linux-kernel - Re: [PATCH v4 5/7] ARM: imx: Add common imx cpuidle init functionality.

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Message-ID: <20120516175515.GX30400@pengutronix.de>
Date:	Wed, 16 May 2012 19:55:15 +0200
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Robert Lee <rob.lee@...aro.org>
Cc:	kernel@...gutronix.de, shawn.guo@...aro.org,
	u.kleine-koenig@...gutronix.de, richard.zhao@...escale.com,
	amit.kucheria@...aro.org, daniel.lezcano@...aro.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linaro-dev@...ts.linaro.org, patches@...aro.org, jj@...osbits.net
Subject: Re: [PATCH v4 5/7] ARM: imx: Add common imx cpuidle init
 functionality.

On Tue, May 15, 2012 at 09:33:34PM -0500, Robert Lee wrote:
> Add common cpuidle init functionality that can be used by various
> imx platforms.
> 
> Signed-off-by: Robert Lee <rob.lee@...aro.org>
> ---
> +
> +#ifdef CONFIG_CPU_IDLE
> +extern int imx_cpuidle_init(struct cpuidle_driver *drv);
> +#else
> +static inline int imx_cpuidle_init(struct cpuidle_driver *drv)
> +{
> +	return -ENODEV;
> +}
> +#endif

You should return succesfully here. Think about it, if imx_cpuidle_init
fails you basically do nothing except maybe printing an error message
which will be irritating when it appears on a kernel with cpuidle
disabled.

Sascha


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