qcacmn: remove return value of qdf_debugfs_create_u*

According to Kernel comment, no one checks the return value of routines:
debugfs_create_u8
debugfs_create_u16
debugfs_create_u32
debugfs_create_u64
debugfs_create_atomic_t
so remove return value of related qdf api.

Change-Id: I7d260bccfce463dddae963c54a776813df116eac
CRs-Fixed: 2666506

qdf/inc/qdf_debugfs.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2020 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -144,11 +144,10 @@ void qdf_debugfs_write(qdf_debugfs_file_t file, const uint8_t *buf,
  * @parent: parent node. If NULL, defaults to base 'qdf_debugfs_root'
  * @value: pointer to a u8 variable (global/static)
  *
- * Return: dentry for the file; NULL in case of failure.
- *
+ * Return: None
  */
-qdf_dentry_t qdf_debugfs_create_u8(const char *name, uint16_t mode,
-				   qdf_dentry_t parent, u8 *value);
+void qdf_debugfs_create_u8(const char *name, uint16_t mode,
+			   qdf_dentry_t parent, u8 *value);
 
 /**
  * qdf_debugfs_create_u16() - create a debugfs file for a u16 variable
@@ -157,11 +156,10 @@ qdf_dentry_t qdf_debugfs_create_u8(const char *name, uint16_t mode,
  * @parent: parent node. If NULL, defaults to base 'qdf_debugfs_root'
  * @value: pointer to a u16 variable (global/static)
  *
- * Return: dentry for the file; NULL in case of failure.
- *
+ * Return: None
  */
-qdf_dentry_t qdf_debugfs_create_u16(const char *name, uint16_t mode,
-				    qdf_dentry_t parent, u16 *value);
+void qdf_debugfs_create_u16(const char *name, uint16_t mode,
+			    qdf_dentry_t parent, u16 *value);
 
 /**
  * qdf_debugfs_create_u32() - create a debugfs file for a u32 variable
@@ -170,11 +168,10 @@ qdf_dentry_t qdf_debugfs_create_u16(const char *name, uint16_t mode,
  * @parent: parent node. If NULL, defaults to base 'qdf_debugfs_root'
  * @value: pointer to a u32 variable (global/static)
  *
- * Return: dentry for the file; NULL in case of failure.
- *
+ * Return: None
  */
-qdf_dentry_t qdf_debugfs_create_u32(const char *name, uint16_t mode,
-				    qdf_dentry_t parent, u32 *value);
+void qdf_debugfs_create_u32(const char *name, uint16_t mode,
+			    qdf_dentry_t parent, u32 *value);
 
 /**
  * qdf_debugfs_create_u64() - create a debugfs file for a u64 variable
@@ -183,11 +180,10 @@ qdf_dentry_t qdf_debugfs_create_u32(const char *name, uint16_t mode,
  * @parent: parent node. If NULL, defaults to base 'qdf_debugfs_root'
  * @value: pointer to a u64 variable (global/static)
  *
- * Return: dentry for the file; NULL in case of failure.
- *
+ * Return: None
  */
-qdf_dentry_t qdf_debugfs_create_u64(const char *name, uint16_t mode,
-				    qdf_dentry_t parent, u64 *value);
+void qdf_debugfs_create_u64(const char *name, uint16_t mode,
+			    qdf_dentry_t parent, u64 *value);
 
 /**
  * qdf_debugfs_create_atomic() - create a debugfs file for an atomic variable
@@ -196,12 +192,11 @@ qdf_dentry_t qdf_debugfs_create_u64(const char *name, uint16_t mode,
  * @parent: parent node. If NULL, defaults to base 'qdf_debugfs_root'
  * @value: pointer to an atomic variable (global/static)
  *
- * Return: dentry for the file; NULL in case of failure.
- *
+ * Return: None
  */
-qdf_dentry_t qdf_debugfs_create_atomic(const char *name, uint16_t mode,
-				       qdf_dentry_t parent,
-				       qdf_atomic_t *value);
+void qdf_debugfs_create_atomic(const char *name, uint16_t mode,
+			       qdf_dentry_t parent,
+			       qdf_atomic_t *value);
 
 /**
  * qdf_debugfs_create_string() - create a debugfs file for a string
@@ -320,43 +315,38 @@ static inline void qdf_debugfs_write(qdf_debugfs_file_t file,
 {
 }
 
-static inline qdf_dentry_t qdf_debugfs_create_u8(const char *name,
-						 uint16_t mode,
-						 qdf_dentry_t parent, u8 *value)
+static inline void qdf_debugfs_create_u8(const char *name,
+					 uint16_t mode,
+					 qdf_dentry_t parent, u8 *value)
 {
-	return NULL;
 }
 
-static inline qdf_dentry_t qdf_debugfs_create_u16(const char *name,
-						  uint16_t mode,
-						  qdf_dentry_t parent,
-						  u16 *value)
+static inline void qdf_debugfs_create_u16(const char *name,
+					  uint16_t mode,
+					  qdf_dentry_t parent,
+					  u16 *value)
 {
-	return NULL;
 }
 
-static inline qdf_dentry_t qdf_debugfs_create_u32(const char *name,
-						  uint16_t mode,
-						  qdf_dentry_t parent,
-						  u32 *value)
+static inline void qdf_debugfs_create_u32(const char *name,
+					  uint16_t mode,
+					  qdf_dentry_t parent,
+					  u32 *value)
 {
-	return NULL;
 }
 
-static inline qdf_dentry_t qdf_debugfs_create_u64(const char *name,
-						  uint16_t mode,
-						  qdf_dentry_t parent,
-						  u64 *value)
+static inline void qdf_debugfs_create_u64(const char *name,
+					  uint16_t mode,
+					  qdf_dentry_t parent,
+					  u64 *value)
 {
-	return NULL;
 }
 
-static inline qdf_dentry_t qdf_debugfs_create_atomic(const char *name,
-						     uint16_t mode,
-						     qdf_dentry_t parent,
-						     qdf_atomic_t *value)
+static inline void qdf_debugfs_create_atomic(const char *name,
+					     uint16_t mode,
+					     qdf_dentry_t parent,
+					     qdf_atomic_t *value)
 {
-	return NULL;
 }
 
 static inline qdf_dentry_t debugfs_create_string(const char *name,

qdf/linux/src/qdf_debugfs.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2020 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -331,84 +331,88 @@ qdf_dentry_t qdf_debugfs_create_file(const char *name, uint16_t mode,
 }
 qdf_export_symbol(qdf_debugfs_create_file);
 
-qdf_dentry_t qdf_debugfs_create_u8(const char *name, uint16_t mode,
-				   qdf_dentry_t parent, u8 *value)
+void qdf_debugfs_create_u8(const char *name, uint16_t mode,
+			   qdf_dentry_t parent, u8 *value)
 {
 	umode_t filemode;
 
 	if (!name)
-		return NULL;
+		return;
 
 	if (!parent)
 		parent = qdf_debugfs_get_root();
 
 	filemode = qdf_debugfs_get_filemode(mode);
-	return debugfs_create_u8(name, filemode, parent, value);
+	debugfs_create_u8(name, filemode, parent, value);
 }
 
-qdf_dentry_t qdf_debugfs_create_u16(const char *name, uint16_t mode,
-				    qdf_dentry_t parent, u16 *value)
+void qdf_debugfs_create_u16(const char *name, uint16_t mode,
+			    qdf_dentry_t parent, u16 *value)
 {
 	umode_t filemode;
 
 	if (!name)
-		return NULL;
+		return;
 
 	if (!parent)
 		parent = qdf_debugfs_get_root();
 
 	filemode = qdf_debugfs_get_filemode(mode);
-	return debugfs_create_u16(name, filemode, parent, value);
+	debugfs_create_u16(name, filemode, parent, value);
 }
+
 qdf_export_symbol(qdf_debugfs_create_u16);
 
-qdf_dentry_t qdf_debugfs_create_u32(const char *name,
-				    uint16_t mode,
-				    qdf_dentry_t parent, u32 *value)
+void qdf_debugfs_create_u32(const char *name,
+			    uint16_t mode,
+			    qdf_dentry_t parent, u32 *value)
 {
 	umode_t filemode;
 
 	if (!name)
-		return NULL;
+		return;
 
 	if (!parent)
 		parent = qdf_debugfs_get_root();
 
 	filemode = qdf_debugfs_get_filemode(mode);
-	return debugfs_create_u32(name, filemode, parent, value);
+	debugfs_create_u32(name, filemode, parent, value);
 }
+
 qdf_export_symbol(qdf_debugfs_create_u32);
 
-qdf_dentry_t qdf_debugfs_create_u64(const char *name, uint16_t mode,
-				    qdf_dentry_t parent, u64 *value)
+void qdf_debugfs_create_u64(const char *name, uint16_t mode,
+			    qdf_dentry_t parent, u64 *value)
 {
 	umode_t filemode;
 
 	if (!name)
-		return NULL;
+		return;
 
 	if (!parent)
 		parent = qdf_debugfs_get_root();
 
 	filemode = qdf_debugfs_get_filemode(mode);
-	return debugfs_create_u64(name, filemode, parent, value);
+	debugfs_create_u64(name, filemode, parent, value);
 }
+
 qdf_export_symbol(qdf_debugfs_create_u64);
 
-qdf_dentry_t qdf_debugfs_create_atomic(const char *name, uint16_t mode,
-				       qdf_dentry_t parent, qdf_atomic_t *value)
+void qdf_debugfs_create_atomic(const char *name, uint16_t mode,
+			       qdf_dentry_t parent, qdf_atomic_t *value)
 {
 	umode_t filemode;
 
 	if (!name)
-		return NULL;
+		return;
 
 	if (!parent)
 		parent = qdf_debugfs_get_root();
 
 	filemode = qdf_debugfs_get_filemode(mode);
-	return debugfs_create_atomic_t(name, filemode, parent, value);
+	debugfs_create_atomic_t(name, filemode, parent, value);
 }
+
 qdf_export_symbol(qdf_debugfs_create_atomic);
 
 static int qdf_debugfs_string_show(struct seq_file *seq, void *pos)