platform/x86: samsung-laptop: 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: Corentin Chary <corentin.chary@gmail.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Andy Shevchenko <andy@infradead.org>
Cc: platform-driver-x86@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/samsung-laptop.c

@@ -1280,15 +1280,12 @@ static void samsung_debugfs_exit(struct samsung_laptop *samsung)
 	debugfs_remove_recursive(samsung->debug.root);
 }
 
-static int samsung_debugfs_init(struct samsung_laptop *samsung)
+static void samsung_debugfs_init(struct samsung_laptop *samsung)
 {
-	struct dentry *dent;
+	struct dentry *root;
 
-	samsung->debug.root = debugfs_create_dir("samsung-laptop", NULL);
-	if (!samsung->debug.root) {
-		pr_err("failed to create debugfs directory");
-		goto error_debugfs;
-	}
+	root = debugfs_create_dir("samsung-laptop", NULL);
+	samsung->debug.root = root;
 
 	samsung->debug.f0000_wrapper.data = samsung->f0000_segment;
 	samsung->debug.f0000_wrapper.size = 0xffff;
@@ -1299,60 +1296,24 @@ static int samsung_debugfs_init(struct samsung_laptop *samsung)
 	samsung->debug.sdiag_wrapper.data = samsung->sdiag;
 	samsung->debug.sdiag_wrapper.size = strlen(samsung->sdiag);
 
-	dent = debugfs_create_u16("command", S_IRUGO | S_IWUSR,
-				  samsung->debug.root, &samsung->debug.command);
-	if (!dent)
-		goto error_debugfs;
-
-	dent = debugfs_create_u32("d0", S_IRUGO | S_IWUSR, samsung->debug.root,
+	debugfs_create_u16("command", S_IRUGO | S_IWUSR, root,
+			   &samsung->debug.command);
+	debugfs_create_u32("d0", S_IRUGO | S_IWUSR, root,
 			   &samsung->debug.data.d0);
-	if (!dent)
-		goto error_debugfs;
-
-	dent = debugfs_create_u32("d1", S_IRUGO | S_IWUSR, samsung->debug.root,
+	debugfs_create_u32("d1", S_IRUGO | S_IWUSR, root,
 			   &samsung->debug.data.d1);
-	if (!dent)
-		goto error_debugfs;
-
-	dent = debugfs_create_u16("d2", S_IRUGO | S_IWUSR, samsung->debug.root,
+	debugfs_create_u16("d2", S_IRUGO | S_IWUSR, root,
 			   &samsung->debug.data.d2);
-	if (!dent)
-		goto error_debugfs;
-
-	dent = debugfs_create_u8("d3", S_IRUGO | S_IWUSR, samsung->debug.root,
+	debugfs_create_u8("d3", S_IRUGO | S_IWUSR, root,
 			  &samsung->debug.data.d3);
-	if (!dent)
-		goto error_debugfs;
-
-	dent = debugfs_create_blob("data", S_IRUGO | S_IWUSR,
-				   samsung->debug.root,
+	debugfs_create_blob("data", S_IRUGO | S_IWUSR, root,
 			    &samsung->debug.data_wrapper);
-	if (!dent)
-		goto error_debugfs;
-
-	dent = debugfs_create_blob("f0000_segment", S_IRUSR | S_IWUSR,
-				   samsung->debug.root,
+	debugfs_create_blob("f0000_segment", S_IRUSR | S_IWUSR, root,
 			    &samsung->debug.f0000_wrapper);
-	if (!dent)
-		goto error_debugfs;
-
-	dent = debugfs_create_file("call", S_IFREG | S_IRUGO,
-				   samsung->debug.root, samsung,
+	debugfs_create_file("call", S_IFREG | S_IRUGO, root, samsung,
 			    &samsung_laptop_call_fops);
-	if (!dent)
-		goto error_debugfs;
-
-	dent = debugfs_create_blob("sdiag", S_IRUGO | S_IWUSR,
-				   samsung->debug.root,
+	debugfs_create_blob("sdiag", S_IRUGO | S_IWUSR, root,
 			    &samsung->debug.sdiag_wrapper);
-	if (!dent)
-		goto error_debugfs;
-
-	return 0;
-
-error_debugfs:
-	samsung_debugfs_exit(samsung);
-	return -ENOMEM;
 }
 
 static void samsung_sabi_exit(struct samsung_laptop *samsung)
@@ -1745,9 +1706,7 @@ static int __init samsung_init(void)
 	if (ret)
 		goto error_lid_handling;
 
-	ret = samsung_debugfs_init(samsung);
-	if (ret)
-		goto error_debugfs;
+	samsung_debugfs_init(samsung);
 
 	samsung->pm_nb.notifier_call = samsung_pm_notification;
 	register_pm_notifier(&samsung->pm_nb);
@@ -1755,8 +1714,6 @@ static int __init samsung_init(void)
 	samsung_platform_device = samsung->platform_device;
 	return ret;
 
-error_debugfs:
-	samsung_lid_handling_exit(samsung);
 error_lid_handling:
 	samsung_leds_exit(samsung);
 error_leds: