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[ALSA] dynamic minors (3/6): store device-specific object pointers dynamically

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Instead of storing the pointers to the device-specific structures in an
array, put them into the struct snd_minor, and look them up dynamically.

This makes the device type modules independent of the minor number
encoding.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2005-11-20 14:06:59 +01:00 • committed by Jaroslav Kysela
parent 6983b7240c
commit f87135f56c
17 changed files with 278 additions and 197 deletions
Download patch file Download diff file Expand all files Collapse all files

7
sound/core/control.c
View file

@ -47,13 +47,12 @@ static LIST_HEAD(snd_control_compat_ioctls);
static int snd_ctl_open(struct inode *inode, struct file *file)
{
int cardnum = SNDRV_MINOR_CARD(iminor(inode));
unsigned long flags;
struct snd_card *card;
struct snd_ctl_file *ctl;
int err;
card = snd_cards[cardnum];
card = snd_lookup_minor_data(iminor(inode), SNDRV_DEVICE_TYPE_CONTROL);
if (!card) {
err = -ENODEV;
goto __error1;
@ -1277,8 +1276,8 @@ static int snd_ctl_dev_register(struct snd_device *device)
cardnum = card->number;
snd_assert(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, name)) < 0)
if ((err = snd_register_device(SNDRV_DEVICE_TYPE_CONTROL, card, -1,
&snd_ctl_f_ops, card, name)) < 0)
return err;
return 0;
}