Delay in DPC : CRASH

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From: JG on 3 Feb 2010 08:37

---

I try but i get a crash...
This is my DPC routine what s wrong with it???


VOID
ObdhCtuEvtInterruptDpc(
IN WDFINTERRUPT Interrupt,
IN WDFDEVICE Device
)
{
NTSTATUS status;
POBDHCTU_CONTEXT deviceContext;
WDFREQUEST Request;
USHORT interruptState;
struct PciCtuWaitItOutput* bufferOut;
LARGE_INTEGER delay;
KTIMER timer;

int iCnt;


deviceContext = WdfObjectGet_OBDHCTU_CONTEXT(Device);


WdfInterruptAcquireLock(Interrupt);

Request = deviceContext->WaitingRequest; //Request pending waiting the
right interruption....

interruptState = deviceContext->InterruptState;


WdfInterruptReleaseLock( Interrupt );


if (Request)
{

if( ( interruptState & 0x01) && ( (interruptState & 0x10)==0))
{

delay.QuadPart = WDF_REL_TIMEOUT_IN_US(100);

KeInitializeTimerEx(&timer, SynchronizationTimer);
KeSetTimer(&timer, delay, NULL);
while (TRUE)
{
status = KeWaitForSingleObject( &timer,
Executive, KernelMode,
FALSE, NULL);

if (status!=STATUS_TIMEOUT ) //Ok my timer is ended
{
//DbgPrint(("KeWaitForMultipleObjects failed\n"));
break;
}//else i wait again
}
KeCancelTimer(&timer);


}
//i save the interrupt state IT
status = WdfRequestRetrieveOutputBuffer(
Request,
2,
&bufferOut,
NULL
);
if (NT_SUCCESS(status))
bufferOut->ushStateIt = interruptState;
//i complete the request
WdfRequestCompleteWithInformation(Request, STATUS_SUCCESS, 2);
deviceContext->WaitingRequest = NULL;

}
return;
}
"JG" <jerome.gil(a)dactem.com> a �crit dans le message de news:
O%23Ps2eKpKHA.4836(a)TK2MSFTNGP05.phx.gbl...
> Thanks i will try a KTimer
>
> I will let you know...
>
> "JG" <jerome.gil(a)dactem.com> a �crit dans le message de news:
> OO8iNTCpKHA.1556(a)TK2MSFTNGP05.phx.gbl...
>> Hi,
>>
>> I want to wait a delay in a DPC routine. This DPC is running from a queue
>> after an interrupt routine.
>> I try KeWaitEvent but i get a bluescreen...
>> Can someone help me to make a wait(2ms)
>> Thanks
>>
>
>

From: Don Burn on 3 Feb 2010 08:39

---

No you cannot do a KeWaitForSingleObject( &timer, Executive, KernelMode,
FALSE, NULL) at DPC_LEVEL this will crash. Change your call to KeSetTimer
to have another DPC in it that is run when the timer is expired and does the
work.


--
Don Burn (MVP, Windows DKD)
Windows Filesystem and Driver Consulting
Website: http://www.windrvr.com
Blog: http://msmvps.com/blogs/WinDrvr
Remove StopSpam to reply




"JG" <jerome.gil(a)dactem.com> wrote in message
news:u6%237nVNpKHA.5508(a)TK2MSFTNGP02.phx.gbl...
>I try but i get a crash...
> This is my DPC routine what s wrong with it???
>
>
> VOID
> ObdhCtuEvtInterruptDpc(
> IN WDFINTERRUPT Interrupt,
> IN WDFDEVICE Device
> )
> {
> NTSTATUS status;
> POBDHCTU_CONTEXT deviceContext;
> WDFREQUEST Request;
> USHORT interruptState;
> struct PciCtuWaitItOutput* bufferOut;
> LARGE_INTEGER delay;
> KTIMER timer;
>
> int iCnt;
>
>
> deviceContext = WdfObjectGet_OBDHCTU_CONTEXT(Device);
>
>
> WdfInterruptAcquireLock(Interrupt);
>
> Request = deviceContext->WaitingRequest; //Request pending waiting the
> right interruption....
>
> interruptState = deviceContext->InterruptState;
>
>
> WdfInterruptReleaseLock( Interrupt );
>
>
> if (Request)
> {
>
> if( ( interruptState & 0x01) && ( (interruptState & 0x10)==0))
> {
>
> delay.QuadPart = WDF_REL_TIMEOUT_IN_US(100);
>
> KeInitializeTimerEx(&timer, SynchronizationTimer);
> KeSetTimer(&timer, delay, NULL);
> while (TRUE)
> {
> status = KeWaitForSingleObject( &timer,
> Executive, KernelMode,
> FALSE, NULL);
>
> if (status!=STATUS_TIMEOUT ) //Ok my timer is ended
> {
> //DbgPrint(("KeWaitForMultipleObjects failed\n"));
> break;
> }//else i wait again
> }
> KeCancelTimer(&timer);
>
>
> }
> //i save the interrupt state IT
> status = WdfRequestRetrieveOutputBuffer(
> Request,
> 2,
> &bufferOut,
> NULL
> );
> if (NT_SUCCESS(status))
> bufferOut->ushStateIt = interruptState;
> //i complete the request
> WdfRequestCompleteWithInformation(Request, STATUS_SUCCESS, 2);
> deviceContext->WaitingRequest = NULL;
>
> }
> return;
> }
> "JG" <jerome.gil(a)dactem.com> a �crit dans le message de news:
> O%23Ps2eKpKHA.4836(a)TK2MSFTNGP05.phx.gbl...
>> Thanks i will try a KTimer
>>
>> I will let you know...
>>
>> "JG" <jerome.gil(a)dactem.com> a �crit dans le message de news:
>> OO8iNTCpKHA.1556(a)TK2MSFTNGP05.phx.gbl...
>>> Hi,
>>>
>>> I want to wait a delay in a DPC routine. This DPC is running from a
>>> queue after an interrupt routine.
>>> I try KeWaitEvent but i get a bluescreen...
>>> Can someone help me to make a wait(2ms)
>>> Thanks
>>>
>>
>>
>
>
>
> __________ Information from ESET NOD32 Antivirus, version of virus
> signature database 4831 (20100203) __________
>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com
>
>
>



__________ Information from ESET NOD32 Antivirus, version of virus signature database 4831 (20100203) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

From: eagersh on 3 Feb 2010 11:40

---

On Feb 3, 6:37 am, "JG" <jerome....(a)dactem.com> wrote:
> I try but i get a crash...
> This is my DPC routine what s wrong with it???
>
> VOID
> ObdhCtuEvtInterruptDpc(
>     IN WDFINTERRUPT Interrupt,
>     IN WDFDEVICE    Device
>     )
> {
>     NTSTATUS     status;
>     POBDHCTU_CONTEXT   deviceContext;
>     WDFREQUEST     Request;
>  USHORT      interruptState;
>  struct PciCtuWaitItOutput* bufferOut;
>  LARGE_INTEGER  delay;
>  KTIMER timer;
>
>  int iCnt;
>
>     deviceContext  = WdfObjectGet_OBDHCTU_CONTEXT(Device);
>
>  WdfInterruptAcquireLock(Interrupt);
>
>  Request = deviceContext->WaitingRequest; //Request pending waiting the
> right interruption....
>
>  interruptState = deviceContext->InterruptState;
>
>     WdfInterruptReleaseLock( Interrupt );
>
>     if (Request)
>   {
>
>   if( ( interruptState & 0x01) && ( (interruptState & 0x10)==0))
>   {
>
>    delay.QuadPart =  WDF_REL_TIMEOUT_IN_US(100);
>
>    KeInitializeTimerEx(&timer, SynchronizationTimer);
>    KeSetTimer(&timer, delay, NULL);
>    while (TRUE)
>    {
>     status = KeWaitForSingleObject( &timer,
>     Executive, KernelMode,
>     FALSE, NULL);
>
>     if (status!=STATUS_TIMEOUT ) //Ok my timer is ended
>     {
>      //DbgPrint(("KeWaitForMultipleObjects failed\n"));
>      break;
>     }//else i wait again
>    }
>    KeCancelTimer(&timer);
>
>   }
>  //i save the interrupt state IT
>   status = WdfRequestRetrieveOutputBuffer(
>       Request,
>       2,
>       &bufferOut,
>       NULL
>      );
>   if (NT_SUCCESS(status))
>     bufferOut->ushStateIt = interruptState;
>  //i complete the request
>   WdfRequestCompleteWithInformation(Request, STATUS_SUCCESS, 2);
>   deviceContext->WaitingRequest = NULL;
>
>  }
>     return;}
>
> "JG" <jerome....(a)dactem.com> a écrit dans le message de news:
> O%23Ps2eKpKHA.4...(a)TK2MSFTNGP05.phx.gbl...
>

Look at documentation for using KeWaitForSingleObject in Dispatch
Level.
http://msdn.microsoft.com/en-us/library/ms801959.aspx
You could find restrictions of using KeWaitForSingleObject in the end
of "Comments" of the web page.

Igor Sharovar

From: JG on 4 Feb 2010 10:57

---

Ok it seems to work...
Thanks a lot!!!


"Don Burn" <burn(a)stopspam.windrvr.com> a �crit dans le message de news:
evW0fZNpKHA.4836(a)TK2MSFTNGP02.phx.gbl...
> No you cannot do a KeWaitForSingleObject( &timer, Executive, KernelMode,
> FALSE, NULL) at DPC_LEVEL this will crash. Change your call to KeSetTimer
> to have another DPC in it that is run when the timer is expired and does
> the work.
>
>
> --
> Don Burn (MVP, Windows DKD)
> Windows Filesystem and Driver Consulting
> Website: http://www.windrvr.com
> Blog: http://msmvps.com/blogs/WinDrvr
> Remove StopSpam to reply
>
>
>
>
> "JG" <jerome.gil(a)dactem.com> wrote in message
> news:u6%237nVNpKHA.5508(a)TK2MSFTNGP02.phx.gbl...
>>I try but i get a crash...
>> This is my DPC routine what s wrong with it???
>>
>>
>> VOID
>> ObdhCtuEvtInterruptDpc(
>> IN WDFINTERRUPT Interrupt,
>> IN WDFDEVICE Device
>> )
>> {
>> NTSTATUS status;
>> POBDHCTU_CONTEXT deviceContext;
>> WDFREQUEST Request;
>> USHORT interruptState;
>> struct PciCtuWaitItOutput* bufferOut;
>> LARGE_INTEGER delay;
>> KTIMER timer;
>>
>> int iCnt;
>>
>>
>> deviceContext = WdfObjectGet_OBDHCTU_CONTEXT(Device);
>>
>>
>> WdfInterruptAcquireLock(Interrupt);
>>
>> Request = deviceContext->WaitingRequest; //Request pending waiting the
>> right interruption....
>>
>> interruptState = deviceContext->InterruptState;
>>
>>
>> WdfInterruptReleaseLock( Interrupt );
>>
>>
>> if (Request)
>> {
>>
>> if( ( interruptState & 0x01) && ( (interruptState & 0x10)==0))
>> {
>>
>> delay.QuadPart = WDF_REL_TIMEOUT_IN_US(100);
>>
>> KeInitializeTimerEx(&timer, SynchronizationTimer);
>> KeSetTimer(&timer, delay, NULL);
>> while (TRUE)
>> {
>> status = KeWaitForSingleObject( &timer,
>> Executive, KernelMode,
>> FALSE, NULL);
>>
>> if (status!=STATUS_TIMEOUT ) //Ok my timer is ended
>> {
>> //DbgPrint(("KeWaitForMultipleObjects failed\n"));
>> break;
>> }//else i wait again
>> }
>> KeCancelTimer(&timer);
>>
>>
>> }
>> //i save the interrupt state IT
>> status = WdfRequestRetrieveOutputBuffer(
>> Request,
>> 2,
>> &bufferOut,
>> NULL
>> );
>> if (NT_SUCCESS(status))
>> bufferOut->ushStateIt = interruptState;
>> //i complete the request
>> WdfRequestCompleteWithInformation(Request, STATUS_SUCCESS, 2);
>> deviceContext->WaitingRequest = NULL;
>>
>> }
>> return;
>> }
>> "JG" <jerome.gil(a)dactem.com> a �crit dans le message de news:
>> O%23Ps2eKpKHA.4836(a)TK2MSFTNGP05.phx.gbl...
>>> Thanks i will try a KTimer
>>>
>>> I will let you know...
>>>
>>> "JG" <jerome.gil(a)dactem.com> a �crit dans le message de news:
>>> OO8iNTCpKHA.1556(a)TK2MSFTNGP05.phx.gbl...
>>>> Hi,
>>>>
>>>> I want to wait a delay in a DPC routine. This DPC is running from a
>>>> queue after an interrupt routine.
>>>> I try KeWaitEvent but i get a bluescreen...
>>>> Can someone help me to make a wait(2ms)
>>>> Thanks
>>>>
>>>
>>>
>>
>>
>>
>> __________ Information from ESET NOD32 Antivirus, version of virus
>> signature database 4831 (20100203) __________
>>
>> The message was checked by ESET NOD32 Antivirus.
>>
>> http://www.eset.com
>>
>>
>>
>
>
>
> __________ Information from ESET NOD32 Antivirus, version of virus
> signature database 4831 (20100203) __________
>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com
>
>
>
>

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