[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>

13 files changed, 14 insertions, 75 deletions

diff --git a/include/sound/seq_kernel.h b/include/sound/seq_kernel.h
index 1b60890..77cf57e 100644
--- a/include/sound/seq_kernel.h
+++ b/include/sound/seq_kernel.h
@@ -60,15 +60,6 @@ typedef union snd_seq_timestamp snd_seq_timestamp_t;
 /* max size of event size */
 #define SNDRV_SEQ_MAX_EVENT_LEN		0x3fffffff
 
-/* call-backs for kernel client */
-
-struct snd_seq_client_callback {
-	void *private_data;
-	unsigned allow_input: 1,
-		 allow_output: 1;
-	/*...*/
-};
-
 /* call-backs for kernel port */
 struct snd_seq_port_callback {
 	struct module *owner;
@@ -84,8 +75,7 @@ struct snd_seq_port_callback {
 };
 
 /* interface for kernel client */
-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);
 int snd_seq_delete_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_dispatch(int client, struct snd_seq_event *ev, int atomic, int hop);
diff --git a/sound/core/seq/oss/seq_oss_init.c b/sound/core/seq/oss/seq_oss_init.c
index 97e2493..cd4139ad 100644
--- a/sound/core/seq/oss/seq_oss_init.c
+++ b/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;
 
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 79199f5..bd8c098 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/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);
 
diff --git a/sound/core/seq/seq_clientmgr.h b/sound/core/seq/seq_clientmgr.h
index 7131d21..450091c 100644
--- a/sound/core/seq/seq_clientmgr.h
+++ b/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);
diff --git a/sound/core/seq/seq_dummy.c b/sound/core/seq/seq_dummy.c
index 8101a47..e7344b6 100644
--- a/sound/core/seq/seq_dummy.c
+++ b/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;
 
diff --git a/sound/core/seq/seq_midi.c b/sound/core/seq/seq_midi.c
index 0a65eb2..512ffdd 100644
--- a/sound/core/seq/seq_midi.c
+++ b/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);
diff --git a/sound/core/seq/seq_system.c b/sound/core/seq/seq_system.c
index 86b1cba..c87c883 100644
--- a/sound/core/seq/seq_system.c
+++ b/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;
diff --git a/sound/core/seq/seq_virmidi.c b/sound/core/seq/seq_virmidi.c
index ea21139..2739f57 100644
--- a/sound/core/seq/seq_virmidi.c
+++ b/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;
diff --git a/sound/drivers/opl3/opl3_seq.c b/sound/drivers/opl3/opl3_seq.c
index 1886b29..582ff63 100644
--- a/sound/drivers/opl3/opl3_seq.c
+++ b/sound/drivers/opl3/opl3_seq.c
@@ -219,7 +219,6 @@ static int snd_opl3_seq_new_device(struct snd_seq_device *dev)
 {
 	struct snd_opl3 *opl3;
 	int client;
-	struct snd_seq_client_callback callbacks;
 	struct snd_seq_client_info cinfo;
 	int opl_ver;
 
@@ -232,11 +231,8 @@ static int snd_opl3_seq_new_device(struct snd_seq_device *dev)
 	opl3->seq_client = -1;
 
 	/* allocate new client */
-	memset(&callbacks, 0, sizeof(callbacks));
-	callbacks.private_data = opl3;
-	callbacks.allow_output = callbacks.allow_input = 1;
 	client = opl3->seq_client =
-	    snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num, &callbacks);
+		snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num);
 	if (client < 0)
 		return client;
 
diff --git a/sound/drivers/opl4/opl4_seq.c b/sound/drivers/opl4/opl4_seq.c
index bfd68e4..a69117d 100644
--- a/sound/drivers/opl4/opl4_seq.c
+++ b/sound/drivers/opl4/opl4_seq.c
@@ -127,7 +127,6 @@ static int snd_opl4_seq_new_device(struct snd_seq_device *dev)
 {
 	struct snd_opl4 *opl4;
 	int client;
-	struct snd_seq_client_callback callbacks;
 	struct snd_seq_client_info cinfo;
 	struct snd_seq_port_callback pcallbacks;
 
@@ -144,10 +143,7 @@ static int snd_opl4_seq_new_device(struct snd_seq_device *dev)
 	opl4->chset->private_data = opl4;
 
 	/* allocate new client */
-	memset(&callbacks, 0, sizeof(callbacks));
-	callbacks.private_data = opl4;
-	callbacks.allow_output = callbacks.allow_input = 1;
-	client = snd_seq_create_kernel_client(opl4->card, opl4->seq_dev_num, &callbacks);
+	client = snd_seq_create_kernel_client(opl4->card, opl4->seq_dev_num);
 	if (client < 0) {
 		snd_midi_channel_free_set(opl4->chset);
 		return client;
diff --git a/sound/isa/gus/gus_synth.c b/sound/isa/gus/gus_synth.c
index 9c7d698..6464488 100644
--- a/sound/isa/gus/gus_synth.c
+++ b/sound/isa/gus/gus_synth.c
@@ -214,7 +214,6 @@ static int snd_gus_synth_new_device(struct snd_seq_device *dev)
 {
 	struct snd_gus_card *gus;
 	int client, i;
-	struct snd_seq_client_callback callbacks;
 	struct snd_seq_client_info *cinfo;
 	struct snd_seq_port_subscribe sub;
 	struct snd_iwffff_ops *iwops;
@@ -233,11 +232,8 @@ static int snd_gus_synth_new_device(struct snd_seq_device *dev)
 		return -ENOMEM;
 
 	/* allocate new client */
-	memset(&callbacks, 0, sizeof(callbacks));
-	callbacks.private_data = gus;
-	callbacks.allow_output = callbacks.allow_input = 1;
 	client = gus->gf1.seq_client =
-			snd_seq_create_kernel_client(gus->card, 1, &callbacks);
+		snd_seq_create_kernel_client(gus->card, 1);
 	if (client < 0) {
 		kfree(cinfo);
 		return client;
diff --git a/sound/pci/trident/trident_synth.c b/sound/pci/trident/trident_synth.c
index a49682e..e31055a 100644
--- a/sound/pci/trident/trident_synth.c
+++ b/sound/pci/trident/trident_synth.c
@@ -934,7 +934,6 @@ static int snd_trident_synth_new_device(struct snd_seq_device *dev)
 {
 	struct snd_trident *trident;
 	int client, i;
-	struct snd_seq_client_callback callbacks;
 	struct snd_seq_client_info cinfo;
 	struct snd_seq_port_subscribe sub;
 	struct snd_simple_ops *simpleops;
@@ -947,11 +946,8 @@ static int snd_trident_synth_new_device(struct snd_seq_device *dev)
 	trident->synth.seq_client = -1;
 
 	/* allocate new client */
-	memset(&callbacks, 0, sizeof(callbacks));
-	callbacks.private_data = trident;
-	callbacks.allow_output = callbacks.allow_input = 1;
 	client = trident->synth.seq_client =
-	    snd_seq_create_kernel_client(trident->card, 1, &callbacks);
+		snd_seq_create_kernel_client(trident->card, 1);
 	if (client < 0)
 		return client;
 
diff --git a/sound/synth/emux/emux_seq.c b/sound/synth/emux/emux_seq.c
index f5a832f..b7129c5 100644
--- a/sound/synth/emux/emux_seq.c
+++ b/sound/synth/emux/emux_seq.c
@@ -347,17 +347,11 @@ snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info)
 static int
 get_client(struct snd_card *card, int index, char *name)
 {
-	struct snd_seq_client_callback callbacks;
 	struct snd_seq_client_info cinfo;
 	int client;
 
-	memset(&callbacks, 0, sizeof(callbacks));
-	callbacks.private_data = NULL;
-	callbacks.allow_input = 1;
-	callbacks.allow_output = 1;
-
 	/* Find a free client, start from 1 as the MPU expects to use 0 */
-	client = snd_seq_create_kernel_client(card, index, &callbacks);
+	client = snd_seq_create_kernel_client(card, index);
 	if (client < 0)
 		return client;