linux-2.6.33/snd_register_device_for_dev() の変更点

• 追加された行はこの色です。
• 削除された行はこの色です。
• linux-2.6.33/snd_register_device_for_dev() へ行く。
• linux-2.6.33/snd_register_device_for_dev() の差分を削除

*参照元 [#l6750175]
#backlinks

*説明 [#sed1cea3]
-パス: [[linux-2.6.33/sound/core/sound.c]]

-FIXME: これは何？
--説明


**引数 [#tb086db5]
-int type
--
-struct snd_card *card
--
--[[linux-2.6.33/snd_card]]
-int dev
--
-const struct file_operations *f_ops
--
--[[linux-2.6.33/file_operations]]
-void *private_data
--
-const char *name
--
-struct device *device
--
--[[linux-2.6.33/device]]


**返り値 [#g68a64d4]
-int
--


**参考 [#s0bb4112]


*実装 [#l950569c]
 /**
  * snd_register_device_for_dev - Register the ALSA device file for the card
  * @type: the device type, SNDRV_DEVICE_TYPE_XXX
  * @card: the card instance
  * @dev: the device index
  * @f_ops: the file operations
  * @private_data: user pointer for f_ops->open()
  * @name: the device file name
  * @device: the &struct device to link this new device to
  *
  * Registers an ALSA device file for the given card.
  * The operators have to be set in reg parameter.
  *
  * Returns zero if successful, or a negative error code on failure.
  */
 int snd_register_device_for_dev(int type, struct snd_card *card, int dev,
 				const struct file_operations *f_ops,
 				void *private_data,
 				const char *name, struct device *device)
 {
 	int minor;
 	struct snd_minor *preg;
 
-
--[[linux-2.6.33/snd_minor]]

 	if (snd_BUG_ON(!name))
 		return -EINVAL;
-
--[[linux-2.6.33/snd_BUG_ON()]]

 	preg = kmalloc(sizeof *preg, GFP_KERNEL);
 	if (preg == NULL)
 		return -ENOMEM;
-
--[[linux-2.6.33/kmalloc()]]

 	preg->type = type;
 	preg->card = card ? card->number : -1;
 	preg->device = dev;
 	preg->f_ops = f_ops;
 	preg->private_data = private_data;
 	mutex_lock(&sound_mutex);
-
--[[linux-2.6.33/mutex_lock()]]
-
--[[linux-2.6.33/sound_mutex(global)]]

 #ifdef CONFIG_SND_DYNAMIC_MINORS
-
--[[linux-2.6.33/CONFIG_SND_DYNAMIC_MINORS]]

 	minor = snd_find_free_minor();
-
--[[linux-2.6.33/snd_find_free_minor()]]

 #else
 	minor = snd_kernel_minor(type, card, dev);
 	if (minor >= 0 && snd_minors[minor])
 		minor = -EBUSY;
-
--[[linux-2.6.33/snd_kernel_minor()]]

 #endif
 	if (minor < 0) {
 		mutex_unlock(&sound_mutex);
 		kfree(preg);
 		return minor;
 	}
-
--[[linux-2.6.33/mutex_unlock()]]
-
--[[linux-2.6.33/kfree()]]

 	snd_minors[minor] = preg;
 	preg->dev = device_create(sound_class, device, MKDEV(major, minor),
 				  private_data, "%s", name);
-
--[[linux-2.6.33/device_create()]]
-
--[[linux-2.6.33/sound_class(global)]]
-
--[[linux-2.6.33/MKDEV()]]

 	if (IS_ERR(preg->dev)) {
 		snd_minors[minor] = NULL;
 		mutex_unlock(&sound_mutex);
 		minor = PTR_ERR(preg->dev);
 		kfree(preg);
 		return minor;
 	}
 
-
--[[linux-2.6.33/IS_ERR()]]
-
--[[linux-2.6.33/snd_minors(global)]]
-
--[[linux-2.6.33/PTR_ERR()]]

 	mutex_unlock(&sound_mutex);
 	return 0;
 }
 
 EXPORT_SYMBOL(snd_register_device_for_dev);
-モジュールのライセンスに関係なくシンボルを公開する。
--[[linux-2.6.33/EXPORT_SYMBOL()]]


*コメント [#z903129e]