TFTP : tftp fix for full volume case

Issue :
When storage media is full, tftp was resulting in ASSERT
MdeModulePkg/Core/Dxe/Mem/Page.c, because number of pages
was zero.

Reason:
While doing tftp, function call ShellWriteFile was modifying
FileSize variable. In case of full disk it was coming out to be
Zero.

Fix:
Storage the original filesize in local variable, and use this
variable while freeing the pages.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Udit Kumar <udit.kumar@nxp.com>
Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>
Signed-off-by: Vabhav Sharma <vabhav.sharma@nxp.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/ShellPkg/Library/UefiShellTftpCommandLib/Tftp.c b/ShellPkg/Library/UefiShellTftpCommandLib/Tftp.c
index 5c50797631..fbde3bfe60 100755
--- a/ShellPkg/Library/UefiShellTftpCommandLib/Tftp.c
+++ b/ShellPkg/Library/UefiShellTftpCommandLib/Tftp.c
@@ -284,6 +284,7 @@ ShellCommandRunTftp (
   EFI_HANDLE              Mtftp4ChildHandle;

   EFI_MTFTP4_PROTOCOL     *Mtftp4;

   UINTN                   FileSize;

+  UINTN                   DataSize;

   VOID                    *Data;

   SHELL_FILE_HANDLE       FileHandle;

   UINT16                  BlockSize;

@@ -294,6 +295,7 @@ ShellCommandRunTftp (
   AsciiRemoteFilePath = NULL;

   Handles             = NULL;

   FileSize            = 0;

+  DataSize            = 0;

   BlockSize           = MTFTP_DEFAULT_BLKSIZE;

 

   //

@@ -537,6 +539,7 @@ ShellCommandRunTftp (
       goto NextHandle;

     }

 

+    DataSize = FileSize;

     Status = ShellWriteFile (FileHandle, &FileSize, Data);

     if (!EFI_ERROR (Status)) {

       ShellStatus = SHELL_SUCCESS;

@@ -551,7 +554,7 @@ ShellCommandRunTftp (
     NextHandle:

 

     if (Data != NULL) {

-      gBS->FreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Data, EFI_SIZE_TO_PAGES (FileSize));

+      gBS->FreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Data, EFI_SIZE_TO_PAGES (DataSize));

     }

 

     CloseProtocolAndDestroyServiceChild (