KsDispatchFastIoDeviceControlFailure - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ks.h

KSDDKAPI BOOLEAN KsDispatchFastIoDeviceControlFailure(
  [in]            PFILE_OBJECT     FileObject,
  [in]            BOOLEAN          Wait,
  [in, optional]  PVOID            InputBuffer,
  [in]            ULONG            InputBufferLength,
  [out, optional] PVOID            OutputBuffer,
  [in]            ULONG            OutputBufferLength,
  [in]            ULONG            IoControlCode,
  [out]           PIO_STATUS_BLOCK IoStatus,
  [in]            PDEVICE_OBJECT   DeviceObject
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-ks-ksdispatchfastiodevicecontrolfailure)

KsDispatchFastIoDeviceControlFailure function

Description

The KsDispatchFastIoDeviceControlFailure function is used in a KSDISPATCH_TABLE.FastDeviceIoControl entry that are not handled. The function should always return FALSE.

Parameters

FileObject [in]

Not used.

Wait [in]

Not used.

InputBuffer [in, optional]

Not used.

InputBufferLength [in]

Not used.

OutputBuffer [out, optional]

Not used.

OutputBufferLength [in]

Not used.

IoControlCode [in]

Not used.

IoStatus [out]

Not used.

DeviceObject [in]

Not used.

Return value

The KsDispatchFastIoDeviceControlFailure function returns FALSE.

Remarks

The KsDispatchFastIoDeviceControlFailure function is needed since the dispatch table for a particular opened instance of a device may not handle a specific major function that another opened instance needs to handle. Therefore, the function pointer in the driver object must always point to a function, such as the KsDispatchFastIoDeviceControlFailure function, that calls a dispatch table entry.

View the official Windows Driver Kit DDI reference

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