ALSA: control: Embed struct device
This patch embeds a struct device for the control device into the card
object and avoid the device creation at registration time.
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/control.c b/sound/core/control.c
index cd246a0..e214fab 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -1660,19 +1660,10 @@
static int snd_ctl_dev_register(struct snd_device *device)
{
struct snd_card *card = device->device_data;
- int err, cardnum;
- char name[16];
- if (snd_BUG_ON(!card))
- return -ENXIO;
- cardnum = card->number;
- if (snd_BUG_ON(cardnum < 0 || cardnum >= SNDRV_CARDS))
- return -ENXIO;
- sprintf(name, "controlC%i", cardnum);
- if ((err = snd_register_device(SNDRV_DEVICE_TYPE_CONTROL, card, -1,
- &snd_ctl_f_ops, card, name)) < 0)
- return err;
- return 0;
+ return snd_register_device_for_dev(SNDRV_DEVICE_TYPE_CONTROL, card,
+ -1, &snd_ctl_f_ops, card,
+ &card->ctl_dev, NULL, NULL);
}
/*
@@ -1682,13 +1673,6 @@
{
struct snd_card *card = device->device_data;
struct snd_ctl_file *ctl;
- int err, cardnum;
-
- if (snd_BUG_ON(!card))
- return -ENXIO;
- cardnum = card->number;
- if (snd_BUG_ON(cardnum < 0 || cardnum >= SNDRV_CARDS))
- return -ENXIO;
read_lock(&card->ctl_files_rwlock);
list_for_each_entry(ctl, &card->ctl_files, list) {
@@ -1697,10 +1681,7 @@
}
read_unlock(&card->ctl_files_rwlock);
- if ((err = snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL,
- card, -1)) < 0)
- return err;
- return 0;
+ return snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL, card, -1);
}
/*
@@ -1717,6 +1698,7 @@
snd_ctl_remove(card, control);
}
up_write(&card->controls_rwsem);
+ put_device(&card->ctl_dev);
return 0;
}
@@ -1731,10 +1713,20 @@
.dev_register = snd_ctl_dev_register,
.dev_disconnect = snd_ctl_dev_disconnect,
};
+ int err;
if (snd_BUG_ON(!card))
return -ENXIO;
- return snd_device_new(card, SNDRV_DEV_CONTROL, card, &ops);
+ if (snd_BUG_ON(card->number < 0 || card->number >= SNDRV_CARDS))
+ return -ENXIO;
+
+ snd_device_initialize(&card->ctl_dev, card);
+ dev_set_name(&card->ctl_dev, "controlC%d", card->number);
+
+ err = snd_device_new(card, SNDRV_DEV_CONTROL, card, &ops);
+ if (err < 0)
+ put_device(&card->ctl_dev);
+ return err;
}
/*