From 229a040b41a83577a5e72b5d3c83bb86040362f6 Mon Sep 17 00:00:00 2001
From: wangyue <wangyue41@huawei.com>
Date: Sat, 18 Mar 2017 09:04:11 +0800
Subject: Hisilicon: Fix ACPI/DSDT table checksum error

Refresh checksum after changing DSDT table.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Heyi Guo <heyi.guo@linaro.org>
Signed-off-by: Yi Li <phoenix.liyi@huawei.com>
Signed-off-by: Chenhui Sun <chenhui.sun@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
---
 Chips/Hisilicon/Drivers/AcpiPlatformDxe/EthMac.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Chips/Hisilicon/Drivers/AcpiPlatformDxe/EthMac.c b/Chips/Hisilicon/Drivers/AcpiPlatformDxe/EthMac.c
index 41f5692..1f74d31 100644
--- a/Chips/Hisilicon/Drivers/AcpiPlatformDxe/EthMac.c
+++ b/Chips/Hisilicon/Drivers/AcpiPlatformDxe/EthMac.c
@@ -442,6 +442,29 @@ static EFI_STATUS ProcessDSDT(
   return EFI_SUCCESS;
 }
 
+STATIC
+VOID
+AcpiCheckSum (
+  IN OUT  EFI_ACPI_SDT_HEADER *Table
+  )
+{
+  UINTN ChecksumOffset;
+  UINT8 *Buffer;
+
+  ChecksumOffset = OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER, Checksum);
+  Buffer = (UINT8 *)Table;
+
+  //
+  // set checksum to 0 first
+  //
+  Buffer[ChecksumOffset] = 0;
+
+  //
+  // Update checksum value
+  //
+  Buffer[ChecksumOffset] = CalculateCheckSum8 (Buffer, Table->Length);
+}
+
 EFI_STATUS EthMacInit(void)
 {
   EFI_STATUS              Status;
@@ -478,6 +501,7 @@ EFI_STATUS EthMacInit(void)
     ProcessDSDT(AcpiTableProtocol, TableHandle);
 
     AcpiTableProtocol->Close(TableHandle);
+    AcpiCheckSum (Table);
   }
 
   return EFI_SUCCESS;
-- 
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