IoFreeMdl

The IoFreeMdl routine releases a caller-allocated MDL.

VOID 
  IoFreeMdl(
    IN PMDL  Mdl
    );

Parameters

Mdl

Pointer to the MDL to be released.

Return Value

None

Headers

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

Comments

If a driver allocates an MDL to describe a buffer, it must explicitly release the MDL when operations on the buffer are done.

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

See Also

IoAllocateMdl, IoBuildPartialMdl