From 112ade484a28b37af16339d710577821e4b6d907 Mon Sep 17 00:00:00 2001
From: Ken Sato <ken.sato.ty@hitachi-solutions.com>
Date: Thu, 31 Jan 2019 09:25:36 +0900
Subject: [PATCH] page_table: Fix return value of lookup_pte when ptl4 is blank

Change-Id: I5926fedda182941a4b7a2fe480bffb12d4069713
---
 arch/arm64/kernel/memory.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kernel/memory.c b/arch/arm64/kernel/memory.c
index a4fa67d6..f3e2b523 100644
--- a/arch/arm64/kernel/memory.c
+++ b/arch/arm64/kernel/memory.c
@@ -2580,6 +2580,8 @@ static pte_t *lookup_pte(translation_table_t* tt, uintptr_t virt, int pgshift,
 			pgshift = PTL3_CONT_SHIFT;
 		} else if (pgshift > PTL3_SHIFT) {
 			pgshift = PTL3_SHIFT;
+		} else {
+			ptep = NULL;
 		}
 		goto out;
 	}