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MdeModulePkg VariablePei: Return GetVariable() attr if EFI_BUFFER_TOO_SMALL 

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2062

This commit makes the behavior for PeiGetVariable() match the following
specification-defined behavior. It is now consistent with the DXE/SMM
variable driver implementation.

The UEFI specification v2.8 Errata A Section 8.2 "GetVariable()"
"Attributes" parameter description states:

"If not NULL, a pointer to the memory location to return the
 attributes bitmask for the variable. See 'Related Definitions.'
 If not NULL, then Attributes is set on output both when
 EFI_SUCCESS and when EFI_BUFFER_TOO_SMALL is returned."

The attributes were previously only returned from the implementation
in Variable.c on EFI_SUCCESS. They are now returned on EFI_SUCCESS or
EFI_BUFFER_TOO_SMALL according to spec.

Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Guomin Jiang <guomin.jiang@intel.com>
This commit is contained in:
Michael Kubacki 2020-03-28 05:55:35 +08:00 committed by mergify[bot]
parent edf88807f7
commit 91a33d4113
1 changed files with 10 additions and 9 deletions
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19
MdeModulePkg/Universal/Variable/Pei/Variable.c
View File

@ -3,6 +3,7 @@
PEI ReadOnly Varaiable2 PPI. These services operates the non volatile storage space.
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) Microsoft Corporation.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -1047,17 +1048,17 @@ PeiGetVariable (
}
GetVariableNameOrData (&StoreInfo, GetVariableDataPtr (Variable.CurrPtr, VariableHeader, StoreInfo.AuthFlag), VarDataSize, Data);
if (Attributes != NULL) {
*Attributes = VariableHeader->Attributes;
}
*DataSize = VarDataSize;
return EFI_SUCCESS;
Status = EFI_SUCCESS;
} else {
*DataSize = VarDataSize;
return EFI_BUFFER_TOO_SMALL;
Status = EFI_BUFFER_TOO_SMALL;
}
if (Attributes != NULL) {
*Attributes = VariableHeader->Attributes;
}
*DataSize = VarDataSize;
return Status;
}
/**