From 7f4399ba405b6201fb318b43091703a34b1489ab Mon Sep 17 00:00:00 2001
From: Claudiu Manoil <claudiu.manoil@nxp.com>
Date: Thu, 9 May 2019 03:07:12 +0000
Subject: [PATCH] ptp_qoriq: fix NULL access if ptp dt node missing

Make sure ptp dt node exists before accessing it in case
of NULL pointer call trace.

Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/ptp/ptp_qoriq.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/ptp/ptp_qoriq.c b/drivers/ptp/ptp_qoriq.c
index 5377536..e106424 100644
--- a/drivers/ptp/ptp_qoriq.c
+++ b/drivers/ptp/ptp_qoriq.c
@@ -467,6 +467,9 @@ int ptp_qoriq_init(struct ptp_qoriq *ptp_qoriq, void __iomem *base,
 	unsigned long flags;
 	u32 tmr_ctrl;
 
+	if (!node)
+		return -ENODEV;
+
 	ptp_qoriq->base = base;
 	ptp_qoriq->caps = *caps;
 
-- 
2.7.4