[PATCH] ShellPkg: Move UnicodeCollation2 Protcol locate out of UefiShellLib constructor

[Tapan Shah <tapandshah@hpe.com>]

Move gEfiUnicodeCollation2ProtocolGuid protocol outside of UefiShellLib constructor
function.
Locate gEfiUnicodeCollation2ProtocolGuid protocol in ShellOpenFileByName() which
consumes this protocol API.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Tapan Shah <tapandshah@hpe.com>
---
 ShellPkg/Library/UefiShellLib/UefiShellLib.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/ShellPkg/Library/UefiShellLib/UefiShellLib.c b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
index e47d535..53f54e1 100644
--- a/ShellPkg/Library/UefiShellLib/UefiShellLib.c
+++ b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
@@ -292,18 +292,12 @@ ShellLibConstructor (
   IN EFI_SYSTEM_TABLE  *SystemTable
   )
 {
-  EFI_STATUS  Status;
-
   mEfiShellEnvironment2       = NULL;
   gEfiShellProtocol           = NULL;
   gEfiShellParametersProtocol = NULL;
   mEfiShellInterface          = NULL;
   mEfiShellEnvironment2Handle = NULL;
-
-  if (mUnicodeCollationProtocol == NULL) {
-    Status = gBS->LocateProtocol (&gEfiUnicodeCollation2ProtocolGuid, NULL, (VOID**)&mUnicodeCollationProtocol);
-    ASSERT_EFI_ERROR (Status);
-  }
+  mUnicodeCollationProtocol   = NULL;
 
   //
   // verify that auto initialize is not set false
@@ -730,6 +724,14 @@ ShellOpenFileByName(
                                                FileHandle,
                                                OpenMode);
 
+    if (mUnicodeCollationProtocol == NULL) {
+      Status = gBS->LocateProtocol (&gEfiUnicodeCollation2ProtocolGuid, NULL, (VOID**)&mUnicodeCollationProtocol);
+      if (EFI_ERROR (Status)) {
+        gEfiShellProtocol->CloseFile (*FileHandle);
+        return Status;
+      }
+    }
+
     if ((mUnicodeCollationProtocol->StriColl (mUnicodeCollationProtocol, (CHAR16*)FileName, L"NUL") != 0) &&
         (mUnicodeCollationProtocol->StriColl (mUnicodeCollationProtocol, (CHAR16*)FileName, L"NULL") != 0) &&
          !EFI_ERROR(Status) && ((OpenMode & EFI_FILE_MODE_CREATE) != 0)){
-- 
1.9.5.msysgit.0