diff --git a/MdeModulePkg/Universal/BdsDxe/BdsEntry.c b/MdeModulePkg/Universal/BdsDxe/BdsEntry.c index ac5f9088dd..a6fe617b56 100644 --- a/MdeModulePkg/Universal/BdsDxe/BdsEntry.c +++ b/MdeModulePkg/Universal/BdsDxe/BdsEntry.c @@ -808,7 +808,8 @@ BdsEntry ( ASSERT_EFI_ERROR (Status); // - // Cache and remove the "BootNext" NV variable. + // Cache the "BootNext" NV variable before calling any PlatformBootManagerLib APIs + // This could avoid the "BootNext" set by PlatformBootManagerLib be consumed in this boot. // GetEfiGlobalVariable2 (EFI_BOOT_NEXT_VARIABLE_NAME, (VOID **) &BootNext, &DataSize); if (DataSize != sizeof (UINT16)) { @@ -817,17 +818,6 @@ BdsEntry ( } BootNext = NULL; } - Status = gRT->SetVariable ( - EFI_BOOT_NEXT_VARIABLE_NAME, - &gEfiGlobalVariableGuid, - 0, - 0, - NULL - ); - // - // Deleting NV variable shouldn't fail unless it doesn't exist. - // - ASSERT (Status == EFI_SUCCESS || Status == EFI_NOT_FOUND); // // Initialize the platform language variables @@ -1052,10 +1042,25 @@ BdsEntry ( EfiBootManagerHotkeyBoot (); - // - // Boot to "BootNext" - // if (BootNext != NULL) { + // + // Delete "BootNext" NV variable before transferring control to it to prevent loops. + // + Status = gRT->SetVariable ( + EFI_BOOT_NEXT_VARIABLE_NAME, + &gEfiGlobalVariableGuid, + 0, + 0, + NULL + ); + // + // Deleting NV variable shouldn't fail unless it doesn't exist. + // + ASSERT (Status == EFI_SUCCESS || Status == EFI_NOT_FOUND); + + // + // Boot to "BootNext" + // UnicodeSPrint (BootNextVariableName, sizeof (BootNextVariableName), L"Boot%04x", *BootNext); Status = EfiBootManagerVariableToLoadOption (BootNextVariableName, &LoadOption); if (!EFI_ERROR (Status)) {