X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=sound%2Fcore%2Fseq%2Fseq_device.c;fp=sound%2Fcore%2Fseq%2Fseq_device.c;h=b79d011813c026436b9b8c311daec32962d48ac6;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=9ece443fba5599058c5e71e564f5af21159f38c3;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git diff --git a/sound/core/seq/seq_device.c b/sound/core/seq/seq_device.c index 9ece443fb..b79d01181 100644 --- a/sound/core/seq/seq_device.c +++ b/sound/core/seq/seq_device.c @@ -45,6 +45,7 @@ #include #include #include +#include MODULE_AUTHOR("Takashi Iwai "); MODULE_DESCRIPTION("ALSA sequencer device management"); @@ -69,7 +70,7 @@ struct ops_list { struct list_head dev_list; /* list of devices */ int num_devices; /* number of associated devices */ int num_init_devices; /* number of initialized devices */ - struct semaphore reg_mutex; + struct mutex reg_mutex; struct list_head list; /* next driver */ }; @@ -77,9 +78,9 @@ struct ops_list { static LIST_HEAD(opslist); static int num_ops; -static DECLARE_MUTEX(ops_mutex); +static DEFINE_MUTEX(ops_mutex); #ifdef CONFIG_PROC_FS -static struct snd_info_entry *info_entry = NULL; +static struct snd_info_entry *info_entry; #endif /* @@ -89,7 +90,6 @@ static int snd_seq_device_free(struct snd_seq_device *dev); static int snd_seq_device_dev_free(struct snd_device *device); static int snd_seq_device_dev_register(struct snd_device *device); static int snd_seq_device_dev_disconnect(struct snd_device *device); -static int snd_seq_device_dev_unregister(struct snd_device *device); static int init_device(struct snd_seq_device *dev, struct ops_list *ops); static int free_device(struct snd_seq_device *dev, struct ops_list *ops); @@ -108,7 +108,7 @@ static void snd_seq_device_info(struct snd_info_entry *entry, { struct list_head *head; - down(&ops_mutex); + mutex_lock(&ops_mutex); list_for_each(head, &opslist) { struct ops_list *ops = list_entry(head, struct ops_list, list); snd_iprintf(buffer, "snd-%s%s%s%s,%d\n", @@ -118,7 +118,7 @@ static void snd_seq_device_info(struct snd_info_entry *entry, ops->driver & DRIVER_LOCKED ? ",locked" : "", ops->num_devices); } - up(&ops_mutex); + mutex_unlock(&ops_mutex); } #endif @@ -154,20 +154,20 @@ void snd_seq_device_load_drivers(void) if (! current->fs->root) return; - down(&ops_mutex); + mutex_lock(&ops_mutex); list_for_each(head, &opslist) { struct ops_list *ops = list_entry(head, struct ops_list, list); if (! (ops->driver & DRIVER_LOADED) && ! (ops->driver & DRIVER_REQUESTED)) { ops->used++; - up(&ops_mutex); + mutex_unlock(&ops_mutex); ops->driver |= DRIVER_REQUESTED; request_module("snd-%s", ops->id); - down(&ops_mutex); + mutex_lock(&ops_mutex); ops->used--; } } - up(&ops_mutex); + mutex_unlock(&ops_mutex); #endif } @@ -188,7 +188,6 @@ int snd_seq_device_new(struct snd_card *card, int device, char *id, int argsize, .dev_free = snd_seq_device_dev_free, .dev_register = snd_seq_device_dev_register, .dev_disconnect = snd_seq_device_dev_disconnect, - .dev_unregister = snd_seq_device_dev_unregister }; if (result) @@ -214,10 +213,10 @@ int snd_seq_device_new(struct snd_card *card, int device, char *id, int argsize, dev->status = SNDRV_SEQ_DEVICE_FREE; /* add this device to the list */ - down(&ops->reg_mutex); + mutex_lock(&ops->reg_mutex); list_add_tail(&dev->list, &ops->dev_list); ops->num_devices++; - up(&ops->reg_mutex); + mutex_unlock(&ops->reg_mutex); unlock_driver(ops); @@ -246,10 +245,10 @@ static int snd_seq_device_free(struct snd_seq_device *dev) return -ENXIO; /* remove the device from the list */ - down(&ops->reg_mutex); + mutex_lock(&ops->reg_mutex); list_del(&dev->list); ops->num_devices--; - up(&ops->reg_mutex); + mutex_unlock(&ops->reg_mutex); free_device(dev, ops); if (dev->private_free) @@ -307,15 +306,6 @@ static int snd_seq_device_dev_disconnect(struct snd_device *device) return 0; } -/* - * unregister the existing device - */ -static int snd_seq_device_dev_unregister(struct snd_device *device) -{ - struct snd_seq_device *dev = device->device_data; - return snd_seq_device_free(dev); -} - /* * register device driver * id = driver id @@ -344,7 +334,7 @@ int snd_seq_device_register_driver(char *id, struct snd_seq_dev_ops *entry, return -EBUSY; } - down(&ops->reg_mutex); + mutex_lock(&ops->reg_mutex); /* copy driver operators */ ops->ops = *entry; ops->driver |= DRIVER_LOADED; @@ -355,7 +345,7 @@ int snd_seq_device_register_driver(char *id, struct snd_seq_dev_ops *entry, struct snd_seq_device *dev = list_entry(head, struct snd_seq_device, list); init_device(dev, ops); } - up(&ops->reg_mutex); + mutex_unlock(&ops->reg_mutex); unlock_driver(ops); snd_seq_autoload_unlock(); @@ -371,24 +361,29 @@ static struct ops_list * create_driver(char *id) { struct ops_list *ops; - ops = kmalloc(sizeof(*ops), GFP_KERNEL); + ops = kzalloc(sizeof(*ops), GFP_KERNEL); if (ops == NULL) return ops; - memset(ops, 0, sizeof(*ops)); /* set up driver entry */ strlcpy(ops->id, id, sizeof(ops->id)); - init_MUTEX(&ops->reg_mutex); + mutex_init(&ops->reg_mutex); + /* + * The ->reg_mutex locking rules are per-driver, so we create + * separate per-driver lock classes: + */ + lockdep_set_class(&ops->reg_mutex, (struct lock_class_key *)id); + ops->driver = DRIVER_EMPTY; INIT_LIST_HEAD(&ops->dev_list); /* lock this instance */ ops->used = 1; /* register driver entry */ - down(&ops_mutex); + mutex_lock(&ops_mutex); list_add_tail(&ops->list, &opslist); num_ops++; - up(&ops_mutex); + mutex_unlock(&ops_mutex); return ops; } @@ -414,7 +409,7 @@ int snd_seq_device_unregister_driver(char *id) } /* close and release all devices associated with this driver */ - down(&ops->reg_mutex); + mutex_lock(&ops->reg_mutex); ops->driver |= DRIVER_LOCKED; /* do not remove this driver recursively */ list_for_each(head, &ops->dev_list) { struct snd_seq_device *dev = list_entry(head, struct snd_seq_device, list); @@ -425,7 +420,7 @@ int snd_seq_device_unregister_driver(char *id) if (ops->num_init_devices > 0) snd_printk(KERN_ERR "free_driver: init_devices > 0!! (%d)\n", ops->num_init_devices); - up(&ops->reg_mutex); + mutex_unlock(&ops->reg_mutex); unlock_driver(ops); @@ -443,7 +438,7 @@ static void remove_drivers(void) { struct list_head *head; - down(&ops_mutex); + mutex_lock(&ops_mutex); head = opslist.next; while (head != &opslist) { struct ops_list *ops = list_entry(head, struct ops_list, list); @@ -456,7 +451,7 @@ static void remove_drivers(void) } else head = head->next; } - up(&ops_mutex); + mutex_unlock(&ops_mutex); } /* @@ -519,16 +514,16 @@ static struct ops_list * find_driver(char *id, int create_if_empty) { struct list_head *head; - down(&ops_mutex); + mutex_lock(&ops_mutex); list_for_each(head, &opslist) { struct ops_list *ops = list_entry(head, struct ops_list, list); if (strcmp(ops->id, id) == 0) { ops->used++; - up(&ops_mutex); + mutex_unlock(&ops_mutex); return ops; } } - up(&ops_mutex); + mutex_unlock(&ops_mutex); if (create_if_empty) return create_driver(id); return NULL; @@ -536,9 +531,9 @@ static struct ops_list * find_driver(char *id, int create_if_empty) static void unlock_driver(struct ops_list *ops) { - down(&ops_mutex); + mutex_lock(&ops_mutex); ops->used--; - up(&ops_mutex); + mutex_unlock(&ops_mutex); } @@ -554,7 +549,6 @@ static int __init alsa_seq_device_init(void) if (info_entry == NULL) return -ENOMEM; info_entry->content = SNDRV_INFO_CONTENT_TEXT; - info_entry->c.text.read_size = 2048; info_entry->c.text.read = snd_seq_device_info; if (snd_info_register(info_entry) < 0) { snd_info_free_entry(info_entry); @@ -568,7 +562,7 @@ static void __exit alsa_seq_device_exit(void) { remove_drivers(); #ifdef CONFIG_PROC_FS - snd_info_unregister(info_entry); + snd_info_free_entry(info_entry); #endif if (num_ops) snd_printk(KERN_ERR "drivers not released (%d)\n", num_ops);