linux-kernel - Re: [PATCH/RFC 5/6] staging: board: Add support for devices with complex dependencies

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Date:	Fri, 3 Apr 2015 18:04:08 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	Geert Uytterhoeven <geert+renesas@...der.be>,
	devel@...verdev.osuosl.org, devicetree@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>,
	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
	linux-pm@...r.kernel.org, Marc Zyngier <marc.zyngier@....com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-sh@...r.kernel.org, Magnus Damm <damm+renesas@...nsource.se>,
	linux-kernel@...r.kernel.org,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Simon Horman <horms+renesas@...ge.net.au>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH/RFC 5/6] staging: board: Add support for devices with
 complex dependencies

On Fri, Apr 03, 2015 at 03:57:27PM +0300, Dan Carpenter wrote:
> On Fri, Apr 03, 2015 at 02:42:02PM +0200, Geert Uytterhoeven wrote:
> > +int __init board_staging_register_clock(const struct board_staging_clk *bsc)
> > +{
> > +	struct clk *clk;
> > +	int error;
> > +
> > +	pr_debug("Registering clock %s for con_id %s dev_id %s\n", bsc->clk,
> > +		 bsc->con_id, bsc->dev_id);
> > +	clk = clk_get(NULL, bsc->clk);
> > +	if (IS_ERR(clk)) {
> > +		error = PTR_ERR(clk);
> > +		pr_err("Failed to get clock %s (%d)\n", bsc->clk, error);
> > +		return error;
> > +	}
> > +
> > +	error = clk_register_clkdev(clk, bsc->con_id, bsc->dev_id);
> > +	if (error)
> > +		pr_err("Failed to register clock %s (%d)\n", bsc->clk, error);
> > +		return error;
> 
> Missing curly braces.  Also it's weird that don't we need a clk_put()
> on the error patch as well as the success path?

What's also concerning is that this is an abuse of this.

clk_register_clkdev() is supposed to be used with clocks created with
the CCF functions, it's not for creating aliases.

We have clk_add_alias() which does *everything* that this function does,
only in a less buggy way.

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