linux-kernel - Re: [PATCH v2] serial: rewrite pxa2xx-uart to use 8250

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Message-ID: <20131209084425.GO24559@pengutronix.de>
Date:	Mon, 9 Dec 2013 09:44:25 +0100
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:	Sergei Ianovich <ynvich@...il.com>, linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	James Cameron <quozl@...top.org>,
	Russell King <linux@....linux.org.uk>,
	Jiri Slaby <jslaby@...e.cz>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Zhou Zhu <zzhu3@...vell.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Stefan Seyfried <seife+kernel@...systems.com>,
	John Crispin <blogic@...nwrt.org>,
	Paul Bolle <pebolle@...cali.nl>,
	"moderated list:ARM PORT" <linux-arm-kernel@...ts.infradead.org>,
	"open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
	"open list:OPEN FIRMWARE AND..." <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2] serial: rewrite pxa2xx-uart to use 8250_core

On Mon, Dec 09, 2013 at 10:38:15AM +0200, Heikki Krogerus wrote:
> Hi,
> 
> > +	return 0;
> > +
> > + err_clk:
> > +	clk_unprepare(data->clk);
> > + err_free_clk:
> > +	devm_clk_put(&pdev->dev, data->clk);
> > + err_free:
> > +	devm_kfree(&pdev->dev, data);
> 
> And there labels could be dropped.

This should really be fixed. Explicitly releasing devm_* allocated
resources invalidates the whole idea of the devm functions. People
looking for templates shouldn't find examples for this in the kernel.

Sascha

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