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Re: [PATCH 2/5] watchdog: octeon: Handle the FROZEN hot plug notifier actions.

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  Re: [PATCH 2/5] watchdog: octeon: Handle the FROZEN hot plug notifier actions. Wim Van Sebroeck <wim@iguana.be> - 2016-05-14 19:00 +0200

#1401116 — Re: [PATCH 2/5] watchdog: octeon: Handle the FROZEN hot plug notifier actions.

Hi Richard,

> When performing a suspend operation, the kernel brings all of the
> non-boot CPUs offline, calling the hot plug notifiers with the flag,
> CPU_TASKS_FROZEN, set in the action code.  Similarly, during resume,
> the CPUs are brought back online, but again the notifiers have the
> FROZEN flag set.
> 
> While some very few drivers really need to treat suspend/resume
> specially, this driver unintentionally ignores the notifications.
> 
> This patch changes the driver to disable the watchdog interrupt
> whenever the CPU goes offline, and to enable it whenever the CPU goes
> back online.  As a result, the suspended state is no longer a special
> case that leaves the watchdog active.
> 
> Cc: Wim Van Sebroeck <wim@iguana.be>
> Cc: Guenter Roeck <linux@roeck-us.net>
> Cc: linux-watchdog@vger.kernel.org
> Signed-off-by: Richard Cochran <rcochran@linutronix.de>
> ---
>  drivers/watchdog/octeon-wdt-main.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

This patch has been added to linux-watchdog-next.

Kind regards,
Wim.

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