ACPI: 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.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/acpi/acpi_dbg.c b/drivers/acpi/acpi_dbg.c
index a2dcd62..f3bca44 100644
--- a/drivers/acpi/acpi_dbg.c
+++ b/drivers/acpi/acpi_dbg.c
@@ -752,11 +752,6 @@ int __init acpi_aml_init(void)
 {
 	int ret = 0;
 
-	if (!acpi_debugfs_dir) {
-		ret = -ENOENT;
-		goto err_exit;
-	}
-
 	/* Initialize AML IO interface */
 	mutex_init(&acpi_aml_io.lock);
 	init_waitqueue_head(&acpi_aml_io.wait);
@@ -766,10 +761,6 @@ int __init acpi_aml_init(void)
 					      S_IFREG | S_IRUGO | S_IWUSR,
 					      acpi_debugfs_dir, NULL,
 					      &acpi_aml_operations);
-	if (acpi_aml_dentry == NULL) {
-		ret = -ENODEV;
-		goto err_exit;
-	}
 	ret = acpi_register_debugger(THIS_MODULE, &acpi_aml_debugger);
 	if (ret)
 		goto err_fs;
@@ -788,10 +779,8 @@ void __exit acpi_aml_exit(void)
 {
 	if (acpi_aml_initialized) {
 		acpi_unregister_debugger(&acpi_aml_debugger);
-		if (acpi_aml_dentry) {
-			debugfs_remove(acpi_aml_dentry);
-			acpi_aml_dentry = NULL;
-		}
+		debugfs_remove(acpi_aml_dentry);
+		acpi_aml_dentry = NULL;
 		acpi_aml_initialized = false;
 	}
 }