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Enhance Partition driver for EFI_NO_MEDIA case 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9070 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
qhuang8 2009-08-14 05:41:10 +00:00
parent 339c754a01
commit 9afd0514a6
1 changed files with 18 additions and 6 deletions
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22
MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
View File

@ -4,7 +4,7 @@
of the raw block devices media. Currently "El Torito CD-ROM", Legacy
MBR, and GPT partition schemes are supported.
Copyright (c) 2006 - 2008, Intel Corporation. <BR>
Copyright (c) 2006 - 2009, Intel Corporation. <BR>
All rights reserved. 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
@ -179,6 +179,7 @@ PartitionDriverBindingStart (
EFI_DISK_IO_PROTOCOL *DiskIo;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
PARTITION_DETECT_ROUTINE *Routine;
BOOLEAN MediaPresent;
Status = gBS->OpenProtocol (
ControllerHandle,
@ -227,10 +228,12 @@ PartitionDriverBindingStart (
OpenStatus = Status;
//
// If no media is present, do nothing here.
// Try to read blocks when there's media or it is removable physical partition.
//
Status = EFI_UNSUPPORTED;
if (BlockIo->Media->MediaPresent) {
MediaPresent = BlockIo->Media->MediaPresent;
if (BlockIo->Media->MediaPresent ||
(BlockIo->Media->RemovableMedia && !BlockIo->Media->LogicalPartition)) {
//
// Try for GPT, then El Torito, and then legacy MBR partition types. If the
// media supports a given partition type install child handles to represent
@ -245,7 +248,7 @@ PartitionDriverBindingStart (
BlockIo,
ParentDevicePath
);
if (!EFI_ERROR (Status) || Status == EFI_MEDIA_CHANGED) {
if (!EFI_ERROR (Status) || Status == EFI_MEDIA_CHANGED || Status == EFI_NO_MEDIA) {
break;
}
Routine++;
@ -257,7 +260,16 @@ PartitionDriverBindingStart (
// driver. So don't try to close them. Otherwise, we will break the dependency
// between the controller and the driver set up before.
//
if (EFI_ERROR (Status) && !EFI_ERROR (OpenStatus) && Status != EFI_MEDIA_CHANGED) {
// In the case that when the media changes on a device it will Reinstall the
// BlockIo interaface. This will cause a call to our Stop(), and a subsequent
// reentrant call to our Start() successfully. We should leave the device open
// when this happen. The "media change" case includes either the status is
// EFI_MEDIA_CHANGED or it is a "media" to "no media" change.
//
if (EFI_ERROR (Status) &&
!EFI_ERROR (OpenStatus) &&
Status != EFI_MEDIA_CHANGED &&
!(MediaPresent && Status == EFI_NO_MEDIA)) {
gBS->CloseProtocol (
ControllerHandle,
&gEfiDiskIoProtocolGuid,