[PATCH 4.12 07/31] parisc: Suspend lockup detectors before system halt

Greg Kroah-Hartman
2017-08-03T23:24:35Z

From: Helge Deller <deller@gmx.de>

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(+)

--- 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 (;;);
}