linux-kernel - Re: [PATCH] arm: pm: call put_device instead of of_node_put in at91_pm_config

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Message-ID: <5B7EB51B.9080901@huawei.com>
Date:   Thu, 23 Aug 2018 21:22:35 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
CC:     <Claudiu.Beznea@...rochip.com>, <linux@...linux.org.uk>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm: pm: call put_device instead of of_node_put in at91_pm_config_ws

On 2018/8/23 20:19, Alexandre Belloni wrote:
> On 23/08/2018 19:44:38+0800, zhong jiang wrote:
>> Hi, alexandre
>>
>> Can you pick up the patch?  Thanks
>>
> We are still in the merge window, this has to wait for v4.19-rc1.
 Fine.  Thank you for let me know .
>> Best wishes,
>> zhong jiang
>>
>> On 2018/8/16 18:26, zhong jiang wrote:
>>> of_find_device_by_node takes a reference to the struct device when it
>>> finds a match via get_device. but it fails to put_device in
>>> at91_pm_config_ws, for_each_matching_node_and_match will get and put
>>> the node properly, there is no need to call the of_put_node. Therefore,
>>> just call put_device instead of of_node_put in at91_pm_config_ws.
>>>
>>> Fixes: d7484f5c6b3b ("ARM: at91: pm: configure wakeup sources for ULP1 mode")
>>> Suggested-by: Claudiu Beznea <Claudiu.Beznea@...rochip.com>
>>> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
>>> ---
>>>  arch/arm/mach-at91/pm.c | 6 +++---
>>>  1 file changed, 3 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
>>> index 32fae4d..6574f00 100644
>>> --- a/arch/arm/mach-at91/pm.c
>>> +++ b/arch/arm/mach-at91/pm.c
>>> @@ -143,15 +143,15 @@ static int at91_pm_config_ws(unsigned int pm_mode, bool set)
>>>  
>>>  			/* Check if enabled on SHDWC. */
>>>  			if (wsi->shdwc_mr_bit && !(val & wsi->shdwc_mr_bit))
>>> -				goto put_node;
>>> +				goto put_device;
>>>  
>>>  			mode |= wsi->pmc_fsmr_bit;
>>>  			if (wsi->set_polarity)
>>>  				polarity |= wsi->pmc_fsmr_bit;
>>>  		}
>>>  
>>> -put_node:
>>> -		of_node_put(np);
>>> +put_device:
>>> +		put_device(&pdev->dev);
>>>  	}
>>>  
>>>  	if (mode) {
>>