[edk2-devel] [PATCH] MdeModulePkg: Initialize local variable value before they are used
Laszlo Ersek
lersek at redhat.com
Thu Mar 11 17:21:44 UTC 2021
Hi Liming,
On 03/09/21 02:24, gaoliming wrote:
> This change is to fix the compiler error on GCC49 release build.
>
> Cc: Jian J Wang <jian.j.wang at intel.com>
> Cc: Hao A Wu <hao.a.wu at intel.com>
> Signed-off-by: Liming Gao <gaoliming at byosoft.com.cn>
> ---
> MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c | 1 +
> .../Library/VariablePolicyHelperLib/VariablePolicyHelperLib.c | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
> index e99a812a44..0779f94f9e 100644
> --- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
> +++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
> @@ -1122,6 +1122,7 @@ AhciDmaTransfer (
>
> Map = NULL;
> PciIo = Instance->PciIo;
> + Status = EFI_SUCCESS;
>
> if (PciIo == NULL) {
> return EFI_INVALID_PARAMETER;
> diff --git a/MdeModulePkg/Library/VariablePolicyHelperLib/VariablePolicyHelperLib.c b/MdeModulePkg/Library/VariablePolicyHelperLib/VariablePolicyHelperLib.c
> index 0c9299c8b0..7822cbf4bb 100644
> --- a/MdeModulePkg/Library/VariablePolicyHelperLib/VariablePolicyHelperLib.c
> +++ b/MdeModulePkg/Library/VariablePolicyHelperLib/VariablePolicyHelperLib.c
> @@ -117,6 +117,7 @@ CreateBasicVariablePolicy (
>
> // Now we've gotta determine the total size of the buffer required for
> // the VariablePolicy structure.
> + NameSize = 0;
> TotalSize = sizeof( VARIABLE_POLICY_ENTRY );
> if (Name != NULL) {
> NameSize = StrnSizeS( Name, MAX_UINT16 );
>
(1) we have a bugzilla ticket related to this (or more precisely,
overlapping AtaAtapiPassThru):
https://bugzilla.tianocore.org/show_bug.cgi?id=3228
I think mentioning the BZ in the commit message might make sense.
(2) Recently we have used a special comment format for such assignments.
Namely:
//
// Set Status to suppress incorrect compiler/analyzer warnings
//
Status = EFI_SUCCESS;
Hao already requested that we should document that we only suppress
compiler false positives with these assignments -- they are not needed
functionally. However, I think saying so in the commit message *only* is
not sufficient. I think we should stick with the above code-comment
format (which we've used recently in several places).
Thanks!
Laszlo
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