From 9638666d84a238a98595b51e6f68981ba4688bd8 Mon Sep 17 00:00:00 2001
From: Eric Kohl <eric.kohl@reactos.org>
Date: Sun, 4 May 2025 17:28:37 +0200
Subject: [PATCH] [MOUCLASS] Only set the device interface state if we have an
 interface name

---
 drivers/input/mouclass/mouclass.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/input/mouclass/mouclass.c b/drivers/input/mouclass/mouclass.c
index 564f8ff62a6..d123508ef00 100644
--- a/drivers/input/mouclass/mouclass.c
+++ b/drivers/input/mouclass/mouclass.c
@@ -840,7 +840,8 @@ ClassPnp(
 			}
 			else
 				DeviceExtension->FileHandle = NULL;
-			IoSetDeviceInterfaceState(&DeviceExtension->InterfaceName, TRUE);
+			if (DeviceExtension->InterfaceName.Length != 0)
+				IoSetDeviceInterfaceState(&DeviceExtension->InterfaceName, TRUE);
 			Irp->IoStatus.Status = Status;
 			IoCompleteRequest(Irp, IO_NO_INCREMENT);
 			return Status;
@@ -855,7 +856,8 @@ ClassPnp(
 			break;
 
         case IRP_MN_REMOVE_DEVICE:
-			IoSetDeviceInterfaceState(&DeviceExtension->InterfaceName, FALSE);
+			if (DeviceExtension->InterfaceName.Length != 0)
+				IoSetDeviceInterfaceState(&DeviceExtension->InterfaceName, FALSE);
             if (DeviceExtension->FileHandle)
 			{
 				ZwClose(DeviceExtension->FileHandle);