OvmfPkg/AcpiPlatformDxe: Remove QEMU_ACPI_TABLE_NOTIFY_PROTOCOL

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4237

The QEMU_ACPI_TABLE_NOTIFY_PROTOCOL structure is superfluous because NULL
protocol interfaces have been used in edk2 repeatedly. A protocol instance
can exist in the protocol database with a NULL associated interface.
Therefore the QEMU_ACPI_TABLE_NOTIFY_PROTOCOL type, the
"QemuAcpiTableNotify.h" header, and the "mAcpiNotifyProtocol" global
variable can be removed.

Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Sebastien Boeuf <sebastien.boeuf@intel.com>
Reported-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
Message-Id: <20230111012235.189-2-min.m.xu@intel.com>
Reviewed-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/OvmfPkg/AcpiPlatformDxe/QemuFwCfgAcpi.c b/OvmfPkg/AcpiPlatformDxe/QemuFwCfgAcpi.c
index c8dee17c13..1a3852904d 100644
--- a/OvmfPkg/AcpiPlatformDxe/QemuFwCfgAcpi.c
+++ b/OvmfPkg/AcpiPlatformDxe/QemuFwCfgAcpi.c
@@ -19,10 +19,8 @@
 #include <Library/QemuFwCfgS3Lib.h>           // QemuFwCfgS3Enabled()

 #include <Library/UefiBootServicesTableLib.h> // gBS

 

-#include <Protocol/QemuAcpiTableNotify.h>

 #include "AcpiPlatform.h"

-EFI_HANDLE                       mQemuAcpiHandle = NULL;

-QEMU_ACPI_TABLE_NOTIFY_PROTOCOL  mAcpiNotifyProtocol;

+EFI_HANDLE  mQemuAcpiHandle = NULL;

 

 //

 // The user structure for the ordered collection that will track the fw_cfg

@@ -1284,7 +1282,7 @@ UninstallAcpiTables:
            &mQemuAcpiHandle,

            &gQemuAcpiTableNotifyProtocolGuid,

            EFI_NATIVE_INTERFACE,

-           &mAcpiNotifyProtocol

+           NULL

            );

   }