[ALSA] dynamic minors (3/6): store device-specific object pointers dynamically
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>
diff --git a/sound/core/control.c b/sound/core/control.c
index 23561e7..abd62f9 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -47,13 +47,12 @@
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 @@
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;
}