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[ALSA] dynamic minors (6/6): increase maximum number of sound cards

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Modules: ALSA Core,Memalloc module,ALSA sequencer

With dynamic minor numbers, we can increase the number of sound cards.

This requires that the sequencer client numbers of some kernel drivers
are allocated dynamically, too.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch
2005-11-20 14:09:05 +01:00
committed by Jaroslav Kysela
parent 204bdb1b50
commit d001544ded
6 changed files with 49 additions and 21 deletions
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sound/core/seq/seq_clientmgr.c
+25 -6
View File
@@ -47,6 +47,10 @@
*
*/
/* range for dynamically allocated client numbers of kernel drivers */
#define SNDRV_SEQ_DYNAMIC_CLIENT_BEGIN 16
#define SNDRV_SEQ_DYNAMIC_CLIENT_END 48
#define SNDRV_SEQ_LFLG_INPUT 0x0001
#define SNDRV_SEQ_LFLG_OUTPUT 0x0002
#define SNDRV_SEQ_LFLG_OPEN (SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT)
@@ -203,7 +207,8 @@ int __init client_init_data(void)
}
static struct snd_seq_client *seq_create_client1(int client_index, int poolsize)
static struct snd_seq_client *seq_create_client1(int client_index, int poolsize,
int kernel_client)
{
unsigned long flags;
int c;
@@ -227,7 +232,15 @@ static struct snd_seq_client *seq_create_client1(int client_index, int poolsize)
/* find free slot in the client table */
spin_lock_irqsave(&clients_lock, flags);
if (client_index < 0) {
for (c = 128; c < SNDRV_SEQ_MAX_CLIENTS; c++) {
int cmin, cmax;
if (kernel_client) {
cmin = SNDRV_SEQ_DYNAMIC_CLIENT_BEGIN;
cmax = SNDRV_SEQ_DYNAMIC_CLIENT_END;
} else {
cmin = 128;
cmax = SNDRV_SEQ_MAX_CLIENTS;
}
for (c = cmin; c < cmax; c++) {
if (clienttab[c] || clienttablock[c])
continue;
clienttab[client->number = c] = client;
@@ -306,7 +319,7 @@ static int snd_seq_open(struct inode *inode, struct file *file)
if (down_interruptible(&register_mutex))
return -ERESTARTSYS;
client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS);
client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS, 0);
if (client == NULL) {
up(&register_mutex);
return -ENOMEM; /* failure code */
@@ -2212,13 +2225,19 @@ int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
return -EINVAL;
if (card == NULL && client_index > 63)
return -EINVAL;
if (card)
client_index += 64 + (card->number << 2);
if (down_interruptible(&register_mutex))
return -ERESTARTSYS;
if (card) {
if (card->number < 16)
client_index += 64 + (card->number << 2);
else
client_index = -1;
}
/* empty write queue as default */
client = seq_create_client1(client_index, 0);
client = seq_create_client1(client_index, 0, 1);
if (client == NULL) {
up(&register_mutex);
return -EBUSY; /* failure code */