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ARM: 7466/1: disable interrupt before spinning endlessly

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commit 98bd8b96b2 upstream.

The CPU will endlessly spin at the end of machine_halt and
machine_restart calls.  However, this will lead to a soft lockup
warning after about 20 seconds, if CONFIG_LOCKUP_DETECTOR is enabled,
as system timer is still alive.

Disable interrupt before going to spin endlessly, so that the lockup
warning will never be seen.

Reported-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shawn Guo 2012-07-13 08:19:34 +01:00 committed by Greg Kroah-Hartman
parent ce6f0ff8d1
commit 05aa0d1bc9
1 changed files with 2 additions and 0 deletions
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2
arch/arm/kernel/process.c
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@ -267,6 +267,7 @@ void machine_shutdown(void)
void machine_halt(void)
{
machine_shutdown();
local_irq_disable();
while (1);
}
@ -288,6 +289,7 @@ void machine_restart(char *cmd)
/* Whoops - the platform was unable to reboot. Tell the user! */
printk("Reboot failed -- System halted\n");
local_irq_disable();
while (1);
}