Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[cascardo/linux.git] / sound / core / sound.c

diff --git a/sound/core/sound.c b/sound/core/sound.c
index 7edd1fc..efa476c 100644 (file)
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -268,7 +268,11 @@ int snd_register_device(int type, struct snd_card *card, int dev,
        snd_minors[minor] = preg;
        if (card)
                device = card->dev;
-       class_device_create(sound_class, NULL, MKDEV(major, minor), device, "%s", name);
+       preg->class_dev = class_device_create(sound_class, NULL,
+                                             MKDEV(major, minor),
+                                             device, "%s", name);
+       if (preg->class_dev)
+               class_set_devdata(preg->class_dev, private_data);
 
        mutex_unlock(&sound_mutex);
        return 0;
@@ -276,6 +280,24 @@ int snd_register_device(int type, struct snd_card *card, int dev,
 
 EXPORT_SYMBOL(snd_register_device);
 
+/* find the matching minor record
+ * return the index of snd_minor, or -1 if not found
+ */
+static int find_snd_minor(int type, struct snd_card *card, int dev)
+{
+       int cardnum, minor;
+       struct snd_minor *mptr;
+
+       cardnum = card ? card->number : -1;
+       for (minor = 0; minor < ARRAY_SIZE(snd_minors); ++minor)
+               if ((mptr = snd_minors[minor]) != NULL &&
+                   mptr->type == type &&
+                   mptr->card == cardnum &&
+                   mptr->device == dev)
+                       return minor;
+       return -1;
+}
+
 /**
  * snd_unregister_device - unregister the device on the given card
  * @type: the device type, SNDRV_DEVICE_TYPE_XXX
@@ -289,32 +311,42 @@ EXPORT_SYMBOL(snd_register_device);
  */
 int snd_unregister_device(int type, struct snd_card *card, int dev)
 {
-       int cardnum, minor;
-       struct snd_minor *mptr;
+       int minor;
 
-       cardnum = card ? card->number : -1;
        mutex_lock(&sound_mutex);
-       for (minor = 0; minor < ARRAY_SIZE(snd_minors); ++minor)
-               if ((mptr = snd_minors[minor]) != NULL &&
-                   mptr->type == type &&
-                   mptr->card == cardnum &&
-                   mptr->device == dev)
-                       break;
-       if (minor == ARRAY_SIZE(snd_minors)) {
+       minor = find_snd_minor(type, card, dev);
+       if (minor < 0) {
                mutex_unlock(&sound_mutex);
                return -EINVAL;
        }
 
        class_device_destroy(sound_class, MKDEV(major, minor));
 
+       kfree(snd_minors[minor]);
        snd_minors[minor] = NULL;
        mutex_unlock(&sound_mutex);
-       kfree(mptr);
        return 0;
 }
 
 EXPORT_SYMBOL(snd_unregister_device);
 
+int snd_add_device_sysfs_file(int type, struct snd_card *card, int dev,
+                             const struct class_device_attribute *attr)
+{
+       int minor, ret = -EINVAL;
+       struct class_device *cdev;
+
+       mutex_lock(&sound_mutex);
+       minor = find_snd_minor(type, card, dev);
+       if (minor >= 0 && (cdev = snd_minors[minor]->class_dev) != NULL)
+               ret = class_device_create_file(cdev, attr);
+       mutex_unlock(&sound_mutex);
+       return ret;
+
+}
+
+EXPORT_SYMBOL(snd_add_device_sysfs_file);
+
 #ifdef CONFIG_PROC_FS
 /*
  *  INFO PART
@@ -387,8 +419,7 @@ int __init snd_minor_info_init(void)
 
 int __exit snd_minor_info_done(void)
 {
-       if (snd_minor_info_entry)
-               snd_info_unregister(snd_minor_info_entry);
+       snd_info_free_entry(snd_minor_info_entry);
        return 0;
 }
 #endif /* CONFIG_PROC_FS */