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MdeModulePkg PartitionDxe: Some ISO images cannot be recognized properly

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Some ISO images cannot be recognized properly when they are on media whose
block size is not 2048 bytes.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
This commit is contained in:
Hao Wu 2016-03-11 15:55:36 +08:00
parent ef95212963
commit 744c71687b
1 changed files with 7 additions and 7 deletions
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14
MdeModulePkg/Universal/Disk/PartitionDxe/ElTorito.c
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@ -1,7 +1,7 @@
/** @file
Decode an El Torito formatted CD-ROM
Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<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
@ -183,7 +183,7 @@ PartitionInstallElToritoChildHandles (
}
SubBlockSize = 512;
SectorCount = Catalog->Boot.SectorCount * (SIZE_2KB / Media->BlockSize);
SectorCount = Catalog->Boot.SectorCount;
switch (Catalog->Boot.MediaType) {
@ -233,15 +233,15 @@ PartitionInstallElToritoChildHandles (
//
// When the SectorCount < 2, set the Partition as the whole CD.
//
if (VolSpaceSize > (Media->LastBlock + 1)) {
CdDev.PartitionSize = (UINT32)(Media->LastBlock - Catalog->Boot.Lba + 1);
if (VolSpaceSize * (SIZE_2KB / Media->BlockSize) > (Media->LastBlock + 1)) {
CdDev.PartitionSize = (UINT32)(Media->LastBlock - Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize) + 1);
} else {
CdDev.PartitionSize = (UINT32)(VolSpaceSize - Catalog->Boot.Lba);
CdDev.PartitionSize = (UINT32)(VolSpaceSize - Catalog->Boot.Lba) * (SIZE_2KB / Media->BlockSize);
}
} else {
CdDev.PartitionSize = DivU64x32 (
MultU64x32 (
SectorCount,
SectorCount * (SIZE_2KB / Media->BlockSize),
SubBlockSize
) + Media->BlockSize - 1,
Media->BlockSize
@ -258,7 +258,7 @@ PartitionInstallElToritoChildHandles (
DevicePath,
(EFI_DEVICE_PATH_PROTOCOL *) &CdDev,
Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize),
MultU64x32 (Catalog->Boot.Lba + CdDev.PartitionSize - 1, SIZE_2KB / Media->BlockSize),
Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize) + CdDev.PartitionSize - 1,
SubBlockSize,
FALSE
);