Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-12-27 01:24:38 +00:00
Code Issues Projects Releases Packages Wiki Activity

Fixed access to non-existent device extension.

Browse source 
svn path=/trunk/; revision=3250
This commit is contained in:
Eric Kohl 2002-07-18 00:29:19 +00:00
parent 2e467c56a3
commit fc1193592b
1 changed files with 16 additions and 15 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

31
reactos/drivers/dd/beep/beep.c
View file

@ -1,4 +1,4 @@
/* $Id: beep.c,v 1.10 2001/08/27 01:25:17 ekohl Exp $
/* $Id: beep.c,v 1.11 2002/07/18 00:29:19 ekohl Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -32,7 +32,6 @@ typedef struct _BEEP_DEVICE_EXTENSION
/* FUNCTIONS ***************************************************************/
static VOID STDCALL
BeepDPC(PKDPC Dpc,
PVOID DeferredContext,
@ -245,26 +244,15 @@ DriverEntry(PDRIVER_OBJECT DriverObject,
UNICODE_STRING SymlinkName;
NTSTATUS Status;
DbgPrint("Beep Device Driver 0.0.3\n");
DPRINT("Beep Device Driver 0.0.3\n");
DriverObject->Flags = 0;
DriverObject->MajorFunction[IRP_MJ_CREATE] = BeepCreate;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = BeepClose;
DriverObject->MajorFunction[IRP_MJ_CLEANUP] = BeepCleanup;
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = BeepDeviceControl;
DriverObject->DriverUnload = BeepUnload;
/* set up device extension */
DeviceExtension = DeviceObject->DeviceExtension;
DeviceExtension->BeepOn = FALSE;
KeInitializeDpc(&DeviceExtension->Dpc,
BeepDPC,
DeviceExtension);
KeInitializeTimer(&DeviceExtension->Timer);
KeInitializeEvent(&DeviceExtension->Event,
SynchronizationEvent,
FALSE);
RtlInitUnicodeString(&DeviceName,
L"\\Device\\Beep");
Status = IoCreateDevice(DriverObject,
@ -277,6 +265,19 @@ DriverEntry(PDRIVER_OBJECT DriverObject,
if (!NT_SUCCESS(Status))
return Status;
/* set up device extension */
DeviceExtension = DeviceObject->DeviceExtension;
DeviceExtension->BeepOn = FALSE;
KeInitializeDpc(&DeviceExtension->Dpc,
BeepDPC,
DeviceExtension);
KeInitializeTimer(&DeviceExtension->Timer);
KeInitializeEvent(&DeviceExtension->Event,
SynchronizationEvent,
FALSE);
/* Create the dos device link */
RtlInitUnicodeString(&SymlinkName,
L"\\??\\Beep");
IoCreateSymbolicLink(&SymlinkName,