Iocalldriver never returns

I am having a stringe problem for my Windows 2000 Usb driver. When i am
reading data from the usb device, sometimes the Iocalldriver never sets
the event i am waiting for. Notice that this only happens sometimes,
and only on one specific computer. Windows XP on that computer does not
have this issue.

The code is:


--START CODE--

UsbBuildInterruptOrBulkTransferRequest(
&current->dUrb,
sizeof(_URB_BULK_OR_INTERRUPT_TRANSFER),
pdx->myPipe,
&buffer->data,
NULL,
pdx->bufferChunkSize,
USBD_TRANSFER_DIRECTION_IN | USBD_SHORT_TRANSFER_OK,
NULL
);

KeInitializeEvent(&current->dEvent, NotificationEvent, FALSE);

current->dIrp = IoBuildDeviceIoControlRequest(
IOCTL_INTERNAL_USB_SUBMIT_URB,
pdx->LowerDeviceObject,
NULL,
0,
InputBufferLength
NULL,
OutputBuffer
0,
OutputBufferLength
TRUE,
InternalDeviceIoControl
&current->dEvent,
&current->dIostatus
);

if (!current->dIrp)
{
KdPrint((DRIVERNAME " - IN Pollingthread: Unable to allocate IRP for
sending URB\n"));
goto endThread;
}


stack = IoGetNextIrpStackLocation(current->dIrp);
stack->Parameters.Others.Argument1 = (PVOID) (PURB) &current->dUrb;
status = IoCallDriver(pdx->LowerDeviceObject, current->dIrp);
if (!NT_SUCCESS(status))
{
KdPrint((DRIVERNAME " - IN Pollingthread: IoCallDriver 1 failed with
error code: %8.8X\n",status));
InterlockedExchange(&pdx->error, status);
KeSetEvent(&pdx->errorEvent, 0, FALSE);
goto endThread;
}

if(status != STATUS_PENDING)
{
KdPrint((DRIVERNAME " - IN Pollingthread: IoCallDriver did not return
STATUS_PENDING, instead it returned: %8.8X\n",status));
goto endThread;
}


status = KeWaitForMultipleObjects(
2,
current->dCompleteEvents,
WaitAny,
Executive,
KernelMode,
WaitMode
FALSE,
NULL,
NULL
);


--END CODE--

So, sometimes the KeWaitForMultipleObjects does not get released until
i manually unplugg the device and the error event is set. Can anyone
see anything in the code that might cause this to work sometimes and
sometimes not?


Regards
Wilhelm

Nyamagoud
Fri Oct 13 06:50:01 CDT 2006

Hi wilhelm,
Assuming 'current->dCompleteEvents' has correct events in array, one
very obvious cause can be device may not be sending data on the read pipe.
Pipe might have been stalled.
why dont you just wait on current->dEvent?
You need to complete the irp also.

"wilhelm.lundgren@gmail.com" wrote:

> I am having a stringe problem for my Windows 2000 Usb driver. When i am
> reading data from the usb device, sometimes the Iocalldriver never sets
> the event i am waiting for. Notice that this only happens sometimes,
> and only on one specific computer. Windows XP on that computer does not
> have this issue.
>
> The code is:
>
>
> --START CODE--
>
> UsbBuildInterruptOrBulkTransferRequest(
> ¤t->dUrb,
> sizeof(_URB_BULK_OR_INTERRUPT_TRANSFER),
> pdx->myPipe,
> &buffer->data,
> NULL,
> pdx->bufferChunkSize,
> USBD_TRANSFER_DIRECTION_IN | USBD_SHORT_TRANSFER_OK,
> NULL
> );
>
> KeInitializeEvent(¤t->dEvent, NotificationEvent, FALSE);
>
> current->dIrp = IoBuildDeviceIoControlRequest(
> IOCTL_INTERNAL_USB_SUBMIT_URB,
> pdx->LowerDeviceObject,
> NULL,
> 0,
> InputBufferLength
> NULL,
> OutputBuffer
> 0,
> OutputBufferLength
> TRUE,
> InternalDeviceIoControl
> ¤t->dEvent,
> ¤t->dIostatus
> );
>
> if (!current->dIrp)
> {
> KdPrint((DRIVERNAME " - IN Pollingthread: Unable to allocate IRP for
> sending URB\n"));
> goto endThread;
> }
>
>
> stack = IoGetNextIrpStackLocation(current->dIrp);
> stack->Parameters.Others.Argument1 = (PVOID) (PURB) ¤t->dUrb;
> status = IoCallDriver(pdx->LowerDeviceObject, current->dIrp);
> if (!NT_SUCCESS(status))
> {
> KdPrint((DRIVERNAME " - IN Pollingthread: IoCallDriver 1 failed with
> error code: %8.8X\n",status));
> InterlockedExchange(&pdx->error, status);
> KeSetEvent(&pdx->errorEvent, 0, FALSE);
> goto endThread;
> }
>
> if(status != STATUS_PENDING)
> {
> KdPrint((DRIVERNAME " - IN Pollingthread: IoCallDriver did not return
> STATUS_PENDING, instead it returned: %8.8X\n",status));
> goto endThread;
> }
>
>
> status = KeWaitForMultipleObjects(
> 2,
> current->dCompleteEvents,
> WaitAny,
> Executive,
> KernelMode,
> WaitMode
> FALSE,
> NULL,
> NULL
> );
>
>
> --END CODE--
>
> So, sometimes the KeWaitForMultipleObjects does not get released until
> i manually unplugg the device and the error event is set. Can anyone
> see anything in the code that might cause this to work sometimes and
> sometimes not?
>
>
> Regards
> Wilhelm
>
>