MdeModulePkg Variable: Minor update to the Data parameter for GetVariable()

[mirror_edk2.git] / MdeModulePkg / Universal / Variable / EmuRuntimeDxe / InitVariable.c

diff --git a/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/InitVariable.c b/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/InitVariable.c
index d636fcf20d2c663f40ee3fa92d5ca58ec4b7eda7..1feedc07c332eb0180a3b8e635d1a52f8f8e8102 100644 (file)
--- a/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/InitVariable.c
+++ b/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/InitVariable.c
@@ -3,7 +3,7 @@
   Implment all four UEFI runtime variable services and \r
   install variable architeture protocol.\r
   \r
-Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r
 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
@@ -27,7 +27,8 @@ EFI_EVENT   mVirtualAddressChangeEvent = NULL;
   @param Attributes                 Attribute value of the variable found.\r
   @param DataSize                   Size of Data found. If size is less than the\r
                                     data, this value contains the required size.\r
-  @param Data                       Data pointer.\r
+  @param Data                       The buffer to return the contents of the variable. May be NULL\r
+                                    with a zero DataSize in order to determine the size buffer needed.\r
                       \r
   @return EFI_INVALID_PARAMETER     Invalid parameter\r
   @return EFI_SUCCESS               Find the specified variable\r
@@ -42,7 +43,7 @@ RuntimeServiceGetVariable (
   IN EFI_GUID      *VendorGuid,\r
   OUT UINT32       *Attributes OPTIONAL,\r
   IN OUT UINTN     *DataSize,\r
-  OUT VOID         *Data\r
+  OUT VOID         *Data OPTIONAL\r
   )\r
 {\r
   return EmuGetVariable (\r