orangefs: 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: Mike Marshall <hubcap@omnibond.com>
Cc: Martin Brandenburg <martin@omnibond.com>
Cc: devel@lists.orangefs.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20190612152204.GA17511@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/orangefs/orangefs-debugfs.c

@@ -99,7 +99,6 @@ static char *debug_help_string;
 static char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
 static char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
 
-static struct dentry *help_file_dentry;
 static struct dentry *client_debug_dentry;
 static struct dentry *debug_dir;
 
@@ -183,20 +182,9 @@ int orangefs_debugfs_init(int debug_mask)
 		(unsigned long long)orangefs_gossip_debug_mask);
 
 	debug_dir = debugfs_create_dir("orangefs", NULL);
-	if (!debug_dir) {
-		pr_info("%s: debugfs_create_dir failed.\n", __func__);
-		goto out;
-	}
 
-	help_file_dentry = debugfs_create_file(ORANGEFS_KMOD_DEBUG_HELP_FILE,
-				  0444,
-				  debug_dir,
-				  debug_help_string,
-				  &debug_help_fops);
-	if (!help_file_dentry) {
-		pr_info("%s: debugfs_create_file failed.\n", __func__);
-		goto out;
-	}
+	debugfs_create_file(ORANGEFS_KMOD_DEBUG_HELP_FILE, 0444, debug_dir,
+			    debug_help_string, &debug_help_fops);
 
 	orangefs_debug_disabled = 0;
 
@@ -230,17 +218,8 @@ static int orangefs_kernel_debug_init(void)
 		pr_info("%s: overflow 1!\n", __func__);
 	}
 
-	ret = debugfs_create_file(ORANGEFS_KMOD_DEBUG_FILE,
-				  0444,
-				  debug_dir,
-				  k_buffer,
-				  &kernel_debug_fops);
-	if (!ret) {
-		pr_info("%s: failed to create %s.\n",
-			__func__,
-			ORANGEFS_KMOD_DEBUG_FILE);
-		goto out;
-	}
+	debugfs_create_file(ORANGEFS_KMOD_DEBUG_FILE, 0444, debug_dir, k_buffer,
+			    &kernel_debug_fops);
 
 	rc = 0;
 
@@ -353,12 +332,6 @@ static int orangefs_client_debug_init(void)
 						  debug_dir,
 						  c_buffer,
 						  &kernel_debug_fops);
-	if (!client_debug_dentry) {
-		pr_info("%s: failed to create updated %s.\n",
-			__func__,
-			ORANGEFS_CLIENT_DEBUG_FILE);
-		goto out;
-	}
 
 	rc = 0;