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 <gaolim...@byosoft.com.cn>
Cc: Jiaxin Wu <jiaxin...@intel.com>
Reviewed-by: Ray Ni <ray...@intel.com>
Reviewed-by: Laszlo Ersek <ler...@redhat.com>
Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org>
Cc: Sami Mujawar <sami.muja...@arm.com>
Signed-off-by: Zhiguang Liu <zhiguang....@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
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