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Unmap the pages first and than remove the entries from the allocation map in MmUnmapLockedPages.

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svn path=/trunk/; revision=3042
This commit is contained in:
Hartmut Birr 2002-06-10 21:36:31 +00:00
parent 16068960f0
commit 0dbc90e4e0
1 changed files with 11 additions and 11 deletions
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22
reactos/ntoskrnl/mm/mdl.c
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@ -1,4 +1,4 @@
/* $Id: mdl.c,v 1.41 2002/06/04 15:26:56 dwelch Exp $ /* $Id: mdl.c,v 1.42 2002/06/10 21:36:31 hbirr Exp $
* *
* COPYRIGHT: See COPYING in the top level directory * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
@ -209,6 +209,16 @@ MmUnmapLockedPages(PVOID BaseAddress, PMDL Mdl)
/* Calculate the number of pages we mapped. */ /* Calculate the number of pages we mapped. */
RegionSize = PAGE_ROUND_UP(Mdl->ByteCount + Mdl->ByteOffset) / PAGESIZE; RegionSize = PAGE_ROUND_UP(Mdl->ByteCount + Mdl->ByteOffset) / PAGESIZE;
/* Unmap all the pages. */
for (i = 0; i < RegionSize; i++)
{
MmDeleteVirtualMapping(NULL,
BaseAddress + (i * PAGESIZE),
FALSE,
NULL,
NULL);
}
KeAcquireSpinLock(&MiMdlMappingRegionLock, &oldIrql); KeAcquireSpinLock(&MiMdlMappingRegionLock, &oldIrql);
/* Deallocate all the pages used. */ /* Deallocate all the pages used. */
Base = (ULONG)(BaseAddress - MiMdlMappingRegionBase - Mdl->ByteOffset); Base = (ULONG)(BaseAddress - MiMdlMappingRegionBase - Mdl->ByteOffset);
@ -225,16 +235,6 @@ MmUnmapLockedPages(PVOID BaseAddress, PMDL Mdl)
} }
KeReleaseSpinLock(&MiMdlMappingRegionLock, oldIrql); KeReleaseSpinLock(&MiMdlMappingRegionLock, oldIrql);
/* Unmap all the pages. */
for (i = 0; i < RegionSize; i++)
{
MmDeleteVirtualMapping(NULL,
BaseAddress + (i * PAGESIZE),
FALSE,
NULL,
NULL);
}
/* Reset the MDL state. */ /* Reset the MDL state. */
Mdl->MdlFlags = Mdl->MdlFlags & ~MDL_MAPPED_TO_SYSTEM_VA; Mdl->MdlFlags = Mdl->MdlFlags & ~MDL_MAPPED_TO_SYSTEM_VA;
Mdl->MappedSystemVa = NULL; Mdl->MappedSystemVa = NULL;