s390/hypfs: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-s390@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/hypfs/hypfs.h

@@ -43,7 +43,7 @@ int hypfs_diag0c_init(void);
 void hypfs_diag0c_exit(void);
 
 /* Set Partition-Resource Parameter */
-int hypfs_sprp_init(void);
+void hypfs_sprp_init(void);
 void hypfs_sprp_exit(void);
 
 /* debugfs interface */
@@ -69,9 +69,9 @@ struct hypfs_dbfs_file {
 	struct dentry		*dentry;
 };
 
-extern int hypfs_dbfs_init(void);
+extern void hypfs_dbfs_init(void);
 extern void hypfs_dbfs_exit(void);
-extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
+extern void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
 extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
 
 #endif /* _HYPFS_H_ */

arch/s390/hypfs/hypfs_dbfs.c

@@ -78,14 +78,11 @@ static const struct file_operations dbfs_ops = {
 	.unlocked_ioctl = dbfs_ioctl,
 };
 
-int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df)
+void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df)
 {
 	df->dentry = debugfs_create_file(df->name, 0400, dbfs_dir, df,
 					 &dbfs_ops);
-	if (IS_ERR(df->dentry))
-		return PTR_ERR(df->dentry);
 	mutex_init(&df->lock);
-	return 0;
 }
 
 void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df)
@@ -93,10 +90,9 @@ void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df)
 	debugfs_remove(df->dentry);
 }
 
-int hypfs_dbfs_init(void)
+void hypfs_dbfs_init(void)
 {
 	dbfs_dir = debugfs_create_dir("s390_hypfs", NULL);
-	return PTR_ERR_OR_ZERO(dbfs_dir);
 }
 
 void hypfs_dbfs_exit(void)

arch/s390/hypfs/hypfs_diag.c

@@ -440,11 +440,10 @@ __init int hypfs_diag_init(void)
 		pr_err("The hardware system does not support hypfs\n");
 		return -ENODATA;
 	}
-	if (diag204_info_type == DIAG204_INFO_EXT) {
-		rc = hypfs_dbfs_create_file(&dbfs_file_d204);
-		if (rc)
-			return rc;
-	}
+
+	if (diag204_info_type == DIAG204_INFO_EXT)
+		hypfs_dbfs_create_file(&dbfs_file_d204);
+
 	if (MACHINE_IS_LPAR) {
 		rc = diag224_get_name_table();
 		if (rc) {

arch/s390/hypfs/hypfs_diag0c.c

@@ -124,7 +124,8 @@ int __init hypfs_diag0c_init(void)
 {
 	if (!MACHINE_IS_VM)
 		return 0;
-	return hypfs_dbfs_create_file(&dbfs_file_0c);
+	hypfs_dbfs_create_file(&dbfs_file_0c);
+	return 0;
 }
 
 /*

arch/s390/hypfs/hypfs_sprp.c

@@ -137,11 +137,11 @@ static struct hypfs_dbfs_file hypfs_sprp_file = {
 	.unlocked_ioctl = hypfs_sprp_ioctl,
 };
 
-int hypfs_sprp_init(void)
+void hypfs_sprp_init(void)
 {
 	if (!sclp.has_sprp)
-		return 0;
-	return hypfs_dbfs_create_file(&hypfs_sprp_file);
+		return;
+	hypfs_dbfs_create_file(&hypfs_sprp_file);
 }
 
 void hypfs_sprp_exit(void)

arch/s390/hypfs/hypfs_vm.c

@@ -279,7 +279,8 @@ int hypfs_vm_init(void)
 		guest_query = local_guest;
 	else
 		return -EACCES;
-	return hypfs_dbfs_create_file(&dbfs_file_2fc);
+	hypfs_dbfs_create_file(&dbfs_file_2fc);
+	return 0;
 }
 
 void hypfs_vm_exit(void)

arch/s390/hypfs/inode.c

@@ -456,9 +456,8 @@ static int __init hypfs_init(void)
 {
 	int rc;
 
-	rc = hypfs_dbfs_init();
-	if (rc)
-		return rc;
+	hypfs_dbfs_init();
+
 	if (hypfs_diag_init()) {
 		rc = -ENODATA;
 		goto fail_dbfs_exit;
@@ -467,10 +466,7 @@ static int __init hypfs_init(void)
 		rc = -ENODATA;
 		goto fail_hypfs_diag_exit;
 	}
-	if (hypfs_sprp_init()) {
-		rc = -ENODATA;
-		goto fail_hypfs_vm_exit;
-	}
+	hypfs_sprp_init();
 	if (hypfs_diag0c_init()) {
 		rc = -ENODATA;
 		goto fail_hypfs_sprp_exit;
@@ -489,7 +485,6 @@ static int __init hypfs_init(void)
 	hypfs_diag0c_exit();
 fail_hypfs_sprp_exit:
 	hypfs_sprp_exit();
-fail_hypfs_vm_exit:
 	hypfs_vm_exit();
 fail_hypfs_diag_exit:
 	hypfs_diag_exit();