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Support unhook notification function for Smst->SmmRegisterProtocolNotify() per PI specification.

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Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14823 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Jeff Fan
2013-11-05 13:32:32 +00:00
committed by vanjeff
parent 7baf3c69c5
commit 50903aa5a8
2 changed files with 37 additions and 3 deletions
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36
MdeModulePkg/Core/PiSmmCore/Notify.c
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@@ -1,7 +1,7 @@
/** @file
Support functions for UEFI protocol notification infrastructure.
Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2009 - 2013, 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
@@ -94,6 +94,8 @@ SmmRemoveInterfaceFromProtocol (
@retval EFI_INVALID_PARAMETER Invalid parameter
@retval EFI_SUCCESS Successfully returned the registration record
that has been added
@retval EFI_OUT_OF_RESOURCES Not enough memory resource to finish the request
@retval EFI_NOT_FOUND If the registration is not found when Function == NULL
**/
EFI_STATUS
@@ -109,10 +111,40 @@ SmmRegisterProtocolNotify (
LIST_ENTRY *Link;
EFI_STATUS Status;
if ((Protocol == NULL) || (Function == NULL) || (Registration == NULL)) {
if (Protocol == NULL || Registration == NULL) {
return EFI_INVALID_PARAMETER;
}
if (Function == NULL) {
//
// Get the protocol entry per Protocol
//
ProtEntry = SmmFindProtocolEntry ((EFI_GUID *) Protocol, FALSE);
if (ProtEntry != NULL) {
ProtNotify = (PROTOCOL_NOTIFY * )*Registration;
for (Link = ProtEntry->Notify.ForwardLink;
Link != &ProtEntry->Notify;
Link = Link->ForwardLink) {
//
// Compare the notification record
//
if (ProtNotify == (CR(Link, PROTOCOL_NOTIFY, Link, PROTOCOL_NOTIFY_SIGNATURE))){
//
// If Registration is an existing registration, then unhook it
//
ProtNotify->Signature = 0;
RemoveEntryList (&ProtNotify->Link);
FreePool (ProtNotify);
return EFI_SUCCESS;
}
}
}
//
// If the registration is not found
//
return EFI_NOT_FOUND;
}
ProtNotify = NULL;
//