[PATCH] ntoskrnl.exe: Implement IoOpenDeviceRegistryKey().

[Zebediah Figura]

Needed by many native PnP drivers, including the FA-124 USB driver.

Signed-off-by: Zebediah Figura 
---
 dlls/ntoskrnl.exe/ntoskrnl.exe.spec |  2 +-
 dlls/ntoskrnl.exe/pnp.c             | 29 +++++++++++++++++++++++++++++
 include/ddk/wdm.h                   |  1 +
 3 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index 6b5b127a62..40341d8f0c 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -423,7 +423,7 @@
 @ stdcall IoIsWdmVersionAvailable(long long)
 @ stub IoMakeAssociatedIrp
 @ stub IoOpenDeviceInterfaceRegistryKey
-@ stub IoOpenDeviceRegistryKey
+@ stdcall IoOpenDeviceRegistryKey(ptr long long ptr)
 @ stub IoPageRead
 @ stub IoPnPDeliverServicePowerNotification
 @ stdcall IoQueryDeviceDescription(ptr ptr ptr ptr ptr ptr ptr ptr)
diff --git a/dlls/ntoskrnl.exe/pnp.c b/dlls/ntoskrnl.exe/pnp.c
index 863e1d9d53..2acc7ade47 100644
--- a/dlls/ntoskrnl.exe/pnp.c
+++ b/dlls/ntoskrnl.exe/pnp.c
@@ -844,6 +844,35 @@ NTSTATUS WINAPI IoRegisterDeviceInterface(DEVICE_OBJECT *device, const GUID *cla
     return status;
 }

+/***********************************************************************
+ *           IoOpenDeviceRegistryKey   (NTOSKRNL.EXE.@)
+ */
+NTSTATUS WINAPI IoOpenDeviceRegistryKey( DEVICE_OBJECT *device, ULONG type, ACCESS_MASK access, HANDLE *key )
+{
+    SP_DEVINFO_DATA sp_device = {sizeof(sp_device)};
+    WCHAR device_instance_id[MAX_DEVICE_ID_LEN];
+    NTSTATUS status;
+    HDEVINFO set;
+
+    TRACE("device %p, type %#x, access %#x, key %p.\n", device, type, access, key);
+
+    if ((status = get_device_instance_id( device, device_instance_id )))
+    {
+        ERR("Failed to get device instance ID, error %#x.\n", status);
+        return status;
+    }
+
+    set = SetupDiCreateDeviceInfoList( &GUID_NULL, NULL );
+
+    SetupDiOpenDeviceInfoW( set, device_instance_id, NULL, 0, &sp_device );
+
+    *key = SetupDiOpenDevRegKey( set, &sp_device, DICS_FLAG_GLOBAL, 0, type, access );
+    if (*key == INVALID_HANDLE_VALUE)
+        return GetLastError();
+    SetupDiDestroyDeviceInfoList( set );
+    return STATUS_SUCCESS;
+}
+
 /***********************************************************************
  *           PoSetPowerState   (NTOSKRNL.EXE.@)
  */
diff --git a/include/ddk/wdm.h b/include/ddk/wdm.h
index 53ea9e17cf..b4325cec6c 100644
--- a/include/ddk/wdm.h
+++ b/include/ddk/wdm.h
@@ -1607,6 +1607,7 @@ void      WINAPI IoGetStackLimits(ULONG_PTR*,ULONG_PTR*);
 void      WINAPI IoInitializeIrp(IRP*,USHORT,CCHAR);
 VOID      WINAPI IoInitializeRemoveLockEx(PIO_REMOVE_LOCK,ULONG,ULONG,ULONG,ULONG);
 void      WINAPI IoInvalidateDeviceRelations(PDEVICE_OBJECT,DEVICE_RELATION_TYPE);
+NTSTATUS  WINAPI IoOpenDeviceRegistryKey(DEVICE_OBJECT*,ULONG,ACCESS_MASK,HANDLE*);
 void      WINAPI IoQueueWorkItem(PIO_WORKITEM,PIO_WORKITEM_ROUTINE,WORK_QUEUE_TYPE,void*);
 NTSTATUS  WINAPI IoRegisterDeviceInterface(PDEVICE_OBJECT,const GUID*,PUNICODE_STRING,PUNICODE_STRING);
 void      WINAPI IoReleaseCancelSpinLock(KIRQL);