From c0d168b15aeb3a5de1d71bc39d3f523fd71b18b7 Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Thu, 22 Apr 2010 20:35:58 +0000
Subject: [PATCH 1/1] [PCI] - Forward IRPs to our PDO instead of just
 completing them - Handle IRP_MN_START_DEVICE on the way back up the stack
 (allows the PDO code to assign resources to the bus) - Add some synchronous
 IRP forwarding copied from i8042prt

svn path=/trunk/; revision=46996
---
 reactos/drivers/bus/pci/fdo.c | 86 ++++++++++++++++++++++++++---------
 1 file changed, 65 insertions(+), 21 deletions(-)

diff --git a/reactos/drivers/bus/pci/fdo.c b/reactos/drivers/bus/pci/fdo.c
index 8072a89b455..b6753e10a5e 100644
--- a/reactos/drivers/bus/pci/fdo.c
+++ b/reactos/drivers/bus/pci/fdo.c
@@ -16,6 +16,46 @@
 
 /*** PRIVATE *****************************************************************/
 
+static IO_COMPLETION_ROUTINE ForwardIrpAndWaitCompletion;
+
+static NTSTATUS NTAPI
+ForwardIrpAndWaitCompletion(
+	IN PDEVICE_OBJECT DeviceObject,
+	IN PIRP Irp,
+	IN PVOID Context)
+{
+	UNREFERENCED_PARAMETER(DeviceObject);
+	if (Irp->PendingReturned)
+		KeSetEvent((PKEVENT)Context, IO_NO_INCREMENT, FALSE);
+	return STATUS_MORE_PROCESSING_REQUIRED;
+}
+
+NTSTATUS NTAPI
+ForwardIrpAndWait(
+	IN PDEVICE_OBJECT DeviceObject,
+	IN PIRP Irp)
+{
+	KEVENT Event;
+	NTSTATUS Status;
+	PDEVICE_OBJECT LowerDevice = ((PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->Ldo;
+	ASSERT(LowerDevice);
+
+	KeInitializeEvent(&Event, NotificationEvent, FALSE);
+	IoCopyCurrentIrpStackLocationToNext(Irp);
+
+	IoSetCompletionRoutine(Irp, ForwardIrpAndWaitCompletion, &Event, TRUE, TRUE, TRUE);
+
+	Status = IoCallDriver(LowerDevice, Irp);
+	if (Status == STATUS_PENDING)
+	{
+		Status = KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
+		if (NT_SUCCESS(Status))
+			Status = Irp->IoStatus.Status;
+	}
+
+	return Status;
+}
+
 static NTSTATUS
 FdoLocateChildDevice(
   PPCI_DEVICE *Device,
@@ -466,7 +506,7 @@ FdoPnpControl(
 {
   PFDO_DEVICE_EXTENSION DeviceExtension;
   PIO_STACK_LOCATION IrpSp;
-  NTSTATUS Status;
+  NTSTATUS Status = Irp->IoStatus.Status;
 
   DPRINT("Called\n");
 
@@ -492,8 +532,13 @@ FdoPnpControl(
     break;
 #endif
   case IRP_MN_QUERY_DEVICE_RELATIONS:
+    if (IrpSp->Parameters.QueryDeviceRelations.Type != BusRelations)
+        break;
+
     Status = FdoQueryBusRelations(DeviceObject, Irp, IrpSp);
-    break;
+    Irp->IoStatus.Status = Status;
+    IoCompleteRequest(Irp, IO_NO_INCREMENT);
+    return Status;
 #if 0
   case IRP_MN_QUERY_PNP_DEVICE_STATE:
     Status = STATUS_NOT_IMPLEMENTED;
@@ -513,38 +558,37 @@ FdoPnpControl(
 #endif
   case IRP_MN_START_DEVICE:
     DPRINT("IRP_MN_START_DEVICE received\n");
-    Status = FdoStartDevice(DeviceObject, Irp);
-    break;
+    Status = ForwardIrpAndWait(DeviceObject, Irp);
+    if (NT_SUCCESS(Status))
+       Status = FdoStartDevice(DeviceObject, Irp);
+
+    Irp->IoStatus.Status = Status;
+    IoCompleteRequest(Irp, IO_NO_INCREMENT);
+    return Status;
   case IRP_MN_STOP_DEVICE:
     /* Currently not supported */
     Status = STATUS_UNSUCCESSFUL;
-    break;
+    Irp->IoStatus.Status = Status;
+    IoCompleteRequest(Irp, IO_NO_INCREMENT);
+    return Status;
 #if 0
   case IRP_MN_SURPRISE_REMOVAL:
     Status = STATUS_NOT_IMPLEMENTED;
     break;
 #endif
+  case IRP_MN_FILTER_RESOURCE_REQUIREMENTS:
+    break;
+  case IRP_MN_REMOVE_DEVICE:
+    DPRINT1("IRP_MN_REMOVE_DEVICE is UNIMPLEMENTED!\n");
+    break;
   default:
     DPRINT1("Unknown IOCTL 0x%lx\n", IrpSp->MinorFunction);
-    /* fall through */
-
-  case IRP_MN_FILTER_RESOURCE_REQUIREMENTS:
-    /*
-     * Do NOT complete the IRP as it will be processed by the lower
-     * device object, which will complete the IRP
-     */
-    IoSkipCurrentIrpStackLocation(Irp);
-    Status = IoCallDriver(DeviceExtension->Ldo, Irp);
-    return Status;
     break;
   }
 
-
-  if (Status != STATUS_PENDING) {
-    if (Status != STATUS_NOT_IMPLEMENTED)
-      Irp->IoStatus.Status = Status;
-    IoCompleteRequest(Irp, IO_NO_INCREMENT);
-  }
+  Irp->IoStatus.Status = Status;
+  IoSkipCurrentIrpStackLocation(Irp);
+  Status = IoCallDriver(DeviceExtension->Ldo, Irp);
 
   DPRINT("Leaving. Status 0x%X\n", Status);
 
-- 
2.17.1