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69 lines
1.2 KiB
C++
69 lines
1.2 KiB
C++
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/*++
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Copyright (c) Microsoft Corporation
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Module Name:
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FxRequestBaseKm.hpp
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Abstract:
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This module implements km specific functions for FxRequestBase.
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Author:
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Environment:
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Kernel mode only
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Revision History:
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--*/
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#ifndef _FXREQUESTBASEKM_HPP_
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#define _FXREQUESTBASEKM_HPP_
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VOID
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__inline
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FxRequestBase::FreeMdls(
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VOID
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)
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{
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PMDL pMdl, pNext;
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if (IsAllocatedFromIo() || IsCanComplete()) {
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return;
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}
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pMdl = m_Irp.GetIrp()->MdlAddress;
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//
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// Free any PMDLs that the lower layer allocated. Since we are going
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// to free the PIRP ourself and not call IoCompleteRequest, we must mimic
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// the behavior in IoCompleteRequest which does the same thing.
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//
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while (pMdl != NULL) {
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pNext = pMdl->Next;
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if (pMdl->MdlFlags & MDL_PAGES_LOCKED) {
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MmUnlockPages(pMdl);
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}
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else if (GetDriverGlobals()->FxVerifierOn) {
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DbgPrint("pMdl %p, Flags 0x%x in PIRP %p should be locked",
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pMdl, pMdl->MdlFlags, m_Irp.GetIrp());
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FxVerifierDbgBreakPoint(GetDriverGlobals());
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}
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FxIrpMdlFree(pMdl);
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pMdl = pNext;
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}
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m_Irp.GetIrp()->MdlAddress = NULL;
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}
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#endif // _FXREQUESTBASEKM_HPP
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