linux-kernel - Re: [PATCH] PM / OPP: discard duplicate OPP additions

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Message-ID: <CAKohponfdoPG7H4h-5s+V7CwB_SgnyqqUm9aa6G-K_cX3DOcfA@mail.gmail.com>
Date:	Wed, 14 May 2014 16:38:10 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Chander Kashyap <chander.kashyap@...aro.org>
Cc:	Nishanth Menon <nm@...com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	"rjw@...ysocki.net" <rjw@...ysocki.net>,
	Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Chander Kashyap <k.chander@...sung.com>,
	Inderpal Singh <inderpal.s@...sung.com>
Subject: Re: [PATCH] PM / OPP: discard duplicate OPP additions

On 14 May 2014 15:01, Chander Kashyap <chander.kashyap@...aro.org> wrote:
>> say we do at this point:
>> if (new_opp->rate == opp->rate) {
>>   dev_err(dev, "%s: attempt to add duplicate OPP entry (rate=%ld)\n",
>> __func__, new_opp->rate)
>>    kfree(new_opp);
>>     return -EINVAL;
>> }
>
> Yes this is more cleaner.
> But instead of dev_err,  we should use dev_warn and secondly

Correct

> return 0 rather than EINVAL, as there are independent users for this function

Why? We should actually use EEXIST here instead of EINVAL though..
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