Better resources handling in serial driver.

[reactos.git] / reactos / drivers / bus / serenum / fdo.c

diff --git a/reactos/drivers/bus/serenum/fdo.c b/reactos/drivers/bus/serenum/fdo.c
index d9c9374..d394990 100644 (file)
--- a/reactos/drivers/bus/serenum/fdo.c
+++ b/reactos/drivers/bus/serenum/fdo.c
@@ -54,7 +54,6 @@ SerenumAddDevice(
        DeviceExtension->Common.PnpState = dsStopped;
        DeviceExtension->Pdo = Pdo;
        IoInitializeRemoveLock(&DeviceExtension->RemoveLock, SERENUM_TAG, 0, 0);
-       Fdo->Flags |= DO_POWER_PAGABLE;
        Status = IoAttachDeviceToDeviceStackSafe(Fdo, Pdo, &DeviceExtension->LowerDevice);
        if (!NT_SUCCESS(Status))
        {
@@ -62,7 +61,12 @@ SerenumAddDevice(
                IoDeleteDevice(Fdo);
                return Status;
        }
-       Fdo->Flags |= DO_BUFFERED_IO;
+       if (DeviceExtension->LowerDevice->Flags & DO_POWER_PAGABLE)
+               Fdo->Flags |= DO_POWER_PAGABLE;
+       if (DeviceExtension->LowerDevice->Flags & DO_BUFFERED_IO)
+               Fdo->Flags |= DO_BUFFERED_IO;
+       if (DeviceExtension->LowerDevice->Flags & DO_DIRECT_IO)
+               Fdo->Flags |= DO_DIRECT_IO;
        Fdo->Flags &= ~DO_DEVICE_INITIALIZING;
 
        return STATUS_SUCCESS;