IoFreeIrp

The IoFreeIrp routine releases a caller-allocated IRP from the caller’s IoCompletion routine.

VOID 
  IoFreeIrp(
    IN PIRP  Irp
    );

Parameters

Irp

Pointer to the IRP that is to be released.

Return Value

None

Headers

Declared in wdm.h and ntddk.h. Include wdm.h or ntddk.h.

Comments

This routine is the reciprocal to IoAllocateIrp or IoBuildAsynchronousFsdRequest. The released IRP must have been allocated by the caller.

This routine also releases an IRP allocated with IoMakeAssociatedIrp in which the caller set up its IoCompletion routine that returns STATUS_MORE_PROCESSING_REQUIRED for the associated IRP.

Callers of IoFreeIrp must be running at IRQL <= DISPATCH_LEVEL.

See Also

IoAllocateIrp, IoBuildAsynchronousFsdRequest, IoMakeAssociatedIrp, IoSetCompletionRoutine