[PATCH v4 8/9] MdeModulePkg/BdsDxe: Revert "fall back to UI loop before hanging"

[Ruiyu Ni <ruiyu.ni@intel.com>]

Commit d1de487dd2e77f4741abcbd71d19a8c93971fda0
"MdeModulePkg/BdsDxe: fall back to a Boot Manager Menu loop before
 hanging"
changed BDS core to fall back to UI loop when no bootable option
can be launched.
Now since PlatformBootManagerUnableToBoot() is added, the commit
can be reverted.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
---
 MdeModulePkg/Universal/BdsDxe/BdsEntry.c | 60 +++-----------------------------
 1 file changed, 4 insertions(+), 56 deletions(-)

diff --git a/MdeModulePkg/Universal/BdsDxe/BdsEntry.c b/MdeModulePkg/Universal/BdsDxe/BdsEntry.c
index 49e403e181..39b643c77a 100644
--- a/MdeModulePkg/Universal/BdsDxe/BdsEntry.c
+++ b/MdeModulePkg/Universal/BdsDxe/BdsEntry.c
@@ -634,55 +634,6 @@ BdsFormalizeEfiGlobalVariable (
   BdsFormalizeOSIndicationVariable ();
 }
 
-/**
-  Enter an infinite loop of calling the Boot Manager Menu.
-
-  This is a last resort alternative to BdsEntry() giving up for good. This
-  function never returns.
-
-  @param[in] BootManagerMenu  The EFI_BOOT_MANAGER_LOAD_OPTION located and/or
-                              created by the EfiBootManagerGetBootManagerMenu()
-                              call in BdsEntry().
-**/
-VOID
-BdsBootManagerMenuLoop (
-  IN EFI_BOOT_MANAGER_LOAD_OPTION *BootManagerMenu
-  )
-{
-  EFI_INPUT_KEY Key;
-
-  //
-  // Normally BdsDxe does not print anything to the system console, but this is
-  // a last resort -- the end-user will likely not see any DEBUG messages
-  // logged in this situation.
-  //
-  // AsciiPrint() will NULL-check gST->ConOut internally. We check gST->ConIn
-  // here to see if it makes sense to request and wait for a keypress.
-  //
-  if (gST->ConIn != NULL) {
-    AsciiPrint (
-      "%a: No bootable option or device was found.\n"
-      "%a: Press any key to enter the Boot Manager Menu.\n",
-      gEfiCallerBaseName,
-      gEfiCallerBaseName
-      );
-    BdsWaitForSingleEvent (gST->ConIn->WaitForKey, 0);
-
-    //
-    // Drain any queued keys.
-    //
-    while (!EFI_ERROR (gST->ConIn->ReadKeyStroke (gST->ConIn, &Key))) {
-      //
-      // just throw away Key
-      //
-    }
-  }
-
-  for (;;) {
-    EfiBootManagerBoot (BootManagerMenu);
-  }
-}
-
 /**
 
   Service routine for BdsInstance->Entry(). Devices are connected, the
@@ -1081,19 +1032,16 @@ BdsEntry (
     } while (BootSuccess);
   }
 
+  if (BootManagerMenuStatus != EFI_NOT_FOUND) {
+    EfiBootManagerFreeLoadOption (&BootManagerMenu);
+  }
+
   if (!BootSuccess) {
     LoadOptions = EfiBootManagerGetLoadOptions (&LoadOptionCount, LoadOptionTypePlatformRecovery);
     ProcessLoadOptions (LoadOptions, LoadOptionCount);
     EfiBootManagerFreeLoadOptions (LoadOptions, LoadOptionCount);
   }
 
-  //
-  // If BootManagerMenu is available, fall back to it indefinitely.
-  //
-  if (BootManagerMenuStatus != EFI_NOT_FOUND) {
-    BdsBootManagerMenuLoop (&BootManagerMenu);
-  }
-
   DEBUG ((EFI_D_ERROR, "[Bds] Unable to boot!\n"));
   CpuDeadLoop ();
 }
-- 
2.16.1.windows.1