mutex_init(&card->power_lock); init_waitqueue_head(&card->power_sleep); #endif + + device_initialize(&card->card_dev); + card->card_dev.parent = parent; + card->card_dev.class = sound_class; + card->card_dev.release = release_card_device; + card->card_dev.groups = card_dev_attr_groups; + err = kobject_set_name(&card->card_dev.kobj, "card%d", idx); + if (err < 0) + goto __error; + /* the control interface cannot be accessed from the user space until */ /* snd_cards_bitmask and snd_cards are set with snd_card_register */ err = snd_ctl_create(card); if (err < 0) { - snd_printk(KERN_ERR "unable to register control minors\n"); + dev_err(parent, "unable to register control minors\n"); goto __error; } err = snd_info_card_create(card); if (err < 0) { - snd_printk(KERN_ERR "unable to create card info\n"); + dev_err(parent, "unable to create card info\n"); goto __error_ctl; } - if (extra_size > 0) - card->private_data = (char *)card + sizeof(struct snd_card); *card_ret = card; return 0; __error_ctl: - snd_device_free_all(card, SNDRV_DEV_CMD_PRE); + snd_device_free_all(card); __error: - kfree(card); + put_device(&card->card_dev); return err; } -EXPORT_SYMBOL(snd_card_create); +EXPORT_SYMBOL(snd_card_new); /* return non-zero if a card is already locked */ int snd_card_locked(int card) @@ -246,7 +280,7 @@ int snd_card_locked(int card) int locked; mutex_lock(&snd_card_mutex); - locked = snd_cards_lock & (1 << card); + locked = test_bit(card, snd_cards_lock); mutex_unlock(&snd_card_mutex); return locked; } @@ -334,7 +368,7 @@ static const struct file_operations snd_shutdown_f_ops = * * Disconnects all APIs from the file-operations (user space). * - * Returns zero, otherwise a negative error code. + * Return: Zero, otherwise a negative error code. * * Note: The current implementation replaces all active file->f_op with special * dummy file operations (they do nothing except release). @@ -342,7 +376,6 @@ static const struct file_operations snd_shutdown_f_ops = int snd_card_disconnect(struct snd_card *card) { struct snd_monitor_file *mfile; - struct file *file; int err; if (!card) @@ -359,15 +392,13 @@ int snd_card_disconnect(struct snd_card *card) /* phase 1: disable fops (user space) operations for ALSA API */ mutex_lock(&snd_card_mutex); snd_cards[card->number] = NULL; - snd_cards_lock &= ~(1 << card->number); + clear_bit(card->number, snd_cards_lock); mutex_unlock(&snd_card_mutex); /* phase 2: replace file->f_op with special dummy operations */ spin_lock(&card->files_lock); list_for_each_entry(mfile, &card->files_list, list) { - file = mfile->file; - /* it's critical part, use endless loop */ /* we have no room to fail */ mfile->disconnected_f_op = mfile->file->f_op; @@ -384,7 +415,7 @@ int snd_card_disconnect(struct snd_card *card) /* phase 3: notify all connected devices about disconnection */ /* at this point, they cannot respond to any calls except release() */ -#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) +#if IS_ENABLED(CONFIG_SND_MIXER_OSS) if (snd_mixer_oss_notify_callback) snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_DISCONNECT); #endif @@ -392,12 +423,12 @@ int snd_card_disconnect(struct snd_card *card) /* notify all devices that we are disconnected */ err = snd_device_disconnect_all(card); if (err < 0) - snd_printk(KERN_ERR "not all devices for card %i can be disconnected\n", card->number); + dev_err(card->dev, "not all devices for card %i can be disconnected\n", card->number); snd_info_card_disconnect(card); - if (card->card_dev) { - device_unregister(card->card_dev); - card->card_dev = NULL; + if (card->registered) { + device_del(&card->card_dev); + card->registered = false; } #ifdef CONFIG_PM wake_up(&card->power_sleep); @@ -415,141 +446,149 @@ EXPORT_SYMBOL(snd_card_disconnect); * devices automatically. That is, you don't have to release the devices * by yourself. * - * Returns zero. Frees all associated devices and frees the control + * Return: Zero. Frees all associated devices and frees the control * interface associated to given soundcard. */ static int snd_card_do_free(struct snd_card *card) { -#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) +#if IS_ENABLED(CONFIG_SND_MIXER_OSS) if (snd_mixer_oss_notify_callback) snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_FREE); #endif - if (snd_device_free_all(card, SNDRV_DEV_CMD_PRE) < 0) { - snd_printk(KERN_ERR "unable to free all devices (pre)\n"); - /* Fatal, but this situation should never occur */ - } - if (snd_device_free_all(card, SNDRV_DEV_CMD_NORMAL) < 0) { - snd_printk(KERN_ERR "unable to free all devices (normal)\n"); - /* Fatal, but this situation should never occur */ - } - if (snd_device_free_all(card, SNDRV_DEV_CMD_POST) < 0) { - snd_printk(KERN_ERR "unable to free all devices (post)\n"); - /* Fatal, but this situation should never occur */ - } + snd_device_free_all(card); if (card->private_free) card->private_free(card); snd_info_free_entry(card->proc_id); if (snd_info_card_free(card) < 0) { - snd_printk(KERN_WARNING "unable to free card info\n"); + dev_warn(card->dev, "unable to free card info\n"); /* Not fatal error */ } + if (card->release_completion) + complete(card->release_completion); kfree(card); return 0; } int snd_card_free_when_closed(struct snd_card *card) { - int free_now = 0; int ret = snd_card_disconnect(card); if (ret) return ret; - - spin_lock(&card->files_lock); - if (list_empty(&card->files_list)) - free_now = 1; - else - card->free_on_last_close = 1; - spin_unlock(&card->files_lock); - - if (free_now) - snd_card_do_free(card); + put_device(&card->card_dev); return 0; } - EXPORT_SYMBOL(snd_card_free_when_closed); int snd_card_free(struct snd_card *card) { - int ret = snd_card_disconnect(card); + struct completion released; + int ret; + + init_completion(&released); + card->release_completion = &released; + ret = snd_card_free_when_closed(card); if (ret) return ret; - /* wait, until all devices are ready for the free operation */ - wait_event(card->shutdown_sleep, list_empty(&card->files_list)); - snd_card_do_free(card); + wait_for_completion(&released); return 0; } - EXPORT_SYMBOL(snd_card_free); -static void snd_card_set_id_no_lock(struct snd_card *card, const char *nid) +/* retrieve the last word of shortname or longname */ +static const char *retrieve_id_from_card_name(const char *name) { - int i, len, idx_flag = 0, loops = SNDRV_CARDS; - const char *spos, *src; + const char *spos = name; + + while (*name) { + if (isspace(*name) && isalnum(name[1])) + spos = name + 1; + name++; + } + return spos; +} + +/* return true if the given id string doesn't conflict any other card ids */ +static bool card_id_ok(struct snd_card *card, const char *id) +{ + int i; + if (!snd_info_check_reserved_words(id)) + return false; + for (i = 0; i < snd_ecards_limit; i++) { + if (snd_cards[i] && snd_cards[i] != card && + !strcmp(snd_cards[i]->id, id)) + return false; + } + return true; +} + +/* copy to card->id only with valid letters from nid */ +static void copy_valid_id_string(struct snd_card *card, const char *src, + const char *nid) +{ + char *id = card->id; + + while (*nid && !isalnum(*nid)) + nid++; + if (isdigit(*nid)) + *id++ = isalpha(*src) ? *src : 'D'; + while (*nid && (size_t)(id - card->id) < sizeof(card->id) - 1) { + if (isalnum(*nid)) + *id++ = *nid; + nid++; + } + *id = 0; +} + +/* Set card->id from the given string + * If the string conflicts with other ids, add a suffix to make it unique. + */ +static void snd_card_set_id_no_lock(struct snd_card *card, const char *src, + const char *nid) +{ + int len, loops; + bool is_default = false; char *id; - if (nid == NULL) { - id = card->shortname; - spos = src = id; - while (*id != '\0') { - if (*id == ' ') - spos = id + 1; - id++; - } - } else { - spos = src = nid; - } + copy_valid_id_string(card, src, nid); id = card->id; - while (*spos != '\0' && !isalnum(*spos)) - spos++; - if (isdigit(*spos)) - *id++ = isalpha(src[0]) ? src[0] : 'D'; - while (*spos != '\0' && (size_t)(id - card->id) < sizeof(card->id) - 1) { - if (isalnum(*spos)) - *id++ = *spos; - spos++; + + again: + /* use "Default" for obviously invalid strings + * ("card" conflicts with proc directories) + */ + if (!*id || !strncmp(id, "card", 4)) { + strcpy(id, "Default"); + is_default = true; } - *id = '\0'; - id = card->id; - - if (*id == '\0') - strcpy(id, "default"); + len = strlen(id); + for (loops = 0; loops < SNDRV_CARDS; loops++) { + char *spos; + char sfxstr[5]; /* "_012" */ + int sfxlen; - while (1) { - if (loops-- == 0) { - snd_printk(KERN_ERR "unable to set card id (%s)\n", id); - strcpy(card->id, card->proc_root->name); - return; - } - if (!snd_info_check_reserved_words(id)) - goto __change; - for (i = 0; i < snd_ecards_limit; i++) { - if (snd_cards[i] && !strcmp(snd_cards[i]->id, id)) - goto __change; - } - break; - - __change: - len = strlen(id); - if (idx_flag) { - if (id[len-1] != '9') - id[len-1]++; - else - id[len-1] = 'A'; - } else if ((size_t)len <= sizeof(card->id) - 3) { - strcat(id, "_1"); - idx_flag++; - } else { - spos = id + len - 2; - if ((size_t)len <= sizeof(card->id) - 2) - spos++; - *(char *)spos++ = '_'; - *(char *)spos++ = '1'; - *(char *)spos++ = '\0'; - idx_flag++; - } + if (card_id_ok(card, id)) + return; /* OK */ + + /* Add _XYZ suffix */ + sprintf(sfxstr, "_%X", loops + 1); + sfxlen = strlen(sfxstr); + if (len + sfxlen >= sizeof(card->id)) + spos = id + sizeof(card->id) - sfxlen - 1; + else + spos = id + len; + strcpy(spos, sfxstr); + } + /* fallback to the default id */ + if (!is_default) { + *id = 0; + goto again; } + /* last resort... */ + dev_err(card->dev, "unable to set card id (%s)\n", id); + if (card->proc_root->name) + strlcpy(card->id, card->proc_root->name, sizeof(card->id)); } /** @@ -566,7 +605,7 @@ void snd_card_set_id(struct snd_card *card, const char *nid) if (card->id[0] != '\0') return; mutex_lock(&snd_card_mutex); - snd_card_set_id_no_lock(card, nid); + snd_card_set_id_no_lock(card, nid, nid); mutex_unlock(&snd_card_mutex); } EXPORT_SYMBOL(snd_card_set_id); @@ -575,15 +614,15 @@ static ssize_t card_id_show_attr(struct device *dev, struct device_attribute *attr, char *buf) { - struct snd_card *card = dev_get_drvdata(dev); - return snprintf(buf, PAGE_SIZE, "%s\n", card ? card->id : "(null)"); + struct snd_card *card = container_of(dev, struct snd_card, card_dev); + return snprintf(buf, PAGE_SIZE, "%s\n", card->id); } static ssize_t card_id_store_attr(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct snd_card *card = dev_get_drvdata(dev); + struct snd_card *card = container_of(dev, struct snd_card, card_dev); char buf1[sizeof(card->id)]; size_t copy = count > sizeof(card->id) - 1 ? sizeof(card->id) - 1 : count; @@ -598,40 +637,43 @@ card_id_store_attr(struct device *dev, struct device_attribute *attr, memcpy(buf1, buf, copy); buf1[copy] = '\0'; mutex_lock(&snd_card_mutex); - if (!snd_info_check_reserved_words(buf1)) { - __exist: + if (!card_id_ok(NULL, buf1)) { mutex_unlock(&snd_card_mutex); return -EEXIST; } - for (idx = 0; idx < snd_ecards_limit; idx++) { - if (snd_cards[idx] && !strcmp(snd_cards[idx]->id, buf1)) { - if (card == snd_cards[idx]) - goto __ok; - else - goto __exist; - } - } strcpy(card->id, buf1); snd_info_card_id_change(card); -__ok: mutex_unlock(&snd_card_mutex); return count; } -static struct device_attribute card_id_attrs = - __ATTR(id, S_IRUGO | S_IWUSR, card_id_show_attr, card_id_store_attr); +static DEVICE_ATTR(id, S_IRUGO | S_IWUSR, card_id_show_attr, card_id_store_attr); static ssize_t card_number_show_attr(struct device *dev, struct device_attribute *attr, char *buf) { - struct snd_card *card = dev_get_drvdata(dev); - return snprintf(buf, PAGE_SIZE, "%i\n", card ? card->number : -1); + struct snd_card *card = container_of(dev, struct snd_card, card_dev); + return snprintf(buf, PAGE_SIZE, "%i\n", card->number); } -static struct device_attribute card_number_attrs = - __ATTR(number, S_IRUGO, card_number_show_attr, NULL); +static DEVICE_ATTR(number, S_IRUGO, card_number_show_attr, NULL); + +static struct attribute *card_dev_attrs[] = { + &dev_attr_id.attr, + &dev_attr_number.attr, + NULL +}; + +static struct attribute_group card_dev_attr_group = { + .attrs = card_dev_attrs, +}; + +static const struct attribute_group *card_dev_attr_groups[] = { + &card_dev_attr_group, + NULL +}; /** * snd_card_register - register the soundcard @@ -642,7 +684,7 @@ static struct device_attribute card_number_attrs = * external accesses. Thus, you should call this function at the end * of the initialization of the card. * - * Returns zero otherwise a negative error code if the registration failed. + * Return: Zero otherwise a negative error code if the registration failed. */ int snd_card_register(struct snd_card *card) { @@ -651,12 +693,11 @@ int snd_card_register(struct snd_card *card) if (snd_BUG_ON(!card)) return -EINVAL; - if (!card->card_dev) { - card->card_dev = device_create(sound_class, card->dev, - MKDEV(0, 0), card, - "card%i", card->number); - if (IS_ERR(card->card_dev)) - card->card_dev = NULL; + if (!card->registered) { + err = device_add(&card->card_dev); + if (err < 0) + return err; + card->registered = true; } if ((err = snd_device_register_all(card)) < 0) @@ -667,23 +708,25 @@ int snd_card_register(struct snd_card *card) mutex_unlock(&snd_card_mutex); return 0; } - snd_card_set_id_no_lock(card, card->id[0] == '\0' ? NULL : card->id); + if (*card->id) { + /* make a unique id name from the given string */ + char tmpid[sizeof(card->id)]; + memcpy(tmpid, card->id, sizeof(card->id)); + snd_card_set_id_no_lock(card, tmpid, tmpid); + } else { + /* create an id from either shortname or longname */ + const char *src; + src = *card->shortname ? card->shortname : card->longname; + snd_card_set_id_no_lock(card, src, + retrieve_id_from_card_name(src)); + } snd_cards[card->number] = card; mutex_unlock(&snd_card_mutex); init_info_for_card(card); -#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) +#if IS_ENABLED(CONFIG_SND_MIXER_OSS) if (snd_mixer_oss_notify_callback) snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_REGISTER); #endif - if (card->card_dev) { - err = device_create_file(card->card_dev, &card_id_attrs); - if (err < 0) - return err; - err = device_create_file(card->card_dev, &card_number_attrs); - if (err < 0) - return err; - } - return 0; } @@ -803,7 +846,7 @@ int __exit snd_card_info_done(void) * This function adds the component id string to the supported list. * The component can be referred from the alsa-lib. * - * Returns zero otherwise a negative error code. + * Return: Zero otherwise a negative error code. */ int snd_component_add(struct snd_card *card, const char *component) @@ -837,7 +880,7 @@ EXPORT_SYMBOL(snd_component_add); * This linked-list is used to keep tracking the connection state, * and to avoid the release of busy resources by hotplug. * - * Returns zero or a negative error code. + * Return: zero or a negative error code. */ int snd_card_file_add(struct snd_card *card, struct file *file) { @@ -848,6 +891,7 @@ int snd_card_file_add(struct snd_card *card, struct file *file) return -ENOMEM; mfile->file = file; mfile->disconnected_f_op = NULL; + INIT_LIST_HEAD(&mfile->shutdown_list); spin_lock(&card->files_lock); if (card->shutdown) { spin_unlock(&card->files_lock); @@ -855,6 +899,7 @@ int snd_card_file_add(struct snd_card *card, struct file *file) return -ENODEV; } list_add(&mfile->list, &card->files_list); + get_device(&card->card_dev); spin_unlock(&card->files_lock); return 0; } @@ -872,36 +917,32 @@ EXPORT_SYMBOL(snd_card_file_add); * called beforehand, it processes the pending release of * resources. * - * Returns zero or a negative error code. + * Return: Zero or a negative error code. */ int snd_card_file_remove(struct snd_card *card, struct file *file) { struct snd_monitor_file *mfile, *found = NULL; - int last_close = 0; spin_lock(&card->files_lock); list_for_each_entry(mfile, &card->files_list, list) { if (mfile->file == file) { list_del(&mfile->list); + spin_lock(&shutdown_lock); + list_del(&mfile->shutdown_list); + spin_unlock(&shutdown_lock); if (mfile->disconnected_f_op) fops_put(mfile->disconnected_f_op); found = mfile; break; } } - if (list_empty(&card->files_list)) - last_close = 1; spin_unlock(&card->files_lock); - if (last_close) { - wake_up(&card->shutdown_sleep); - if (card->free_on_last_close) - snd_card_do_free(card); - } if (!found) { - snd_printk(KERN_ERR "ALSA card file remove problem (%p)\n", file); + dev_err(card->dev, "card file remove problem (%p)\n", file); return -ENOENT; } kfree(found); + put_device(&card->card_dev); return 0; } @@ -915,6 +956,8 @@ EXPORT_SYMBOL(snd_card_file_remove); * * Waits until the power-state is changed. * + * Return: Zero if successful, or a negative error code. + * * Note: the power lock must be active before call. */ int snd_power_wait(struct snd_card *card, unsigned int power_state) |