linux-kernel - Re: [PATCH 3/9] memory: samsung: exynos5422-dmc: use scoped device node handling to simplify error paths

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Message-ID: <768894bb-a12a-4919-9b4d-b579c153a556@linaro.org>
Date: Wed, 14 Aug 2024 19:57:18 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc: Krzysztof Kozlowski <krzk@...nel.org>,
 Nicolas Ferre <nicolas.ferre@...rochip.com>,
 Alexandre Belloni <alexandre.belloni@...tlin.com>,
 Claudiu Beznea <claudiu.beznea@...on.dev>, Lukasz Luba
 <lukasz.luba@....com>, Alim Akhtar <alim.akhtar@...sung.com>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Thierry Reding <thierry.reding@...il.com>,
 Jonathan Hunter <jonathanh@...dia.com>,
 Santosh Shilimkar <ssantosh@...nel.org>, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
 linux-samsung-soc@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
 linux-tegra@...r.kernel.org
Subject: Re: [PATCH 3/9] memory: samsung: exynos5422-dmc: use scoped device
 node handling to simplify error paths

On 14/08/2024 18:42, Jonathan Cameron wrote:
> On Mon, 12 Aug 2024 15:33:57 +0200
> Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:
> 
>> Obtain the device node reference with scoped/cleanup.h to reduce error
>> handling and make the code a bit simpler.
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Trivial comments inline
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> 
>> ---
>>  drivers/memory/samsung/exynos5422-dmc.c | 31 +++++++++++--------------------
>>  1 file changed, 11 insertions(+), 20 deletions(-)
>>
>> diff --git a/drivers/memory/samsung/exynos5422-dmc.c b/drivers/memory/samsung/exynos5422-dmc.c
>> index da7ecd921c72..d3ae4d95a3ba 100644
>> --- a/drivers/memory/samsung/exynos5422-dmc.c
>> +++ b/drivers/memory/samsung/exynos5422-dmc.c
>> @@ -4,6 +4,7 @@
>>   * Author: Lukasz Luba <l.luba@...tner.samsung.com>
>>   */
>>  
>> +#include <linux/cleanup.h>
>>  #include <linux/clk.h>
>>  #include <linux/devfreq.h>
>>  #include <linux/devfreq-event.h>
>> @@ -1176,10 +1177,10 @@ static int of_get_dram_timings(struct exynos5_dmc *dmc)
>>  {
>>  	int ret = 0;
>>  	int idx;
>> -	struct device_node *np_ddr;
> 
> This would definitely benefit from a
> struct device *dev = dmc->dev;

True, I'll do it in separate patch.

> 
>>  	u32 freq_mhz, clk_period_ps;
>>  
>> -	np_ddr = of_parse_phandle(dmc->dev->of_node, "device-handle", 0);
>> +	struct device_node *np_ddr __free(device_node) = of_parse_phandle(dmc->dev->of_node,
>> +									  "device-handle", 0);
> Trivial. Maybe consider the wrap suggested in patch 1.
>> +	struct device_node *np_ddr __free(device_node) =
> 		of_parse_phandle(dmc->dev->of_node, "device-handle", 0);

Ack.



Best regards,
Krzysztof