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IoFreeController routine

The IoFreeController routine releases a previously allocated controller object when the driver has completed an I/O request.

Syntax


VOID IoFreeController(
  _In_  PCONTROLLER_OBJECT ControllerObject
);

Parameters

ControllerObject [in]

Pointer to the driver's controller object, which was allocated for the current I/O operation on a particular device by calling IoAllocateController.

Return value

None

Remarks

The connection between the current target device object and the controller object is released only if no requests are currently queued to the same device. Otherwise, the driver's ControllerControl routine is called with the next IRP bound through the device controller to the target device.

Requirements

Version

Available starting with Windows 2000.

Header

Ntddk.h (include Ntddk.h)

Library

Ntoskrnl.lib

IRQL

DISPATCH_LEVEL

DDI compliance rules

IrqlDispatch, HwStorPortProhibitedDDIs, IrqlDispatch(storport)

See also

IoAllocateController
IoCreateController
IoDeleteController

 

 

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