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MdeModulePkg RamDiskDxe: Fix incorrect RAM disk memory address calculation 

EndingAddress is calculated incorrectly. Original code calculates it as
(StartingAddress + Size). Correct value should be (StartingAddress +
Size - 1.

Note:
Besides the changes made by Samer, Hao also fixed a similar issue in
RamDiskImpl.c

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Samer El-Haj-Mahmoud <elhaj@hpe.com>
Signed-off-by: Tapan Shah <tapandshah@hpe.com>
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Tapan Shah <tapandshah@hpe.com>
This commit is contained in:
Samer El-Haj-Mahmoud 2016-03-30 07:12:51 +08:00 committed by Hao Wu
parent 307a55fa01
commit 5eae4ff002
2 changed files with 4 additions and 3 deletions
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2
MdeModulePkg/Universal/Disk/RamDiskDxe/RamDiskImpl.c
View File

@ -566,7 +566,7 @@ UpdateMainForm (
L" RAM Disk %d: [0x%lx, 0x%lx]\n",
Index,
PrivateData->StartingAddr,
PrivateData->StartingAddr + PrivateData->Size
PrivateData->StartingAddr + PrivateData->Size - 1
);
StringId = HiiSetString (ConfigPrivate->HiiHandle, 0, RamDiskStr, NULL);

5
MdeModulePkg/Universal/Disk/RamDiskDxe/RamDiskProtocol.c
View File

@ -2,6 +2,7 @@
The realization of EFI_RAM_DISK_PROTOCOL.
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@ -50,7 +51,7 @@ RamDiskInitDeviceNode (
);
WriteUnaligned64 (
(UINT64 *) &(RamDiskDevNode->EndingAddr[0]),
(UINT64) PrivateData->StartingAddr + PrivateData->Size
(UINT64) PrivateData->StartingAddr + PrivateData->Size - 1
);
CopyGuid (&RamDiskDevNode->TypeGuid, &PrivateData->TypeGuid);
RamDiskDevNode->Instance = PrivateData->InstanceNumber;
@ -305,7 +306,7 @@ RamDiskUnregister (
// and type guid.
//
if ((StartingAddr == PrivateData->StartingAddr) &&
(EndingAddr == PrivateData->StartingAddr + PrivateData->Size) &&
(EndingAddr == PrivateData->StartingAddr + PrivateData->Size - 1) &&
(CompareGuid (&RamDiskDevNode->TypeGuid, &PrivateData->TypeGuid))) {
//
// Uninstall the EFI_DEVICE_PATH_PROTOCOL & EFI_BLOCK_IO(2)_PROTOCOL