OBJECT_ATTRIBUTES ObjectAttributes;
NTSTATUS Status;
+ if (!DeviceExtension->PhysicalDeviceObject)
+ return STATUS_SUCCESS;
+
/* Open the software key: HKLM\System\CurrentControlSet\Control\Class\<ClassGUID>\<n> */
Status = IoOpenDeviceRegistryKey(DeviceExtension->PhysicalDeviceObject,
PLUGPLAY_REGKEY_DRIVER,
return STATUS_SUCCESS;
}
+NTSTATUS
+IntDuplicateUnicodeString(
+ IN ULONG Flags,
+ IN PCUNICODE_STRING SourceString,
+ OUT PUNICODE_STRING DestinationString)
+{
+ if (SourceString == NULL ||
+ DestinationString == NULL ||
+ SourceString->Length > SourceString->MaximumLength ||
+ (SourceString->Length == 0 && SourceString->MaximumLength > 0 && SourceString->Buffer == NULL) ||
+ Flags == RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING ||
+ Flags >= 4)
+ {
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ if ((SourceString->Length == 0) &&
+ (Flags != (RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE |
+ RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING)))
+ {
+ DestinationString->Length = 0;
+ DestinationString->MaximumLength = 0;
+ DestinationString->Buffer = NULL;
+ }
+ else
+ {
+ USHORT DestMaxLength = SourceString->Length;
+
+ if (Flags & RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE)
+ DestMaxLength += sizeof(UNICODE_NULL);
+
+ DestinationString->Buffer = ExAllocatePoolWithTag(PagedPool, DestMaxLength, TAG_VIDEO_PORT);
+ if (DestinationString->Buffer == NULL)
+ return STATUS_NO_MEMORY;
+
+ RtlCopyMemory(DestinationString->Buffer, SourceString->Buffer, SourceString->Length);
+ DestinationString->Length = SourceString->Length;
+ DestinationString->MaximumLength = DestMaxLength;
+
+ if (Flags & RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE)
+ DestinationString->Buffer[DestinationString->Length / sizeof(WCHAR)] = 0;
+ }
+
+ return STATUS_SUCCESS;
+}
+
NTSTATUS
NTAPI
IntCreateNewRegistryPath(
OBJECT_ATTRIBUTES ObjectAttributes;
PWCHAR InstanceIdBuffer;
+ if (!DeviceExtension->PhysicalDeviceObject)
+ {
+ Status = IntDuplicateUnicodeString(RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE,
+ &DeviceExtension->RegistryPath,
+ &DeviceExtension->NewRegistryPath);
+ if (!NT_SUCCESS(Status))
+ ERR_(VIDEOPRT, "IntDuplicateUnicodeString() failed with status 0x%lx\n", Status);
+ return Status;
+ }
+
/* Open the hardware key: HKLM\System\CurrentControlSet\Enum\... */
Status = IoOpenDeviceRegistryKey(DeviceExtension->PhysicalDeviceObject,
PLUGPLAY_REGKEY_DEVICE,