linux-kernel - Re: [PATCH v2 3/8] watchdog: at91rm9200: use the regmap from mfd

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Message-ID: <20150112140836.GL2447@piout.net>
Date:	Mon, 12 Jan 2015 15:08:36 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Wim Van Sebroeck <wim@...ana.be>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-watchdog@...r.kernel.org
Subject: Re: [PATCH v2 3/8] watchdog: at91rm9200: use the regmap from mfd

On 10/01/2015 at 17:14:00 -0800, Guenter Roeck wrote :
> Not sure I understand what my comment has to do with 'parent'.
> 
> The fact that the code checks if it has already been instantiated
> suggests that the original author of the driver was concerned about
> that case. Since you did not remove that check I have to assume that
> this can still happen. If so, the second instantiation attempt will
> overwrite regmap_st, since that variable is written prior to checking
> for the dual instantiation.
> 

I'll move the regmap_st assignment after the check. But I really believe
it will never be probed more than once.

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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