return client;
}
+/* Take refcount and perform ioctl_mutex lock on the given client;
+ * used only for OSS sequencer
+ * Unlock via snd_seq_client_ioctl_unlock() below
+ */
+bool snd_seq_client_ioctl_lock(int clientid)
+{
+ struct snd_seq_client *client;
+
+ client = snd_seq_client_use_ptr(clientid);
+ if (!client)
+ return false;
+ mutex_lock(&client->ioctl_mutex);
+ /* The client isn't unrefed here; see snd_seq_client_ioctl_unlock() */
+ return true;
+}
+EXPORT_SYMBOL_GPL(snd_seq_client_ioctl_lock);
+
+/* Unlock and unref the given client; for OSS sequencer use only */
+void snd_seq_client_ioctl_unlock(int clientid)
+{
+ struct snd_seq_client *client;
+
+ client = snd_seq_client_use_ptr(clientid);
+ if (WARN_ON(!client))
+ return;
+ mutex_unlock(&client->ioctl_mutex);
+ /* The doubly unrefs below are intentional; the first one releases the
+ * leftover from snd_seq_client_ioctl_lock() above, and the second one
+ * is for releasing snd_seq_client_use_ptr() in this function
+ */
+ snd_seq_client_unlock(client);
+ snd_seq_client_unlock(client);
+}
+EXPORT_SYMBOL_GPL(snd_seq_client_ioctl_unlock);
+
static void usage_alloc(struct snd_seq_usage *res, int num)
{
res->cur += num;
static struct snd_seq_client *seq_create_client1(int client_index, int poolsize)
{
- unsigned long flags;
int c;
struct snd_seq_client *client;
mutex_init(&client->ioctl_mutex);
/* find free slot in the client table */
- spin_lock_irqsave(&clients_lock, flags);
+ spin_lock_irq(&clients_lock);
if (client_index < 0) {
for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN;
c < SNDRV_SEQ_MAX_CLIENTS;
if (clienttab[c] || clienttablock[c])
continue;
clienttab[client->number = c] = client;
- spin_unlock_irqrestore(&clients_lock, flags);
+ spin_unlock_irq(&clients_lock);
return client;
}
} else {
if (clienttab[client_index] == NULL && !clienttablock[client_index]) {
clienttab[client->number = client_index] = client;
- spin_unlock_irqrestore(&clients_lock, flags);
+ spin_unlock_irq(&clients_lock);
return client;
}
}
- spin_unlock_irqrestore(&clients_lock, flags);
+ spin_unlock_irq(&clients_lock);
snd_seq_pool_delete(&client->pool);
kfree(client);
return NULL; /* no free slot found or busy, return failure code */
static int seq_free_client1(struct snd_seq_client *client)
{
- unsigned long flags;
-
if (!client)
return 0;
- spin_lock_irqsave(&clients_lock, flags);
+ spin_lock_irq(&clients_lock);
clienttablock[client->number] = 1;
clienttab[client->number] = NULL;
- spin_unlock_irqrestore(&clients_lock, flags);
+ spin_unlock_irq(&clients_lock);
snd_seq_delete_all_ports(client);
snd_seq_queue_client_leave(client->number);
snd_use_lock_sync(&client->use_lock);
snd_seq_queue_client_termination(client->number);
if (client->pool)
snd_seq_pool_delete(&client->pool);
- spin_lock_irqsave(&clients_lock, flags);
+ spin_lock_irq(&clients_lock);
clienttablock[client->number] = 0;
- spin_unlock_irqrestore(&clients_lock, flags);
+ spin_unlock_irq(&clients_lock);
return 0;
}
int result;
struct snd_seq_client *sender = NULL;
struct snd_seq_client_port *sport = NULL;
- struct snd_seq_subscribers *p;
result = -EINVAL;
if ((sender = snd_seq_client_use_ptr(subs->sender.client)) == NULL)
goto __end;
if ((sport = snd_seq_port_use_ptr(sender, subs->sender.port)) == NULL)
goto __end;
- p = snd_seq_port_get_subscription(&sport->c_src, &subs->dest);
- if (p) {
- result = 0;
- *subs = p->info;
- } else
- result = -ENOENT;
-
+ result = snd_seq_port_get_subscription(&sport->c_src, &subs->dest,
+ subs);
__end:
if (sport)
snd_seq_port_unlock(sport);
}
EXPORT_SYMBOL(snd_seq_delete_kernel_client);
-/* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue
- * and snd_seq_kernel_client_enqueue_blocking
+/*
+ * exported, called by kernel clients to enqueue events (w/o blocking)
+ *
+ * RETURN VALUE: zero if succeed, negative if error
*/
-static int kernel_client_enqueue(int client, struct snd_seq_event *ev,
- struct file *file, int blocking,
- int atomic, int hop)
+int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev,
+ struct file *file, bool blocking)
{
struct snd_seq_client *cptr;
int result;
if (cptr == NULL)
return -EINVAL;
- if (! cptr->accept_output)
+ if (!cptr->accept_output) {
result = -EPERM;
- else /* send it */
+ } else { /* send it */
+ mutex_lock(&cptr->ioctl_mutex);
result = snd_seq_client_enqueue_event(cptr, ev, file, blocking,
- atomic, hop, NULL);
+ false, 0,
+ &cptr->ioctl_mutex);
+ mutex_unlock(&cptr->ioctl_mutex);
+ }
snd_seq_client_unlock(cptr);
return result;
}
-
-/*
- * exported, called by kernel clients to enqueue events (w/o blocking)
- *
- * RETURN VALUE: zero if succeed, negative if error
- */
-int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev,
- int atomic, int hop)
-{
- return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop);
-}
EXPORT_SYMBOL(snd_seq_kernel_client_enqueue);
-/*
- * exported, called by kernel clients to enqueue events (with blocking)
- *
- * RETURN VALUE: zero if succeed, negative if error
- */
-int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
- struct file *file,
- int atomic, int hop)
-{
- return kernel_client_enqueue(client, ev, file, 1, atomic, hop);
-}
-EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking);
-
/*
* exported, called by kernel clients to dispatch events directly to other
* clients, bypassing the queues. Event time-stamp will be updated.
git.samba.org / sfrench / cifs-2.6.git / blobdiff