linux-kernel - Re: [PATCH v3 6/7] DMA: sun6i: Add driver for the Allwinner A31 DMA controller

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Message-ID: <20140310120558.GF2815@lukather>
Date:	Mon, 10 Mar 2014 13:05:58 +0100
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	"Shevchenko, Andriy" <andriy.shevchenko@...el.com>
Cc:	Emilio Lopez <emilio@...pez.com.ar>,
	"Williams, Dan J" <dan.j.williams@...el.com>,
	"Koul, Vinod" <vinod.koul@...el.com>,
	Mike Turquette <mturquette@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-sunxi@...glegroups.com" <linux-sunxi@...glegroups.com>,
	"kevin.z.m.zh@...il.com" <kevin.z.m.zh@...il.com>,
	"sunny@...winnertech.com" <sunny@...winnertech.com>,
	"shuge@...winnertech.com" <shuge@...winnertech.com>,
	"zhuzhenhua@...winnertech.com" <zhuzhenhua@...winnertech.com>
Subject: Re: [PATCH v3 6/7] DMA: sun6i: Add driver for the Allwinner A31 DMA
 controller

Hi Andriy,

On Wed, Mar 05, 2014 at 02:07:55PM +0000, Shevchenko, Andriy wrote:
> > +		return PTR_ERR(pll6);
> > +	}
> > +
> > +	ret = clk_set_parent(mux, pll6);
> > +	if (ret) {
> > +		dev_err(&pdev->dev, "Couldn't reparent AHB1 on PLL6\n");
> > +		return ret;
> > +	}
> > +
> > +	devm_clk_put(&pdev->dev, mux);
> > +	devm_clk_put(&pdev->dev, pll6);
> 
> Since you put those here, would it be better to use plain
> clk_get/clk_put ?

Actually, this allows to have no exit path for the case where one of
the calls between the first clk_get, and here. devm_clk_* makes error
handling much easier here, that's just all

I'll fix the other comments you had, and send a new version.

Thanks!
Maxime

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

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