linux-kernel - Re: [PATCH V2 08/11] opp: Add OPP sharing information to OPP library

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Message-id: <1564699.gQjhqzf5VE@amdc1976>
Date:	Mon, 27 Jul 2015 16:48:59 +0200
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Rafael Wysocki <rjw@...ysocki.net>, linaro-kernel@...ts.linaro.org,
	linux-pm@...r.kernel.org, rob.herring@...aro.org,
	arnd.bergmann@...aro.org, nm@...com, broonie@...nel.org,
	mturquette@...libre.com, sboyd@...eaurora.org,
	Sudeep.Holla@....com, viswanath.puttagunta@...aro.org,
	l.stach@...gutronix.de, thomas.petazzoni@...e-electrons.com,
	linux-arm-kernel@...ts.infradead.org, ta.omasab@...il.com,
	kesavan.abhilash@...il.com, khilman@...aro.org,
	santosh.shilimkar@...cle.com,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Len Brown <len.brown@...el.com>,
	open list <linux-kernel@...r.kernel.org>,
	Pavel Machek <pavel@....cz>
Subject: Re: [PATCH V2 08/11] opp: Add OPP sharing information to OPP library


Hi,

Two very minor nits:

On Monday, July 27, 2015 10:32:38 AM Viresh Kumar wrote:
> An opp can be shared by multiple devices, for example its very common
> for CPUs to share the OPPs, i.e. when they share clock/voltage rails.
> 
> This patch adds support of shared OPPs to the OPP library.
> 
> Instead of a single device, dev_opp will not contain a list of devices

s/will not/will now/ ?

> that use it. It also senses if the device (we are trying to initialize
> OPPs for) shares OPPs with a device added earlier and in that case we
> update the list of devices managed by OPPs instead of duplicating OPPs
> again.
> 
> The same infrastructure will be used for the old OPP bindings, with
> later patches.
> 
> Reviewed-by: Stephen Boyd <sboyd@...eaurora.org>
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>

[...]

> +static struct device_list_opp *_add_list_dev(const struct device *dev,
> +					     struct device_opp *dev_opp)
> +{
> +	struct device_list_opp *list_dev;
> +
> +	list_dev = kzalloc(sizeof(*list_dev), GFP_KERNEL);
> +	if (!list_dev)
> +		return NULL;
> +
> +	/* Initialize list-dev */
> +	list_add_rcu(&list_dev->node, &dev_opp->dev_list);
> +	list_dev->dev = dev;

Probably doesn't matter currently but how's about:

	list_dev->dev = dev;
	list_add_rcu(&list_dev->node, &dev_opp->dev_list);

?

> +
> +	return list_dev;
> +}

Otherwise:

Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

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