linux-kernel - Re: [RFC, PATCH 3/3] clk: add warnings for incorrect enable/prepare semantics

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Date:	Tue, 15 Feb 2011 10:00:28 +0800
From:	Jeremy Kerr <jeremy.kerr@...onical.com>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Richard Zhao <richard.zhao@...escale.com>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Dima Zavin <dmitriyz@...gle.com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	linux-sh@...r.kernel.org,
	Ben Herrenschmidt <benh@...nel.crashing.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	linux-kernel@...r.kernel.org, Paul Mundt <lethal@...ux-sh.org>,
	Saravana Kannan <skannan@...eaurora.org>,
	Ben Dooks <ben-linux@...ff.org>,
	"Uwe Kleine-König" 
	<u.kleine-koenig@...gutronix.de>,
	Russell King <linux@....linux.org.uk>
Subject: Re: [RFC, PATCH 3/3] clk: add warnings for incorrect enable/prepare semantics

Hi Richard,

> >  void clk_unprepare(struct clk *clk)
> >  {
> > 
> > +	WARN_ON(clk->enable_count != 0);
> > +
> 
> Other drivers may be using the clock and increased the enable_count.
> This check may be moved to where we actually do unprepare.

Of course, thanks. Will update the series.


Jeremy
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