linux-kernel - Re: [PATCH 02/15] cpufreq: cpufreq-cpu0: initialize .owner field with THIS

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Message-ID: <20130804113844.GE18119@S2101-09.ap.freescale.net>
Date:	Sun, 4 Aug 2013 19:38:46 +0800
From:	Shawn Guo <shawn.guo@...aro.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
CC:	<rjw@...k.pl>, <linaro-kernel@...ts.linaro.org>,
	<patches@...aro.org>, <cpufreq@...r.kernel.org>,
	<linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<arnd.bergmann@...aro.org>
Subject: Re: [PATCH 02/15] cpufreq: cpufreq-cpu0: initialize .owner field
 with THIS_MODULE

On Wed, Jul 31, 2013 at 07:49:11PM +0530, Viresh Kumar wrote:
> CPUFreq core does following at multiple places:
> module_{get|put}(cpufreq_driver->owner)).
> 
> This is done to make sure module doesn't get unloaded if it is currently in use.
> This will work only if the .owner field of cpufreq driver is initialized with a
> valid pointer.
> 
> This field wasn't initialized for this driver, lets initialize it with
> THIS_MODULE.
> 
> Cc: Shawn Guo <shawn.guo@...aro.org>
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>

For this and imx6q-cpufreq one,

Acked-by: Shawn Guo <shawn.guo@...aro.org>

> ---
>  drivers/cpufreq/cpufreq-cpu0.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c
> index ad1fde2..a087bf1 100644
> --- a/drivers/cpufreq/cpufreq-cpu0.c
> +++ b/drivers/cpufreq/cpufreq-cpu0.c
> @@ -169,6 +169,7 @@ static struct cpufreq_driver cpu0_cpufreq_driver = {
>  	.init = cpu0_cpufreq_init,
>  	.exit = cpu0_cpufreq_exit,
>  	.name = "generic_cpu0",
> +	.owner = THIS_MODULE,
>  	.attr = cpu0_cpufreq_attr,
>  };
>  
> -- 
> 1.7.12.rc2.18.g61b472e
> 

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