1 files changed, 13 insertions, 8 deletions

diff --git a/MdePkg/Include/Uefi/UefiSpec.h b/MdePkg/Include/Uefi/UefiSpec.h
index b34978f2f3..ba263e9a2b 100644
--- a/MdePkg/Include/Uefi/UefiSpec.h
+++ b/MdePkg/Include/Uefi/UefiSpec.h
@@ -653,23 +653,28 @@ EFI_STATUS
 /**

   Sets the value of a variable.

 

-  @param  VariableName          A Null-terminated Unicode string that is the name of the

-                                vendor's variable.

-  @param  VendorGuid            A unique identifier for the vendor.

-  @param  Attributes            Attributes bitmask to set for the variable.

-  @param  DataSize              The size in bytes of the Data buffer.

-  @param  Data                  The contents for the variable.

+  @param  VariableName           A Null-terminated string that is the name of the vendor's variable.

+                                 Each VariableName is unique for each VendorGuid. VariableName must

+                                 contain 1 or more characters. If VariableName is an empty string,

+                                 then EFI_INVALID_PARAMETER is returned.

+  @param  VendorGuid             A unique identifier for the vendor.

+  @param  Attributes             Attributes bitmask to set for the variable.

+  @param  DataSize               The size in bytes of the Data buffer. A size of zero causes the

+                                 variable to be deleted.

+  @param  Data                   The contents for the variable.

 

   @retval EFI_SUCCESS            The firmware has successfully stored the variable and its data as

                                  defined by the Attributes.

   @retval EFI_INVALID_PARAMETER  An invalid combination of attribute bits was supplied, or the

                                  DataSize exceeds the maximum allowed.

-  @retval EFI_INVALID_PARAMETER  VariableName is an empty Unicode string.

+  @retval EFI_INVALID_PARAMETER  VariableName is an empty string.

   @retval EFI_OUT_OF_RESOURCES   Not enough storage is available to hold the variable and its data.

   @retval EFI_DEVICE_ERROR       The variable could not be retrieved due to a hardware error.

   @retval EFI_WRITE_PROTECTED    The variable in question is read-only.

   @retval EFI_WRITE_PROTECTED    The variable in question cannot be deleted.

-  @retval EFI_SECURITY_VIOLATION The variable could not be retrieved due to an authentication failure.

+  @retval EFI_SECURITY_VIOLATION The variable could not be written due to EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS

+                                 set but the AuthInfo does NOT pass the validation check carried out

+                                 by the firmware.

   @retval EFI_NOT_FOUND          The variable trying to be updated or deleted was not found.

 

 **/