diff options
| -rw-r--r-- | MdeModulePkg/Universal/Disk/PartitionDxe/Mbr.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/MdeModulePkg/Universal/Disk/PartitionDxe/Mbr.c b/MdeModulePkg/Universal/Disk/PartitionDxe/Mbr.c index dac451a..f0c92aa 100644 --- a/MdeModulePkg/Universal/Disk/PartitionDxe/Mbr.c +++ b/MdeModulePkg/Universal/Disk/PartitionDxe/Mbr.c @@ -135,14 +135,17 @@ PartitionInstallMbrChildHandles ( EFI_DEVICE_PATH_PROTOCOL *LastDevicePathNode;
UINT32 BlockSize;
UINT32 MediaId;
- EFI_LBA LastBlock;
+ EFI_LBA LastSector;
EFI_PARTITION_INFO_PROTOCOL PartitionInfo;
Found = EFI_NOT_FOUND;
- BlockSize = BlockIo->Media->BlockSize;
- MediaId = BlockIo->Media->MediaId;
- LastBlock = BlockIo->Media->LastBlock;
+ BlockSize = BlockIo->Media->BlockSize;
+ MediaId = BlockIo->Media->MediaId;
+ LastSector = DivU64x32 (
+ MultU64x32 (BlockIo->Media->LastBlock + 1, BlockSize),
+ MBR_SIZE
+ ) - 1;
//
// Ensure the block size can hold the MBR
@@ -167,7 +170,7 @@ PartitionInstallMbrChildHandles ( Found = Status;
goto Done;
}
- if (!PartitionValidMbr (Mbr, LastBlock)) {
+ if (!PartitionValidMbr (Mbr, LastSector)) {
goto Done;
}
//
|