From 2503b6d7fbfdecef90b3c22b23c03a2420d4660b Mon Sep 17 00:00:00 2001
From: Gaurav Kashyap <gaurkash@codeaurora.org>
Date: Mon, 8 Jul 2019 15:28:50 -0700
Subject: avb: Fix antirollback check for non HLOS images

Fix the check for Update Rollback syscall returned
from TZ.

Change-Id: I2ed86277b2f150a569c4425f65cacc756470f77d
---
 QcomModulePkg/Library/avb/libavb/avb_util.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/QcomModulePkg/Library/avb/libavb/avb_util.c b/QcomModulePkg/Library/avb/libavb/avb_util.c
index b419f1b64a..b253e2016e 100644
--- a/QcomModulePkg/Library/avb/libavb/avb_util.c
+++ b/QcomModulePkg/Library/avb/libavb/avb_util.c
@@ -723,12 +723,14 @@ EFI_STATUS UpdateRollbackSyscall ()
       Status = EFI_FAILURE;
       return Status;
     }
-    if (SysCallRsp->status != EFI_SUCCESS) {
+    if (SysCallRsp->status != 1) {
       Status = SysCallRsp->status;
       DEBUG(( EFI_D_ERROR, "TZ_UPDATE_ROLLBACK_VERSION_ID failed, "
                     "Status = (0x%x)\r\n", Status));
       return Status;
     }
+  } else {
+    DEBUG ((EFI_D_WARN, "UpdateRollbackSyscall: Older TZ, skipping update"));
   }
   return Status;
 }
-- 
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