[PATCH] ARM: machine_power_off should not return

[Sebastian Capella]

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@xxxxxxxxxx>
Reported-by: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx>
Cc: Len Brown <len.brown@xxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
---
 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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