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Date:	Mon, 14 Jul 2014 16:11:19 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	"linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Wim Van Sebroeck <wim@...ana.be>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Will Deacon <Will.Deacon@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Heiko Stuebner <heiko@...ech.de>,
	Russell King <linux@....linux.org.uk>,
	Jonas Jensen <jonas.jensen@...il.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...nel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Tomasz Figa <t.figa@...sung.com>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 5/7] watchdog: moxart: Register restart handler with
 restart notifier

On Mon, Jul 14, 2014 at 03:41:15PM +0100, Guenter Roeck wrote:
> On 07/14/2014 07:19 AM, Catalin Marinas wrote:
> > On Sun, Jul 13, 2014 at 04:30:29PM +0100, Guenter Roeck wrote:
> >> diff --git a/drivers/watchdog/moxart_wdt.c b/drivers/watchdog/moxart_wdt.c
> >> index 4aa3a8a..5080b50 100644
> >> --- a/drivers/watchdog/moxart_wdt.c
> >> +++ b/drivers/watchdog/moxart_wdt.c
> > [...]
> >> -static void moxart_wdt_restart(enum reboot_mode reboot_mode, const char *cmd)
> >> +static int moxart_restart_notify(struct notifier_block *this,
> >> +				 unsigned long mode, void *cmd)
> >>   {
> >> -	writel(1, moxart_restart_ctx->base + REG_COUNT);
> >> -	writel(0x5ab9, moxart_restart_ctx->base + REG_MODE);
> >> -	writel(0x03, moxart_restart_ctx->base + REG_ENABLE);
> >> +	struct moxart_wdt_dev *moxart_wdt = container_of(this,
> >> +							 struct moxart_wdt_dev,
> >> +							 restart_notifier);
> >> +	writel(1, moxart_wdt->base + REG_COUNT);
> >> +	writel(0x5ab9, moxart_wdt->base + REG_MODE);
> >> +	writel(0x03, moxart_wdt->base + REG_ENABLE);
> >> +
> >> +	return NOTIFY_DONE;
> >>   }
> >
> > Wondering whether NOTIFY_OK or even NOTIFY_STOP_MASK is better here.
> 
> Personally I would rather call all of them if more than one notifier is
> registered to ensure that (at least) one does what it is intended to do,
> but I am open to suggestions.

Probably fine. I guess there won't be more than one handler registered
in most cases anyway.

-- 
Catalin
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