回复: [edk2-devel] [PATCH EDK2 v1 1/1] MdeModulePkg/FileExplorerLib: remove redundant null pointer check
gaoliming
gaoliming at byosoft.com.cn
Wed Nov 25 03:26:47 UTC 2020
Agree this change. Reviewed-by: Liming Gao <gaoliming at byosoft.com.cn>
This patch can be merged after the stable tag 202011.
Thanks
Liming
> -----邮件原件-----
> 发件人: bounce+27952+67917+4905953+8761045 at groups.io
> <bounce+27952+67917+4905953+8761045 at groups.io> 代表 wenyi,xie via
> groups.io
> 发送时间: 2020年11月25日 9:53
> 收件人: devel at edk2.groups.io; jian.j.wang at intel.com; hao.a.wu at intel.com;
> dandan.bi at intel.com; eric.dong at intel.com
> 抄送: songdongkuang at huawei.com; xiewenyi2 at huawei.com
> 主题: [edk2-devel] [PATCH EDK2 v1 1/1] MdeModulePkg/FileExplorerLib:
> remove redundant null pointer check
>
> Since Info is a pointer of struct EFI_FILE_SYSTEM_VOLUME_LABEL,
> and this struct has only one member VolumeLabel which is char
> array. So Info and Info->VolumeLabel are point to the same
> address, and if Info != NULL, Info->VolumeLabel == NULL is
> always false, it's no necessary to do null pointer check again.
>
> Cc: Jian J Wang <jian.j.wang at intel.com>
> Cc: Hao A Wu <hao.a.wu at intel.com>
> Cc: Dandan Bi <dandan.bi at intel.com>
> Cc: Eric Dong <eric.dong at intel.com>
> Signed-off-by: Wenyi Xie <xiewenyi2 at huawei.com>
> ---
> MdeModulePkg/Library/FileExplorerLib/FileExplorer.c | 10 +++-------
> 1 file changed, 3 insertions(+), 7 deletions(-)
>
> diff --git a/MdeModulePkg/Library/FileExplorerLib/FileExplorer.c
> b/MdeModulePkg/Library/FileExplorerLib/FileExplorer.c
> index 58e49102593c..13a214b06af9 100644
> --- a/MdeModulePkg/Library/FileExplorerLib/FileExplorer.c
> +++ b/MdeModulePkg/Library/FileExplorerLib/FileExplorer.c
> @@ -821,13 +821,9 @@ LibFindFileSystem (
> if (Info == NULL) {
> VolumeLabel = L"NO FILE SYSTEM INFO";
> } else {
> - if (Info->VolumeLabel == NULL) {
> - VolumeLabel = L"NULL VOLUME LABEL";
> - } else {
> - VolumeLabel = Info->VolumeLabel;
> - if (*VolumeLabel == 0x0000) {
> - VolumeLabel = L"NO VOLUME LABEL";
> - }
> + VolumeLabel = Info->VolumeLabel;
> + if (*VolumeLabel == 0x0000) {
> + VolumeLabel = L"NO VOLUME LABEL";
> }
> }
> MenuEntry->DisplayString = AllocateZeroPool (MAX_CHAR);
> --
> 2.20.1.windows.1
>
>
>
>
>
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