Revision: 14823
http://sourceforge.net/p/edk2/code/14823
Author: vanjeff
Date: 2013-11-05 13:32:32 +0000 (Tue, 05 Nov 2013)
Log Message:
-----------
Support unhook notification function for Smst->SmmRegisterProtocolNotify() per
PI specification.
Signed-off-by: Jeff Fan <[email protected]>
Reviewed-by: Jiewen Yao <[email protected]>
Modified Paths:
--------------
trunk/edk2/MdeModulePkg/Core/PiSmmCore/Notify.c
trunk/edk2/MdePkg/Include/Pi/PiSmmCis.h
Modified: trunk/edk2/MdeModulePkg/Core/PiSmmCore/Notify.c
===================================================================
--- trunk/edk2/MdeModulePkg/Core/PiSmmCore/Notify.c 2013-11-04 03:13:54 UTC
(rev 14822)
+++ trunk/edk2/MdeModulePkg/Core/PiSmmCore/Notify.c 2013-11-05 13:32:32 UTC
(rev 14823)
@@ -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 @@
@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 @@
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;
//
Modified: trunk/edk2/MdePkg/Include/Pi/PiSmmCis.h
===================================================================
--- trunk/edk2/MdePkg/Include/Pi/PiSmmCis.h 2013-11-04 03:13:54 UTC (rev
14822)
+++ trunk/edk2/MdePkg/Include/Pi/PiSmmCis.h 2013-11-05 13:32:32 UTC (rev
14823)
@@ -2,7 +2,7 @@
Common definitions in the Platform Initialization Specification version 1.2
VOLUME 4 System Management Mode Core Interface version.
- Copyright (c) 2009 - 2012, 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
@@ -106,6 +106,7 @@
The SmmRegisterProtocolNotify() function creates a registration Function
that is to be
called whenever a protocol interface is installed for Protocol by
SmmInstallProtocolInterface().
+ If Function == NULL and Registration is an existing registration, then the
callback is unhooked.
@param[in] Protocol The unique ID of the protocol for which the
event is to be registered.
@param[in] Function Points to the notification function.
@@ -114,6 +115,7 @@
@retval EFI_SUCCESS Successfully returned the registration record
that has been added.
@retval EFI_INVALID_PARAMETER One or more of Protocol, Function and
Registration is NULL.
@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.
**/
typedef
EFI_STATUS
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