StorPortFreeMdl function (storport.h)

The StorPortFreeMdl routine frees a memory descriptor list (MDL) describing non-paged pool memory.

Syntax

ULONG StorPortFreeMdl(
  [in] PVOID HwDeviceExtension,
  [in] PVOID Mdl
);

[in] HwDeviceExtension

A pointer to the hardware device extension for the host bus adapter (HBA).

[in] Mdl

A pointer to the MDL to be freed.

StorPortFreeMdl returns one of the following status codes:

Return code	Description
STOR_STATUS_NOT_IMPLEMENTED	This function is not implemented on the active operating system.
STOR_STATUS_SUCCESS	Indicates that the MDL was freed successfully.
STOR_STATUS_INVALID_PARAMETER	The pointer to the MDL is NULL.
STOR_STATUS_INVALID_IRQL	The call was made at an invalid IRQL.

A miniport driver calls the StorPortFreeMdl routine to free the MDL that was allocated in a previous call to StorPortAllocateMdl.

Requirement	Value
Target Platform	Universal
Header	storport.h (include Storport.h)
IRQL	<=DISPATCH_LEVEL
DDI compliance rules	StorPortIrql(storport)