linux-kernel - Re: [PATCH V4 2/8] opp: call of_node_{get|put}() from of_init_opp

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Date:	Thu, 29 May 2014 17:32:37 -0500
From:	Nishanth Menon <nm@...com>
To:	Viresh Kumar <viresh.kumar@...aro.org>, <rjw@...ysocki.net>
CC:	<linaro-kernel@...ts.linaro.org>, <linux-pm@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <arvind.chauhan@....com>,
	<inderpal.s@...sung.com>, <chander.kashyap@...aro.org>,
	<pavel@....cz>, <len.brown@...el.com>, <sudeep.holla@....com>
Subject: Re: [PATCH V4 2/8] opp: call of_node_{get|put}() from of_init_opp_table()

On 05/27/2014 06:50 AM, Viresh Kumar wrote:
> All callers of of_init_opp_table() are required to take reference of
> dev->of_node, by initiating calls to of_node_{get|put}(), before and after
> calling of_init_opp_table().
> 
> Its better to call these from within of_init_opp_table(), no fun adding
> redundant code to every caller.
> 
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> ---
>  drivers/base/power/opp.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
> index faae9cf..2b615b9 100644
> --- a/drivers/base/power/opp.c
> +++ b/drivers/base/power/opp.c
> @@ -622,6 +622,9 @@ int of_init_opp_table(struct device *dev)
>  	const __be32 *val;
>  	int nr;
>  
> +	if (!of_node_get(dev->of_node))
> +		return -ENODEV;
> +
>  	prop = of_find_property(dev->of_node, "operating-points", NULL);
>  	if (!prop)
>  		return -ENODEV;
> @@ -649,6 +652,7 @@ int of_init_opp_table(struct device *dev)
>  		nr -= 2;
>  	}
>  
> +	of_node_put(dev->of_node);
>  	return 0;
>  }
>  EXPORT_SYMBOL_GPL(of_init_opp_table);
> 
With the same $subject comment as patch #1:
Acked-by: Nishanth Menon <nm@...com>

-- 
Regards,
Nishanth Menon
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