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[ISAPNP] Extract function to create DOs

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This commit is contained in:
Hervé Poussineau 2020-03-16 18:07:24 +01:00
parent d0c7bd98c7
commit 89aff07a67
3 changed files with 74 additions and 56 deletions
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57
drivers/bus/isapnp/fdo.c
View file

@ -44,13 +44,8 @@ IsaFdoQueryDeviceRelations(
IN PIRP Irp, IN PIRP Irp,
IN PIO_STACK_LOCATION IrpSp) IN PIO_STACK_LOCATION IrpSp)
{ {
PISAPNP_PDO_EXTENSION PdoExt;
NTSTATUS Status; NTSTATUS Status;
PLIST_ENTRY CurrentEntry;
PISAPNP_LOGICAL_DEVICE IsaDevice;
PDEVICE_RELATIONS DeviceRelations;
KIRQL OldIrql; KIRQL OldIrql;
ULONG i = 0;
if (IrpSp->Parameters.QueryDeviceRelations.Type != BusRelations) if (IrpSp->Parameters.QueryDeviceRelations.Type != BusRelations)
return Irp->IoStatus.Status; return Irp->IoStatus.Status;
@ -64,57 +59,7 @@ IsaFdoQueryDeviceRelations(
return Status; return Status;
} }
DeviceRelations = ExAllocatePool(NonPagedPool, return IsaPnpFillDeviceRelations(FdoExt, Irp);
sizeof(DEVICE_RELATIONS) + sizeof(DEVICE_OBJECT) * (FdoExt->DeviceCount - 1));
if (!DeviceRelations)
{
return STATUS_NO_MEMORY;
}
CurrentEntry = FdoExt->DeviceListHead.Flink;
while (CurrentEntry != &FdoExt->DeviceListHead)
{
IsaDevice = CONTAINING_RECORD(CurrentEntry, ISAPNP_LOGICAL_DEVICE, ListEntry);
if (!IsaDevice->Pdo)
{
Status = IoCreateDevice(FdoExt->DriverObject,
sizeof(ISAPNP_PDO_EXTENSION),
NULL,
FILE_DEVICE_CONTROLLER,
FILE_DEVICE_SECURE_OPEN | FILE_AUTOGENERATED_DEVICE_NAME,
FALSE,
&IsaDevice->Pdo);
if (!NT_SUCCESS(Status))
{
break;
}
IsaDevice->Pdo->Flags &= ~DO_DEVICE_INITIALIZING;
//Device->Pdo->Flags |= DO_POWER_PAGABLE;
PdoExt = (PISAPNP_PDO_EXTENSION)IsaDevice->Pdo->DeviceExtension;
RtlZeroMemory(PdoExt, sizeof(ISAPNP_PDO_EXTENSION));
PdoExt->Common.IsFdo = FALSE;
PdoExt->Common.Self = IsaDevice->Pdo;
PdoExt->Common.State = dsStopped;
PdoExt->IsaPnpDevice = IsaDevice;
}
DeviceRelations->Objects[i++] = IsaDevice->Pdo;
ObReferenceObject(IsaDevice->Pdo);
CurrentEntry = CurrentEntry->Flink;
}
DeviceRelations->Count = FdoExt->DeviceCount;
Irp->IoStatus.Information = (ULONG_PTR)DeviceRelations;
return STATUS_SUCCESS;
} }
NTSTATUS NTSTATUS

67
drivers/bus/isapnp/isapnp.c
View file

@ -10,6 +10,73 @@
#define NDEBUG #define NDEBUG
#include <debug.h> #include <debug.h>
NTSTATUS
NTAPI
IsaPnpFillDeviceRelations(
IN PISAPNP_FDO_EXTENSION FdoExt,
IN PIRP Irp)
{
PISAPNP_PDO_EXTENSION PdoExt;
NTSTATUS Status = STATUS_SUCCESS;
PLIST_ENTRY CurrentEntry;
PISAPNP_LOGICAL_DEVICE IsaDevice;
PDEVICE_RELATIONS DeviceRelations;
ULONG i = 0;
DeviceRelations = ExAllocatePool(NonPagedPool,
sizeof(DEVICE_RELATIONS) + sizeof(DEVICE_OBJECT) * FdoExt->DeviceCount);
if (!DeviceRelations)
{
return STATUS_NO_MEMORY;
}
CurrentEntry = FdoExt->DeviceListHead.Flink;
while (CurrentEntry != &FdoExt->DeviceListHead)
{
IsaDevice = CONTAINING_RECORD(CurrentEntry, ISAPNP_LOGICAL_DEVICE, ListEntry);
if (!IsaDevice->Pdo)
{
Status = IoCreateDevice(FdoExt->DriverObject,
sizeof(ISAPNP_PDO_EXTENSION),
NULL,
FILE_DEVICE_CONTROLLER,
FILE_DEVICE_SECURE_OPEN | FILE_AUTOGENERATED_DEVICE_NAME,
FALSE,
&IsaDevice->Pdo);
if (!NT_SUCCESS(Status))
{
break;
}
IsaDevice->Pdo->Flags &= ~DO_DEVICE_INITIALIZING;
//Device->Pdo->Flags |= DO_POWER_PAGABLE;
PdoExt = (PISAPNP_PDO_EXTENSION)IsaDevice->Pdo->DeviceExtension;
RtlZeroMemory(PdoExt, sizeof(ISAPNP_PDO_EXTENSION));
PdoExt->Common.IsFdo = FALSE;
PdoExt->Common.Self = IsaDevice->Pdo;
PdoExt->Common.State = dsStopped;
PdoExt->IsaPnpDevice = IsaDevice;
}
DeviceRelations->Objects[i++] = IsaDevice->Pdo;
ObReferenceObject(IsaDevice->Pdo);
CurrentEntry = CurrentEntry->Flink;
}
DeviceRelations->Count = i;
Irp->IoStatus.Information = (ULONG_PTR)DeviceRelations;
return Status;
}
static IO_COMPLETION_ROUTINE ForwardIrpCompletion; static IO_COMPLETION_ROUTINE ForwardIrpCompletion;
static static

6
drivers/bus/isapnp/isapnp.h
View file

@ -51,6 +51,12 @@ typedef struct _ISAPNP_PDO_EXTENSION {
/* isapnp.c */ /* isapnp.c */
NTSTATUS
NTAPI
IsaPnpFillDeviceRelations(
IN PISAPNP_FDO_EXTENSION FdoExt,
IN PIRP Irp);
DRIVER_INITIALIZE DriverEntry; DRIVER_INITIALIZE DriverEntry;
NTSTATUS NTSTATUS