From 54fcef6941197a97719e58d86c4658f3e61c24aa Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Tue, 25 Jul 2017 21:41:41 +0200
Subject: [PATCH] parisc: Suspend lockup detectors before system halt

commit 56188832a50f09998cb570ba3771a1d25c193c0e upstream.

Some machines can't power off the machine, so disable the lockup detectors to
avoid this watchdog BUG to show up every few seconds:
watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd-shutdow:1]

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/parisc/kernel/process.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index b64d7d21646ed..a45a67d526f8c 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -53,6 +53,7 @@
 #include <linux/uaccess.h>
 #include <linux/rcupdate.h>
 #include <linux/random.h>
+#include <linux/nmi.h>
 
 #include <asm/io.h>
 #include <asm/asm-offsets.h>
@@ -145,6 +146,7 @@ void machine_power_off(void)
 
 	/* prevent soft lockup/stalled CPU messages for endless loop. */
 	rcu_sysrq_start();
+	lockup_detector_suspend();
 	for (;;);
 }
 
-- 
2.47.3