From: "Zhiguang Liu" <zhiguang.liu@intel.com>
To: devel@edk2.groups.io
Cc: Zhiguang Liu <zhiguang.liu@intel.com>,
Liming Gao <gaoliming@byosoft.com.cn>,
Jiaxin Wu <jiaxin.wu@intel.com>, Ray Ni <ray.ni@intel.com>,
Laszlo Ersek <lersek@redhat.com>,
Ard Biesheuvel <ardb+tianocore@kernel.org>,
Sami Mujawar <sami.mujawar@arm.com>
Subject: [edk2-devel] [PATCH v2 3/4] StandaloneMmPkg: Support to unregister MMI handler inside MMI handler
Date: Wed, 28 Feb 2024 10:27:49 +0800 [thread overview]
Message-ID: <20240228022750.873-4-zhiguang.liu@intel.com> (raw)
In-Reply-To: <20240228022750.873-1-zhiguang.liu@intel.com>
To support unregister MMI handler inside MMI handler itself,
get next node before MMI handler is executed, since LIST_ENTRY that
Link points to may be freed if unregister MMI handler in MMI handler
itself.
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
---
StandaloneMmPkg/Core/Mmi.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/StandaloneMmPkg/Core/Mmi.c b/StandaloneMmPkg/Core/Mmi.c
index 0de6fd17fc..c1a1d76e85 100644
--- a/StandaloneMmPkg/Core/Mmi.c
+++ b/StandaloneMmPkg/Core/Mmi.c
@@ -154,9 +154,14 @@ MmiManage (
Head = &MmiEntry->MmiHandlers;
}
- for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {
+ for (Link = Head->ForwardLink; Link != Head;) {
MmiHandler = CR (Link, MMI_HANDLER, Link, MMI_HANDLER_SIGNATURE);
-
+ //
+ // To support unregister MMI handler inside MMI handler itself,
+ // get next node before handler is executed, since LIST_ENTRY that
+ // Link points to may be freed if unregister MMI handler.
+ //
+ Link = Link->ForwardLink;
Status = MmiHandler->Handler (
(EFI_HANDLE)MmiHandler,
Context,
--
2.31.1.windows.1
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#116074): https://edk2.groups.io/g/devel/message/116074
Mute This Topic: https://groups.io/mt/104616994/7686176
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io]
-=-=-=-=-=-=-=-=-=-=-=-
next prev parent reply other threads:[~2024-02-28 2:28 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-28 2:27 [edk2-devel] [PATCH v2 0/4] Support to unregister SMI handler inside SMI handler Zhiguang Liu
2024-02-28 2:27 ` [edk2-devel] [PATCH v2 1/4] MdeModulePkg/SMM: " Zhiguang Liu
2024-02-29 12:24 ` Ni, Ray
2024-02-28 2:27 ` [edk2-devel] [PATCH v2 2/4] MdeModulePkg/SMM: Disallow unregister SMI handler in other " Zhiguang Liu
2024-02-28 8:45 ` Laszlo Ersek
2024-02-28 8:52 ` Zhiguang Liu
2024-02-28 2:27 ` Zhiguang Liu [this message]
2024-02-28 8:47 ` [edk2-devel] [PATCH v2 3/4] StandaloneMmPkg: Support to unregister MMI handler inside MMI handler Laszlo Ersek
2024-02-29 12:24 ` Ni, Ray
2024-03-11 14:02 ` Ard Biesheuvel
2024-02-28 2:27 ` [edk2-devel] [PATCH v2 4/4] StandaloneMmPkg: Disallow unregister MMI handler in other " Zhiguang Liu
2024-02-28 8:47 ` Laszlo Ersek
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-list from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240228022750.873-4-zhiguang.liu@intel.com \
--to=devel@edk2.groups.io \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox