linux-kernel - [PATCH] ARM: machine_power

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Date:	Mon, 24 Mar 2014 11:13:04 -0700
From:	Sebastian Capella <sebastian.capella@...aro.org>
To:	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	linaro-kernel@...ts.linaro.org
Cc:	Sebastian Capella <sebastian.capella@...aro.org>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: [PATCH] ARM: machine_power_off should not return

Add loop to prevent return from machine_power_off if
pm_power_off is null or does not halt the system.
This caused a panic during hibernation testing on Kirkwood
Openblocks A6 board.

Signed-off-by: Sebastian Capella <sebastian.capella@...aro.org>
Reported-by: Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
Cc: Len Brown <len.brown@...el.com>
Cc: Pavel Machek <pavel@....cz>
Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>
---
 arch/arm/kernel/process.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index f58b723..6ffdc2c 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -217,6 +217,8 @@ void machine_power_off(void)
 
 	if (pm_power_off)
 		pm_power_off();
+	while (1)
+		cpu_relax();
 }
 
 /*
-- 
1.7.9.5

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