scsi: target: Make iscsit_register_transport() return void

This function always returns 0. We can make it return void to simplify the
code. Also, no caller ever checks the return value of this function.

Link: https://lore.kernel.org/r/20200803150008.83920-1-maxg@mellanox.com
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/target/iscsi/iscsi_target_transport.c

@@ -31,7 +31,7 @@ void iscsit_put_transport(struct iscsit_transport *t)
 	module_put(t->owner);
 }
 
-int iscsit_register_transport(struct iscsit_transport *t)
+void iscsit_register_transport(struct iscsit_transport *t)
 {
 	INIT_LIST_HEAD(&t->t_node);
 
@@ -40,8 +40,6 @@ int iscsit_register_transport(struct iscsit_transport *t)
 	mutex_unlock(&transport_mutex);
 
 	pr_debug("Registered iSCSI transport: %s\n", t->name);
-
-	return 0;
 }
 EXPORT_SYMBOL(iscsit_register_transport);
 

include/target/iscsi/iscsi_transport.h

@@ -43,7 +43,7 @@ static inline void *iscsit_priv_cmd(struct iscsi_cmd *cmd)
  * From iscsi_target_transport.c
  */
 
-extern int iscsit_register_transport(struct iscsit_transport *);
+extern void iscsit_register_transport(struct iscsit_transport *);
 extern void iscsit_unregister_transport(struct iscsit_transport *);
 extern struct iscsit_transport *iscsit_get_transport(int);
 extern void iscsit_put_transport(struct iscsit_transport *);