[ALSA] seq: remove struct snd_seq_client_callback

The fields of struct snd_seq_client_callback either aren't used or are
always set to the same value, so we can get rid of it altogether.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

sound/core/seq/oss/seq_oss_init.c

@@ -65,7 +65,6 @@ int __init
 snd_seq_oss_create_client(void)
 {
 	int rc;
-	struct snd_seq_client_callback callback;
 	struct snd_seq_client_info *info;
 	struct snd_seq_port_info *port;
 	struct snd_seq_port_callback port_callback;
@@ -78,13 +77,7 @@ snd_seq_oss_create_client(void)
 	}
 
 	/* create ALSA client */
-	memset(&callback, 0, sizeof(callback));
-
-	callback.private_data = NULL;
-	callback.allow_input = 1;
-	callback.allow_output = 1;
-
-	rc = snd_seq_create_kernel_client(NULL, SNDRV_SEQ_CLIENT_OSS, &callback);
+	rc = snd_seq_create_kernel_client(NULL, SNDRV_SEQ_CLIENT_OSS);
 	if (rc < 0)
 		goto __error;
 

sound/core/seq/seq_clientmgr.c

@@ -2212,15 +2212,12 @@ static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg
 
 
 /* exported to kernel modules */
-int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
-				 struct snd_seq_client_callback *callback)
+int snd_seq_create_kernel_client(struct snd_card *card, int client_index)
 {
 	struct snd_seq_client *client;
 
 	snd_assert(! in_interrupt(), return -EBUSY);
 
-	if (callback == NULL)
-		return -EINVAL;
 	if (card && client_index > 3)
 		return -EINVAL;
 	if (card == NULL && client_index > 63)
@@ -2244,8 +2241,8 @@ int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
 	}
 	usage_alloc(&client_usage, 1);
 
-	client->accept_input = callback->allow_output;
-	client->accept_output = callback->allow_input;
+	client->accept_input = 1;
+	client->accept_output = 1;
 		
 	sprintf(client->name, "Client-%d", client->number);
 

sound/core/seq/seq_clientmgr.h

@@ -91,8 +91,6 @@ struct snd_seq_client *snd_seq_client_use_ptr(int clientid);
 int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);
 
 /* exported to other modules */
-int snd_seq_register_kernel_client(struct snd_seq_client_callback *callback, void *private_data);
-int snd_seq_unregister_kernel_client(int client);
 int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop);
 int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
 					   struct file *file, int atomic, int hop);

sound/core/seq/seq_dummy.c

@@ -193,7 +193,6 @@ create_port(int idx, int type)
 static int __init
 register_client(void)
 {
-	struct snd_seq_client_callback cb;
 	struct snd_seq_client_info cinfo;
 	struct snd_seq_dummy_port *rec1, *rec2;
 	int i;
@@ -204,10 +203,7 @@ register_client(void)
 	}
 
 	/* create client */
-	memset(&cb, 0, sizeof(cb));
-	cb.allow_input = 1;
-	cb.allow_output = 1;
-	my_client = snd_seq_create_kernel_client(NULL, SNDRV_SEQ_CLIENT_DUMMY, &cb);
+	my_client = snd_seq_create_kernel_client(NULL, SNDRV_SEQ_CLIENT_DUMMY);
 	if (my_client < 0)
 		return my_client;
 

sound/core/seq/seq_midi.c

@@ -295,7 +295,6 @@ snd_seq_midisynth_register_port(struct snd_seq_device *dev)
 	struct snd_rawmidi_info *info;
 	int newclient = 0;
 	unsigned int p, ports;
-	struct snd_seq_client_callback callbacks;
 	struct snd_seq_port_callback pcallbacks;
 	struct snd_card *card = dev->card;
 	int device = dev->device;
@@ -334,10 +333,7 @@ snd_seq_midisynth_register_port(struct snd_seq_device *dev)
 			kfree(info);
 			return -ENOMEM;
 		}
-		memset(&callbacks, 0, sizeof(callbacks));
-		callbacks.private_data = client;
-		callbacks.allow_input = callbacks.allow_output = 1;
-		client->seq_client = snd_seq_create_kernel_client(card, 0, &callbacks);
+		client->seq_client = snd_seq_create_kernel_client(card, 0);
 		if (client->seq_client < 0) {
 			kfree(client);
 			up(&register_mutex);

sound/core/seq/seq_system.c

@@ -120,8 +120,6 @@ static int event_input_timer(struct snd_seq_event * ev, int direct, void *privat
 /* register our internal client */
 int __init snd_seq_system_client_init(void)
 {
-
-	struct snd_seq_client_callback callbacks;
 	struct snd_seq_port_callback pcallbacks;
 	struct snd_seq_client_info *inf;
 	struct snd_seq_port_info *port;
@@ -134,14 +132,12 @@ int __init snd_seq_system_client_init(void)
 		return -ENOMEM;
 	}
 
-	memset(&callbacks, 0, sizeof(callbacks));
 	memset(&pcallbacks, 0, sizeof(pcallbacks));
 	pcallbacks.owner = THIS_MODULE;
 	pcallbacks.event_input = event_input_timer;
 
 	/* register client */
-	callbacks.allow_input = callbacks.allow_output = 1;
-	sysclient = snd_seq_create_kernel_client(NULL, 0, &callbacks);
+	sysclient = snd_seq_create_kernel_client(NULL, 0);
 
 	/* set our name */
 	inf->client = 0;

sound/core/seq/seq_virmidi.c

@@ -359,7 +359,6 @@ static struct snd_rawmidi_ops snd_virmidi_output_ops = {
 static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev)
 {
 	int client;
-	struct snd_seq_client_callback callbacks;
 	struct snd_seq_port_callback pcallbacks;
 	struct snd_seq_client_info *info;
 	struct snd_seq_port_info *pinfo;
@@ -375,11 +374,7 @@ static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev)
 		goto __error;
 	}
 
-	memset(&callbacks, 0, sizeof(callbacks));
-	callbacks.private_data = rdev;
-	callbacks.allow_input = 1;
-	callbacks.allow_output = 1;
-	client = snd_seq_create_kernel_client(rdev->card, rdev->device, &callbacks);
+	client = snd_seq_create_kernel_client(rdev->card, rdev->device);
 	if (client < 0) {
 		err = client;
 		goto __error;