linux-kernel - Re: [PATCH v5 1/1] watchdog: Add tegra watchdog

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Message-ID: <20140212214956.GA30463@roeck-us.net>
Date:	Wed, 12 Feb 2014 13:49:56 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Andrew Chew <AChew@...dia.com>
Cc:	Stephen Warren <swarren@...dotorg.org>,
	"wim@...ana.be" <wim@...ana.be>,
	"rob@...dley.net" <rob@...dley.net>,
	"thierry.reding@...il.com" <thierry.reding@...il.com>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"abrestic@...omium.org" <abrestic@...omium.org>,
	"dgreid@...omium.org" <dgreid@...omium.org>,
	"katierh@...omium.org" <katierh@...omium.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v5 1/1] watchdog: Add tegra watchdog

On Wed, Feb 12, 2014 at 01:43:37PM -0800, Andrew Chew wrote:
> > > +static void tegra_wdt_unref(struct watchdog_device *wdd) {
> > > +	struct tegra_wdt *wdt = watchdog_get_drvdata(wdd);
> > > +
> > > +	kref_put(&wdt->kref, tegra_wdt_release_resources); }
> > 
> > I forget why these were needed; they seem to do nothing.
> 
> The reason I did the whole kref thing was by following the guidance
> in Documentation/watchdog/watchdog-kernel-api.txt, which says
> that if the watchdog_device struct is dynamically allocated, then
> one needs this.
> 
I read that too, but I could not follow the logic behind it,
nor the explanation provided with the commit introducing it ;-)

Guenter
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