linux-kernel - Re: [PATCH 4/7] devfreq: exynos: dev_pm_opp_put

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Message-ID: <5a9625bc-9e40-fb18-b111-9cd797943af3@samsung.com>
Date:   Fri, 6 Nov 2020 16:48:26 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>
Cc:     linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Rafael Wysocki <rjw@...ysocki.net>,
        Stephen Boyd <sboyd@...nel.org>, Nishanth Menon <nm@...com>,
        digetx@...il.com, linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/7] devfreq: exynos: dev_pm_opp_put_*() accepts NULL
 argument

On 11/6/20 4:46 PM, Chanwoo Choi wrote:
> On 11/6/20 4:42 PM, Chanwoo Choi wrote:
>> Hi Viresh,
>>
>> On 11/6/20 4:03 PM, Viresh Kumar wrote:
>>> The dev_pm_opp_put_*() APIs now accepts a NULL opp_table pointer and so
>>> there is no need for us to carry the extra check. Drop them.
>>>
>>> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
>>> ---
>>>  drivers/devfreq/exynos-bus.c | 12 ++++--------
>>>  1 file changed, 4 insertions(+), 8 deletions(-)
>>>
>>> diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
>>> index 1e684a448c9e..143fd58ec3dc 100644
>>> --- a/drivers/devfreq/exynos-bus.c
>>> +++ b/drivers/devfreq/exynos-bus.c
>>> @@ -158,10 +158,8 @@ static void exynos_bus_exit(struct device *dev)
>>>  
>>>  	dev_pm_opp_of_remove_table(dev);
>>>  	clk_disable_unprepare(bus->clk);
>>> -	if (bus->opp_table) {
>>> -		dev_pm_opp_put_regulators(bus->opp_table);
>>> -		bus->opp_table = NULL;
>>> -	}
>>> +	dev_pm_opp_put_regulators(bus->opp_table);
>>> +	bus->opp_table = NULL;
>>>  }
>>>  
>>>  static void exynos_bus_passive_exit(struct device *dev)
>>> @@ -444,10 +442,8 @@ static int exynos_bus_probe(struct platform_device *pdev)
>>>  	dev_pm_opp_of_remove_table(dev);
>>>  	clk_disable_unprepare(bus->clk);
>>>  err_reg:
>>> -	if (!passive) {
>>> -		dev_pm_opp_put_regulators(bus->opp_table);
>>> -		bus->opp_table = NULL;
>>> -	}
>>> +	dev_pm_opp_put_regulators(bus->opp_table);
>>> +	bus->opp_table = NULL;
>>>  
>>>  	return ret;
>>>  }
>>>
>>
>> Applied it. Thanks.
>>
> 
> It seems that this patch depends on first patch.
> So, need to be merged to one git repository.
> 
> Instead of applying it to devfreq.git,
> Acked-by: Chanwoo Choi <cw00.choi@...sung.com>
> 

Also, need to add 'PM /' prefix to patch title 
in order to keep the same format with already merged devfreq patches.
- 'PM / devfreq: exynos: dev_pm_opp_put_*() accepts NULL argument'

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics