netdev - Re: [PATCH 15/15] ethernet: ti: davinci_emac: add missing of_node_put after calling of_parse

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Message-ID: <1c3c541a-a183-4b23-da69-991e48a06184@ti.com>
Date:	Fri, 29 Jul 2016 14:59:46 +0530
From:	Mugunthan V N <mugunthanvnm@...com>
To:	Peter Chen <peter.chen@....com>,
	"davem@...emloft.net" <davem@...emloft.net>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"vbridger@...nsource.altera.com" <vbridger@...nsource.altera.com>,
	"isubramanian@....com" <isubramanian@....com>,
	"kchudgar@....com" <kchudgar@....com>,
	"yisen.zhuang@...wei.com" <yisen.zhuang@...wei.com>,
	"salil.mehta@...wei.com" <salil.mehta@...wei.com>,
	"thomas.petazzoni@...e-electrons.com" 
	<thomas.petazzoni@...e-electrons.com>,
	"sergei.shtylyov@...entembedded.com" 
	<sergei.shtylyov@...entembedded.com>,
	"peppe.cavallaro@...com" <peppe.cavallaro@...com>,
	"alexandre.torgue@...com" <alexandre.torgue@...com>,
	"tremyfr@...il.com" <tremyfr@...il.com>,
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	"david.daney@...ium.com" <david.daney@...ium.com>,
	"huangdaode@...ilicon.com" <huangdaode@...ilicon.com>,
	"jszhang@...vell.com" <jszhang@...vell.com>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>
Subject: Re: [PATCH 15/15] ethernet: ti: davinci_emac: add missing of_node_put
 after calling of_parse_phandle

+ Linux Omap ML

On Wednesday 27 July 2016 01:13 PM, Peter Chen wrote:
>  
>> On Wednesday 27 July 2016 07:50 AM, Peter Chen wrote:
>>> of_node_put needs to be called when the device node which is got from
>>> of_parse_phandle has finished using.
>>>
>>> Signed-off-by: Peter Chen <peter.chen@....com>
>>> ---
>>>  drivers/net/ethernet/ti/davinci_emac.c | 1 +
>>>  1 file changed, 1 insertion(+)
>>>
>>> diff --git a/drivers/net/ethernet/ti/davinci_emac.c
>>> b/drivers/net/ethernet/ti/davinci_emac.c
>>> index c6c5465..d8cb9d0 100644
>>> --- a/drivers/net/ethernet/ti/davinci_emac.c
>>> +++ b/drivers/net/ethernet/ti/davinci_emac.c
>>> @@ -1571,6 +1571,7 @@ static int emac_dev_open(struct net_device *ndev)
>>>  	if (priv->phy_node) {
>>>  		phydev = of_phy_connect(ndev, priv->phy_node,
>>>  					&emac_adjust_link, 0, 0);
>>> +		of_node_put(priv->phy_node);
>>>  		if (!phydev) {
>>>  			dev_err(emac_dev, "could not connect to phy %s\n",
>>>  				priv->phy_node->full_name);
>>>
>>
>> phy_node is accessed in case of of_phy_connect() returns error, so it has to be
>> moved after the dev_err log
>>
> 
> Yeah, you are right. I will change it, thanks.
> 

I see one more problem, when you stop and open the interface there is no
way to get the phy_node and interface will be unusable, so of_node_put()
should be moved to remove()

Regards
Mugunthan V N