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Add Pointer check for NULL before referring it and remove unnecessary pointer check in AtaAtapiPassThru and Partition Drivers. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11627 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
qianouyang 2011-05-06 07:15:41 +00:00
parent 58f8069039
commit d0844d133b
2 changed files with 30 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.c
View File

@ -794,7 +794,7 @@ ErrorExit:
);
}
if (Instance->TimerEvent != NULL) {
if ((Instance != NULL) && (Instance->TimerEvent != NULL)) {
gBS->CloseEvent (Instance->TimerEvent);
}

73
MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
View File

@ -457,13 +457,8 @@ PartitionDriverBindingStop (
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (BlockIo != NULL) {
Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (BlockIo);
} else if (BlockIo2 != NULL) {
Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (BlockIo2);
} else {
ASSERT (FALSE);
}
Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (BlockIo);
Status = gBS->CloseProtocol (
ControllerHandle,
@ -1008,19 +1003,22 @@ PartitionInstallChildHandle (
Private->ParentBlockIo2 = ParentBlockIo2;
Private->DiskIo = ParentDiskIo;
if (Private->ParentBlockIo != NULL) {
Private->BlockIo.Revision = ParentBlockIo->Revision;
//
// Set the BlockIO into Private Data.
//
Private->BlockIo.Revision = ParentBlockIo->Revision;
Private->BlockIo.Media = &Private->Media;
CopyMem (Private->BlockIo.Media, ParentBlockIo->Media, sizeof (EFI_BLOCK_IO_MEDIA));
Private->BlockIo.Media = &Private->Media;
CopyMem (Private->BlockIo.Media, ParentBlockIo->Media, sizeof (EFI_BLOCK_IO_MEDIA));
Private->BlockIo.Reset = PartitionReset;
Private->BlockIo.ReadBlocks = PartitionReadBlocks;
Private->BlockIo.WriteBlocks = PartitionWriteBlocks;
Private->BlockIo.FlushBlocks = PartitionFlushBlocks;
Private->BlockIo.Reset = PartitionReset;
Private->BlockIo.ReadBlocks = PartitionReadBlocks;
Private->BlockIo.WriteBlocks = PartitionWriteBlocks;
Private->BlockIo.FlushBlocks = PartitionFlushBlocks;
}
//
// Set the BlockIO2 into Private Data.
//
if (Private->ParentBlockIo2 != NULL) {
Private->BlockIo2.Media = &Private->Media2;
CopyMem (Private->BlockIo2.Media, ParentBlockIo2->Media, sizeof (EFI_BLOCK_IO_MEDIA));
@ -1036,7 +1034,7 @@ PartitionInstallChildHandle (
Private->Media.LastBlock = DivU64x32 (
MultU64x32 (
End - Start + 1,
(ParentBlockIo != NULL) ? ParentBlockIo->Media->BlockSize : ParentBlockIo2->Media->BlockSize
ParentBlockIo->Media->BlockSize
),
BlockSize
) - 1;
@ -1085,8 +1083,7 @@ PartitionInstallChildHandle (
// here.
//
Private->Handle = NULL;
if ((Private->ParentBlockIo != NULL) &&
(Private->ParentBlockIo2 != NULL) &&
if ((Private->ParentBlockIo2 != NULL) &&
(Private->ParentBlockIo2->Media->BlockSize == BlockSize)
) {
Status = gBS->InstallMultipleProtocolInterfaces (
@ -1102,32 +1099,16 @@ PartitionInstallChildHandle (
NULL
);
} else {
if (Private->ParentBlockIo != NULL) {
Status = gBS->InstallMultipleProtocolInterfaces (
&Private->Handle,
&gEfiDevicePathProtocolGuid,
Private->DevicePath,
&gEfiBlockIoProtocolGuid,
&Private->BlockIo,
Private->EspGuid,
NULL,
NULL
);
}
if (Private->ParentBlockIo2 != NULL &&
Private->ParentBlockIo2->Media->BlockSize == BlockSize
) {
Status = gBS->InstallMultipleProtocolInterfaces (
&Private->Handle,
&gEfiDevicePathProtocolGuid,
Private->DevicePath,
&gEfiBlockIo2ProtocolGuid,
&Private->BlockIo2,
Private->EspGuid,
NULL,
NULL
);
}
Status = gBS->InstallMultipleProtocolInterfaces (
&Private->Handle,
&gEfiDevicePathProtocolGuid,
Private->DevicePath,
&gEfiBlockIoProtocolGuid,
&Private->BlockIo,
Private->EspGuid,
NULL,
NULL
);
}
if (!EFI_ERROR (Status)) {