linux-kernel - Re: [PATCH v2 07/14] regulator: s2mps11: Copy supported regulators from initconst

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Message-ID: <20140213190730.GB28112@sirena.org.uk>
Date:	Thu, 13 Feb 2014 19:07:30 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Sangbeom Kim <sbkim73@...sung.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Yadwinder Singh Brar <yadi.brar01@...il.com>
Subject: Re: [PATCH v2 07/14] regulator: s2mps11: Copy supported regulators
 from initconst

On Thu, Feb 13, 2014 at 10:14:00AM +0100, Krzysztof Kozlowski wrote:

> -	for (i = 0; i < S2MPS11_REGULATOR_CNT; i++)
> +	s2mps11->rdev = devm_kzalloc(&pdev->dev,
> +			sizeof(*s2mps11->rdev)*rdev_num, GFP_KERNEL);
> +	if (!s2mps11->rdev)
> +		return -ENOMEM;

If we're using managed allocations do we actually need to keep the rdev
table at all?  We only normally use it to free.

> +	rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata)*rdev_num, GFP_KERNEL);
> +	if (!rdata)
> +		return -ENOMEM;
> +

> +	/* rdata was needed only for of_regulator_match() during probe */
> +	if (rdata)
> +		devm_kfree(&pdev->dev, rdata);
> +

If this is always going to be freed within the probe path (in the same
function indeed) why is it a managed allocaton at all?

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