linux-kernel - Re: [PATCH 13/13] clk: basic: improve parent

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Date:	Mon, 16 Apr 2012 22:52:59 +0200
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Mike Turquette <mturquette@...aro.org>
Cc:	arnd.bergmann@...aro.org, Andrew Lunn <andrew@...n.ch>,
	Rajendra Nayak <rnayak@...com>, patches@...aro.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	linux-kernel@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	Saravana Kannan <skannan@...eaurora.org>,
	Shawn Guo <shawn.guo@...escale.com>,
	Olof Johansson <olof@...om.net>, linaro-dev@...ts.linaro.org,
	Richard Zhao <richard.zhao@...aro.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 13/13] clk: basic: improve parent_names & return errors

On Wed, Apr 11, 2012 at 06:02:51PM -0700, Mike Turquette wrote:
> This patch is the basic clk version of 'clk: core: copy parent_names &
> return error codes'.
> 
> The registration functions are changed to allow the core code to copy
> the array of strings and allow platforms to declare those arrays as
> __initdata.
> 
> This patch also converts all of the basic clk registration functions to
> return error codes which better aligns them with the existing clk.h api.
> 
> 
> + */
>  struct clk *clk_register_divider(struct device *dev, const char *name,
>  		const char *parent_name, unsigned long flags,
>  		void __iomem *reg, u8 shift, u8 width,
>  		u8 clk_divider_flags, spinlock_t *lock)
>  {
>  	struct clk_divider *div;
> -	struct clk *clk;
> +	struct clk *clk = ERR_PTR(-ENOMEM);
> +	const char *parent_names[1];
>  
> +	/* allocate the divider */
>  	div = kzalloc(sizeof(struct clk_divider), GFP_KERNEL);
> -
>  	if (!div) {
>  		pr_err("%s: could not allocate divider clk\n", __func__);
>  		return NULL;

You missed a conversion to ERR_PTR here.

Sascha

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