Add a lock to protect the critical region in Service APIs for gEfiBlockIoProtocolGuid...

[mirror_edk2.git] / EdkNt32Pkg / Dxe / WinNtThunk / Bus / BlockIo / WinNtBlockIo.c

diff --git a/EdkNt32Pkg/Dxe/WinNtThunk/Bus/BlockIo/WinNtBlockIo.c b/EdkNt32Pkg/Dxe/WinNtThunk/Bus/BlockIo/WinNtBlockIo.c
index c160aaf8361df799e33cf4387ed893385dc5d223..143d6b5a1eeca5a869782b7753222376df293d57 100644 (file)
--- a/EdkNt32Pkg/Dxe/WinNtThunk/Bus/BlockIo/WinNtBlockIo.c
+++ b/EdkNt32Pkg/Dxe/WinNtThunk/Bus/BlockIo/WinNtBlockIo.c
@@ -1,6 +1,6 @@
 /*++\r
 \r
-Copyright (c) 2006, Intel Corporation\r
+Copyright (c) 2006 - 2007, Intel Corporation\r
 All rights reserved. This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
@@ -851,25 +851,33 @@ WinNtBlockIoReadBlocks (
   BOOL                    Flag;\r
   EFI_STATUS              Status;\r
   DWORD                   BytesRead;\r
+  EFI_TPL                 OldTpl;\r
+\r
+  OldTpl = gBS->RaiseTPL (EFI_TPL_CALLBACK);\r
 \r
   Private = WIN_NT_BLOCK_IO_PRIVATE_DATA_FROM_THIS (This);\r
 \r
   Status  = WinNtBlockIoReadWriteCommon (Private, MediaId, Lba, BufferSize, Buffer, "WinNtReadBlocks");\r
   if (EFI_ERROR (Status)) {\r
-    return Status;\r
+    goto Done;\r
   }\r
 \r
   Flag = Private->WinNtThunk->ReadFile (Private->NtHandle, Buffer, (DWORD) BufferSize, (LPDWORD) &BytesRead, NULL);\r
   if (!Flag || (BytesRead != BufferSize)) {\r
     DEBUG ((EFI_D_INIT, "ReadBlocks: ReadFile failed. (%d)\n", Private->WinNtThunk->GetLastError ()));\r
-    return WinNtBlockIoError (Private);\r
+    Status = WinNtBlockIoError (Private);\r
+    goto Done;\r
   }\r
 \r
   //\r
   // If we wrote then media is present.\r
   //\r
   This->Media->MediaPresent = TRUE;\r
-  return EFI_SUCCESS;\r
+  Status = EFI_SUCCESS;\r
+\r
+Done:\r
+  gBS->RestoreTPL (OldTpl);\r
+  return Status;\r
 }\r
 \r
 STATIC\r
@@ -911,18 +919,22 @@ WinNtBlockIoWriteBlocks (
   UINTN                   BytesWritten;\r
   BOOL                    Flag;\r
   EFI_STATUS              Status;\r
+  EFI_TPL                 OldTpl;\r
+\r
+  OldTpl = gBS->RaiseTPL (EFI_TPL_CALLBACK);\r
 \r
   Private = WIN_NT_BLOCK_IO_PRIVATE_DATA_FROM_THIS (This);\r
 \r
   Status  = WinNtBlockIoReadWriteCommon (Private, MediaId, Lba, BufferSize, Buffer, "WinNtWriteBlocks");\r
   if (EFI_ERROR (Status)) {\r
-    return Status;\r
+    goto Done;\r
   }\r
 \r
   Flag = Private->WinNtThunk->WriteFile (Private->NtHandle, Buffer, (DWORD) BufferSize, (LPDWORD) &BytesWritten, NULL);\r
   if (!Flag || (BytesWritten != BufferSize)) {\r
     DEBUG ((EFI_D_INIT, "ReadBlocks: WriteFile failed. (%d)\n", Private->WinNtThunk->GetLastError ()));\r
-    return WinNtBlockIoError (Private);\r
+    Status = WinNtBlockIoError (Private);\r
+    goto Done;\r
   }\r
 \r
   //\r
@@ -930,7 +942,12 @@ WinNtBlockIoWriteBlocks (
   //\r
   This->Media->MediaPresent = TRUE;\r
   This->Media->ReadOnly     = FALSE;\r
-  return EFI_SUCCESS;\r
+  Status = EFI_SUCCESS;\r
+\r
+Done:\r
+  OldTpl = gBS->RaiseTPL (EFI_TPL_CALLBACK);\r
+  return Status;\r
+\r
 }\r
 \r
 STATIC\r
@@ -981,6 +998,9 @@ WinNtBlockIoResetBlock (
 --*/\r
 {\r
   WIN_NT_BLOCK_IO_PRIVATE *Private;\r
+  EFI_TPL                 OldTpl;\r
+\r
+  OldTpl = gBS->RaiseTPL (EFI_TPL_CALLBACK);\r
 \r
   Private = WIN_NT_BLOCK_IO_PRIVATE_DATA_FROM_THIS (This);\r
 \r
@@ -989,6 +1009,8 @@ WinNtBlockIoResetBlock (
     Private->NtHandle = INVALID_HANDLE_VALUE;\r
   }\r
 \r
+  gBS->RestoreTPL (OldTpl);\r
+\r
   return EFI_SUCCESS;\r
 }\r
 \r